WO2007049431A1 - Device and method for reproducing optical disc - Google Patents

Device and method for reproducing optical disc Download PDF

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Publication number
WO2007049431A1
WO2007049431A1 PCT/JP2006/319751 JP2006319751W WO2007049431A1 WO 2007049431 A1 WO2007049431 A1 WO 2007049431A1 JP 2006319751 W JP2006319751 W JP 2006319751W WO 2007049431 A1 WO2007049431 A1 WO 2007049431A1
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WO
WIPO (PCT)
Prior art keywords
information
optical disc
reproduction
signal
recorded
Prior art date
Application number
PCT/JP2006/319751
Other languages
French (fr)
Japanese (ja)
Inventor
Manabu Shimodaira
Yoshimichi Nishio
Yoshihiro Hashizuka
Hiroki Goto
Hideaki Tsurumi
Hiroyuki Kobayashi
Takaaki Ujiie
Hidetaka Urabe
Hiroshi Someya
Original Assignee
Pioneer Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pioneer Corporation filed Critical Pioneer Corporation
Priority to JP2007542292A priority Critical patent/JP4648951B2/en
Publication of WO2007049431A1 publication Critical patent/WO2007049431A1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0945—Methods for initialising servos, start-up sequences

Definitions

  • the present invention relates to an optical disc playback apparatus and an optical disc playback method for reading information from an optical disc with high accuracy.
  • FIG. 1 shows a block diagram of the optical disc playback apparatus 50.
  • the optical disk reproducing device 50 includes a disk motor 51, an optical pickup 52, a servo control unit 53, a driver 54, an audio signal processing unit 55, a DA converter 56, an audio signal output terminal 57, a microcomputer 58, It has.
  • the disk motor 51 is a motor for rotating the optical disk 59 set in the optical disk reproducing device 50.
  • the optical pickup 52 is a semiconductor laser that generates light to irradiate an optical disk (not shown), a lens for irradiating the generated light onto the optical disk, a light receiver that receives the reflected light, and a focus and tracking. It is equipped with a special feature for the purpose.
  • the servo control unit 53 includes an RF amplifier 53a and a servo signal processing unit 53b.
  • the RF amplifier 53a amplifies the RF signal, which is a signal including the output power tracking error signal and focus error signal of the optical pickup 52 and information stored in the optical disc 59, to a predetermined level and outputs the amplified signal to the servo signal processing unit 53b.
  • the servo signal processing unit 53b controls the optical pickup 52 so that the signal can be accurately read from the optical disc 59 based on the tracking error signal and the focus error signal input from the RF amplifier 53a.
  • the RF signal input from the RF amplifier 53 a is subjected to analog Z-digital conversion and output to the audio signal processing unit 55.
  • the driver 54 amplifies the signal input from the servo signal processing unit 53b and outputs the amplified signal to the disk motor 51 and the optical pickup 52.
  • the audio signal processing unit 55 outputs the digital signal input from the servo signal processing unit 53b as a sound. Demodulate to voice signal and output to DA converter 56.
  • the DA converter 56 converts the digital signal input from the audio signal processing unit 55 into an analog signal and outputs the analog signal from the audio output terminal 57.
  • the microcomputer 58 controls the entire optical disc reproducing device 50 in each operation such as reproduction and stop.
  • step S50 it is determined whether or not the optical disk 59 is set in the optical disk reproducing device 50. If it is set (in the case of YES), proceed to step S51.
  • step S51 the disk motor 51 is activated to rotate the optical disk 59, and the process proceeds to step S52.
  • step S52 the semiconductor laser of the optical pickup 52 is turned on to irradiate the optical disc 59 with laser light. Then, the optical pickup 52 is moved to a position where the reflected light can be received, and the reflected light is received by the optical pickup 52 receiver to generate a tracking error signal, a focus error signal, and an RF signal to pass through the RF amplifier 53a. To input to the servo signal processor 53b. The servo signal processing unit 53b determines whether or not the optical disc 59 is a disc that can be played back by the optical disc playback device 50. If the disc is a disc that can be played, the process proceeds to step S53.
  • step S53 the servo signal processing unit 53b is in a state in which the focus servo can be operated, that is, based on the focus error signal after this step, the optical pickup 52 is operated so as to focus.
  • the process proceeds to step S54.
  • step S54 the servo signal processing unit 53b adjusts the tracking balance based on the tracking error signal, adjusts the reading in the tracking direction to be in an optimum state, and proceeds to step S55. .
  • step S55 the servo signal processing unit 53b can operate the tracking servo, that is, the optical pickup 52 is operated so as to follow the track based on the tracking error signal after this step. Proceed to step S56.
  • step S56 the servo signal processing unit 53b adjusts the focus balance. Then, after adjusting the tracking gain and the focus gain so that information can be read optimally from the optical disk 59, the process proceeds to step S57.
  • step S57 reading of information recorded on the optical disk 59 from the optical disk 59 is started. That is, playback is started and the process proceeds to step S58.
  • step S58 it is determined whether or not the reproduction has stopped. If playback has stopped (YES), go to step S59, and if playback has not stopped (NO), determine again.
  • step S59 it is determined whether or not the force has been resumed. If playback has been resumed, the process returns to step S51. If playback has not been resumed, the process proceeds to step S60.
  • step S60 it is determined whether or not the optical disk 59 has been ejected. If it is discharged (in the case of YES), the process ends. If it is not discharged (in the case of NO), the process returns to step S59.
  • the above-described operation has a problem that it takes time until the optical disk 59 is set and force reproduction is started.
  • the adjustment value of the optical pickup is stored in advance in the reproduction apparatus, and the value can be used during reproduction to shorten the time until reproduction without taking time for adjustment.
  • the described apparatus has been proposed.
  • Patent Document 1 Japanese Patent Laid-Open No. 5-242504
  • the present invention provides an optical disc playback device that can shorten the time until information recorded on the optical disc is played back (sound is played back) and can be played back with high accuracy, for example, in an optical disc playback device. It is an object to provide an apparatus and a reproduction method. Means for solving the problem
  • the invention according to claim 1 is an optical pick that irradiates a laser beam to an optical disk on which information is recorded and obtains a signal by reflected light from the optical disk.
  • servo control means for performing control for driving the optical pickup in a focus direction and tracking direction based on a signal obtained by the optical pickup, and adjustment means for performing various adjustments of the servo control means
  • a recording means for recording signals necessary for the adjustment means to perform various adjustments, a reproduction means for reproducing information recorded on the optical disc, and a servo control means for receiving the reflected light. And the signal force obtained by the reflected light.
  • the reproducing means records the signals necessary for the adjusting means to perform various adjustments on the recording means, and the signal obtained upon activation of the servo control means. Each of the adjustment means using the necessary signals recorded in the recording means in parallel with the reproduction of the information. And a control means for performing seed adjustment.
  • the invention according to claim 2 is based on an optical pickup that irradiates an optical disc on which information is recorded with laser light and obtains a signal by reflected light from the optical disc, and a signal obtained by the optical pickup.
  • Servo control means for performing control for driving the optical pickup in the focus direction and tracking direction, adjustment means for performing various adjustments of the servo control means, and information storage means for storing information recorded on the optical disc;
  • reproducing means for reproducing the information recorded on the optical disc; and activating the servo control means to receive the reflected light; and based on a signal obtained upon activation of the servo control means.
  • the optical pickup is caused to read the information from the optical disc at a speed faster than the reproduction speed, and the read information is recorded in the information storage means.
  • the reproduction unit starts reproduction of the information, and when the information storage unit stores the predetermined amount of information, reading of the information from the optical disc is stopped, and the reproduction unit reads out the information from the information storage unit.
  • the optical disk on which information is recorded is irradiated with laser light, a signal is obtained from the reflected light from the optical disk, and the signal is recorded on the optical disk based on the signal!
  • the optical disk reproducing method for controlling the information to be read accurately the reflected light is received and the signal force obtained by the reflected light is recorded, and signals necessary for various adjustments are recorded, and Based on the signal obtained by receiving the reflected light.
  • the reproduction of information is started and various adjustments are performed using the necessary signals recorded in parallel with the reproduction of the information.
  • the optical disk on which information is recorded is irradiated with laser light, a signal is obtained from the reflected light from the optical disk, and the signal is recorded on the optical disk based on the signal!
  • an optical disc reproducing method for controlling the read information to be read accurately the information is read from the optical disc at a speed higher than the reproduction speed, the read information is stored, and the reproduction of the information is started. When a predetermined amount of the information is stored, reading of information from the optical disk is stopped, the stored information is reproduced, and various adjustments are performed in parallel.
  • FIG. 1 is a block diagram of a conventional optical disc playback apparatus.
  • FIG. 2 is a flowchart showing the operation from the disc insertion cover to the playback of the playback device shown in FIG.
  • FIG. 3 is a block diagram of a CD player according to the first embodiment of the present invention.
  • FIG. 4 is an explanatory diagram of a light receiver of the optical pickup in the CD player shown in FIG.
  • FIG. 5 Both (a) and (b) are explanatory diagrams of the waveforms of the tracking error signal and the focus error signal.
  • FIG. 6 is a part of a flow chart showing the operation up to the disc insertion force reproduction of the CD player shown in FIG.
  • FIG. 7 is another part of the flow chart showing the operation up to the disc insertion force reproduction of the CD player shown in FIG. 3.
  • FIG. 8 is a block diagram of a CD player that works on the second embodiment of the present invention.
  • FIG. 9 is a part of a flow chart showing the operation up to the disc insertion force reproduction of the CD player shown in FIG.
  • FIG. 10 is another part of the flowchart showing the operation from disc insertion to playback of the CD player shown in FIG. 8.
  • Servo control unit (servo control means, adjustment means, control means, setting means)
  • An optical disk reproducing apparatus activates a servo control means for controlling an optical pickup and a signal necessary for the signal power adjusting means to obtain a reflected light power of the optical disk to perform various adjustments.
  • the adjustment means performs adjustment using such information. By doing this Therefore, only necessary information is recorded before reproduction, and adjustment is performed after the reproduction of information on the optical disk is started. Therefore, the time until the information recorded on the optical disk is reproduced after the optical disk is set is reproduced. It can be shortened and reproduced accurately.
  • an optical disk reproducing apparatus activates servo control means for controlling an optical pickup, and the information is obtained at a speed higher than the reproducing speed of the optical pickup from the optical disk. And reading the information in the information storage means and starting the reproduction of the information in the reproduction means. When a predetermined amount of information is stored in the information storage means, the reading of the information from the optical disk is stopped, In the meantime, the reproduction means reproduces the information read from the information storage means, and the adjustment means adjusts in parallel. In this way, while the information is being read from the information storage means, the optical pickup has a free time, and during this time, the conventional adjustment can be performed before the reproduction. Even without recording necessary information, it is possible to shorten the time until the information recorded on the optical disk is reproduced after the optical disk is set, and the information can be reproduced accurately.
  • the signal recorded in the recording means and necessary for the adjustment means to perform various adjustments may be a tracking error signal level and a focus error signal level. In this way, adjustment is performed after the information on the optical disk starts to be reproduced based on the level of the tracking error signal and the level of the focus error signal recorded on the recording means before reproducing the optical disk. Can do.
  • a storage means for saving the adjustment value of the servo control means adjusted by the adjustment means, and when the information reproduction from the optical disk is started again after the information reproduction from the optical disk is once stopped A setting means for setting the adjustment value stored in the storage means to the servo control means may be provided. From this point of view, there is no need to make adjustments when reading information recorded on the optical disc again after reading of the information recorded on the optical disc is stopped. Can be shortened.
  • the reflected light is received and the signal force obtained by the reflected light is recorded, and signals necessary for performing various adjustments are recorded, and Information reproduction is started based on the signal obtained by receiving the reflected light.
  • Various adjustments are made using the necessary signals recorded in parallel with the reproduction of the information. In this way, only necessary information is recorded before reproduction, and adjustment is performed after the reproduction of the optical disc power information. Therefore, the information recorded on the optical disc is reproduced after setting the optical disc. Time to start can be shortened and can be played back with high accuracy.
  • an optical disc reproducing method reads the information from the optical disc at a speed higher than a reproducing speed, stores the read information, and stores the information.
  • a predetermined amount of the information is stored, reading of information from the optical disk is stopped, the stored information is reproduced, and various adjustments are performed in parallel.
  • the stored information is being read out, there is a free time during which the optical disc power is not read out. Even if the necessary information is not recorded before the reproduction, the time from setting the optical disc to reproducing the information recorded on the optical disc can be shortened and reproduced accurately.
  • the level of the tracking error signal and the level of the focus error signal may be obtained from the reflected light of the optical disk, and may be the necessary signals to be recorded for performing various adjustments such as balance and gain.
  • the optical disc player can make an adjustment after starting to reproduce the information on the basis of the level of the tracking error signal and the level of the focus error signal recorded before reproducing the optical disc.
  • the saved adjustment value is set. Information may be reproduced. By doing so, it is not necessary to make an adjustment when reproducing information again after the reproduction of information from the optical disk is stopped, so that the time until reading the information recorded on the optical disk can be shortened.
  • a CD (Compact Disc) player 1 as an optical disk reproducing apparatus useful for the first embodiment of the present invention will be described with reference to Figs.
  • the CD player 1 includes a disk motor 2, an optical pickup 3, a servo control unit 4, a nother 5, a driver 6, and a sound.
  • a voice signal processing unit 7, a DA converter 8, a voice signal output terminal 9, and a microcomputer 10 are provided.
  • the disc motor 2 is a motor for rotating the CD 11 as an optical disc set in the CD player 1, and includes a spindle motor or the like.
  • the optical pickup 3 includes a semiconductor laser (not shown) that generates light to be irradiated on the CD 11, a lens for irradiating the light on the CD 11, an actuator for adjusting the focus and tracking, and the light reflected from the CD 11.
  • Receiver 30 that receives the signal, and generates and outputs a tracking error signal and a focus error signal from the output of the light receiver 30 and an RF signal including information read from the CD 11.
  • the light receiver 30 includes a four-divided light receiver 31 and a pair of light receivers 32 and 33 arranged in the track direction of the CD 11 with the four-divided light receiver interposed therebetween.
  • the four-divided light receiver 31 includes light receiving surfaces 31a, 31b, 31c, and 31d.
  • the tracking error signal is generated by the well-known three-beam method based on the light quantity difference between the light receivers 32 and 33, and has the waveform shown in FIG. 5 (a).
  • the focus error signal is subtracted from the sum of the outputs of the light receiving surfaces 31a and 31c at one diagonal position in the quadrant receiver 31 and the output of the light receiving surfaces 31b and 31d at the other diagonal position. (Ie (31a + 31c) — (31b + 31d)), and the waveform shown in Fig. 5 (b) is obtained.
  • the RF signal is the sum of the outputs from all the light receiving surfaces 31a, 31b, 31c, and 31d of the quadrant receiver.
  • the servo control unit 4 as servo control means, adjustment means, control means, and setting means is also configured with an RF amplifier 4a and a servo signal processing unit 4b.
  • the RF amplifier 4a amplifies the signal output from the optical pickup 3 to a predetermined value and outputs it to the servo signal processing unit 4b.
  • the servo signal processing unit 4b as an adjustment means, control means, and setting means contains a CPU (Central Processing Unit), RAM (Random Access Memory), and ROM (Read Only Memory), and is input from the RF amplifier 4a. Based on the tracking error signal and focus error signal, the focus and tracking control of the optical pickup 3 and various adjustments described later can be performed by the control program recorded in the ROM, and the information recorded on the CD 11 can be read accurately.
  • the servo signal processor 4b is an RF amplifier 4 Tracking error signal and focus error signal strength as signals obtained from optical pickup 3 input from a Acquire tracking error signal level and focus error signal level as signals necessary for various adjustments, Store in buffer 5.
  • the level of the tracking error signal indicates the values of VI and V2 in Fig. 5 (a), and the level of the focus error signal indicates the values of V3 and V4 in Fig. 5 (b), respectively.
  • the buffer 5 as a recording means and a storage means is composed of a RAM, and includes a tracking error signal level and a focus error signal as signals necessary for performing various adjustments acquired by the servo signal processing unit 4b. Record the level. Also, record and save the adjustment value when adjusted by the servo signal processor 4b.
  • the driver 6 amplifies the signal input from the servo signal processing unit 4b and outputs the amplified signal to the disk motor 2 and the optical pickup 3.
  • the audio signal processing unit 7 as a reproduction means demodulates the digital signal input from the servo signal processing unit 4b into an audio signal, performs error correction, and outputs the audio signal to the DA converter 8.
  • the DA converter 8 converts the digital signal input from the audio signal processing unit 7 into an analog signal and outputs the analog signal from the audio signal output terminal 9.
  • the microcomputer 10 controls the entire CD player 1 in each operation such as setting, ejecting, playing, and stopping the CD 11.
  • step S1 it is determined whether or not CD11 is set in CD player 1. If it is set (YES), the process proceeds to step S2, and if it is not set (NO) ) Again.
  • step S2 the disk motor 2 is started via the dry motor 6 to rotate the CD 11, and the process proceeds to step S3.
  • step S3 the semiconductor laser of the optical pickup 3 is turned on, and the optical pickup 3 is moved to a position where the reflected light can be received. Then, the laser beam is irradiated on the CD 11, the reflected light is received by the light receiver 30, and the resulting signal is input to the servo signal processing unit 4b via the RF amplifier 4a.
  • the servo signal processing unit 4b determines whether the CD 11 is a disc that can be played by the CD player 1 based on the input signal. If the disc is a playable disc, the process proceeds to step S4. If it ends.
  • step S4 as a recording means, the tracking error signal level and the focus error signal level as signals necessary for performing various adjustments are input to the servo signal processing unit 4b. Acquire error signal and focus error signal strength, store them in buffer 5, and proceed to step S5.
  • step S5 the focus servo can be operated, that is, the servo in the focus direction is always operated based on the focus error signal after this step, that is, the operation for focusing is performed. Proceed to step S6.
  • step S6 the tracking servo can be operated, that is, the servo in the tracking direction is always operated based on the tracking error signal after this step. Proceed to step S7.
  • step S 7 reproduction of information recorded on the CD 11 is started in step S 7 and the process proceeds to step S 8.
  • step S 8 it starts reading the TOC (Table Of Contents) of CD 11, and then reads and plays music and other information.
  • the RF signal containing information such as TOC and music input from the optical pickup 3 via the RF amplifier 4a to the servo signal processing unit 4b is converted to analog Z digital and output to the audio signal processing unit 7.
  • the audio signal processing unit 7 demodulates the audio signal and corrects the error.
  • the DZA converter 8 performs digital Z-analog conversion and outputs it from the audio signal output terminal 9. That is, CD11 playback is started after this step.
  • step S8 it is determined whether or not the reproduction is due to restarting after stopping.
  • step S13 If it is due to resumption (in the case of YES), the process proceeds to step S13. If it is not due to resumption (in the case of NO), the process proceeds to step S9.
  • step S9 as adjusting means, the tracking error stored in the notch 5 is stored.
  • the tracking balance is adjusted based on the level of one signal so that the reading in the tracking direction of CD11 is optimized, and the process proceeds to step S10.
  • step S10 as an adjustment means, the focus balance is adjusted based on the level of the focus error signal stored in the buffer 5 !, and the reading of the CD11 in the focus direction is optimal. Adjust to step S11 and proceed to step S11.
  • the focus balance adjustment is performed by making the absolute values of V 3 and V4 in FIG. 5 (b) almost equal, that is, above the OV line of the waveform in FIG. 5 (b).
  • the output of the servo signal processing unit 4b is adjusted so that the lower area is almost equal.
  • step S 11 the tracking gain and the focus gain are adjusted, and the process proceeds to step S 12.
  • step S 12 By making adjustments up to this step, reading information from CD11 is in an optimal state. That is, adjustment is performed so that the information can be optimally read from the CD 11 using the necessary signals recorded in parallel with the reading of the information recorded on the CD 11 in steps S9 to S11.
  • the tracking gain and focus gain are adjusted as follows. First, a disturbance having a predetermined frequency is applied to the signal output from the servo signal processing unit 4b to the driver 6. Then, the tracking error signal and the focus error signal affected by this disturbance are input from the optical pickup 3 to the servo signal processing unit 4b via the RF amplifier 4a. Then, the tracking error signal level and focus error signal level affected by the disturbance, and the tracking error signal level and focus error signal level target values stored in advance in the ROM in the servo signal processing unit 4b. Compare with, and instruct the RF amplifier 4a to achieve the target value, and adjust the gain of the tracking error signal and focus error signal.
  • step S12 as storage means, the value adjusted in steps S9 to S11 is stored in buffer 5, and the process proceeds to step S13.
  • step S13 it is determined whether or not the reproduction is stopped. If playback has stopped (YES), go to step S14, and if playback has not stopped (NO), determine again.
  • step S14 it is determined whether or not the power has been resumed. If playback has been resumed (YES), the process proceeds to step S16, and if playback has not been resumed (NO), the process proceeds to step S15.
  • step S15 it is determined whether or not the CD 11 is ejected from the CD player 1. If discharged, the process ends. If not discharged, the process returns to step S14.
  • step S16 as setting means, the adjustment values stored in buffer 5 in step S12 are read, and the tracking balance, focus balance, tracking gain, and focus gain are set in the RF amplifier 4a and the servo signal processing unit 4b. Return to step S5.
  • the tracking error signal level and the focus error signal level are stored in the buffer 5 in step S4, and after the reproduction is started in step S7, the tracking servo and the tracking servo are performed in steps S9 to S11 in parallel with the reproduction.
  • the focus servo can be adjusted.
  • step S12 the adjustment value adjusted in step S12 is stored, the resumption of reproduction is detected in step S14, and the adjustment value is set in the servo control unit 4 in step S16. Then, by proceeding to step S13 as playback by restarting at step S8, when reading from the CD 11 is stopped once after reading from the CD 11 is started, playback can be performed without adjustment.
  • the control program is executed by the CPU of the servo signal processing unit 4 b and the level of the tracking error signal and the level of the focus error signal are stored in the buffer 5.
  • the tracking balance, focus balance, tracking gain and focus gain are adjusted based on the level of the tracking error signal and the level of the focus error signal stored in the buffer 5.
  • Example 2 Next, a CD player 1 as an optical disk reproducing apparatus that is useful in the second embodiment of the present invention will be described with reference to FIGS.
  • the same parts as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.
  • a reproduction information buffer 20 as information storage means is provided between the servo signal processing unit 4 b and the audio signal processing unit 7.
  • the following reproduction is performed as a measure for skipping sound.
  • information is read from CD11 at double speed by rotating CD11 at double speed for information playback.
  • the read information is stored in the reproduction information buffer 20 via the optical pickup 3 via the RF amplifier 4a and the servo signal processing unit 4b, and also output to the audio signal processing unit 7, where the audio signal processing unit 7
  • the demodulated information is demodulated into audio signals at the same speed and error correction is performed, and then output to the DA converter 8.
  • the audio signal processing unit 7 switches to the information stored in the reproduction information buffer 20 instead of the reproduction information directly input from the servo signal processing unit 4b, thereby reproducing the reproduction information buffer.
  • Read out from 20 demodulate to audio signal, perform error correction, etc., then output to DA converter 8.
  • the reproduction information buffer 20 exceeds a predetermined amount, reading of information from the CD 11 is temporarily stopped, and various adjustments that have been performed before reproduction can be performed during this time.
  • information is read from the reproduction information buffer 20 and falls below a predetermined value, information is read from the CD 11 and stored in the reproduction information buffer 20.
  • FIG. 9 and FIG. 10 Control of the operation from setting the CD 11 in the CD player 1 having the configuration shown in FIG. 8 to reproducing information from the CD 11 will be described with reference to the flowcharts shown in FIG. 9 and FIG.
  • the flowchart shown in FIG. 9 and FIG. 10 is realized by the CPU of the servo signal processing unit 4b executing the control program recorded in the ROM of the servo signal processing unit 4b as in the first embodiment. .
  • step S4 is deleted, step S20 and step S21 are added, and step S9.
  • Step S10 are changed to Step S9 'and Step S10, respectively. That is, after disc discrimination in step S3, the level of the tracking error signal and the level of the focus error signal used in Example 1 are buffered.
  • step S5 the focus servo is turned on in step S5
  • step S20 is performed
  • step S9 is performed after the determination in step S8.
  • step S20 after the tracking servo is turned on in step S6, the information starts to be read from the CD 11 at a double speed, starts storing information in the reproduction information buffer 20, and proceeds to step S7.
  • Step S7 is the same as that of the first embodiment, and step S21 determines whether or not information is accumulated in the reproduction information buffer 20 at a predetermined value or more. If it is accumulated (in the case of YES), the CD11 The reading of force information is paused and the process proceeds to step S8.
  • the signal force input from the servo signal processing unit 4 b is also switched to the signal read from the reproduction information buffer 20. If more than the specified amount has not been accumulated (NO), judge again.
  • Step S8 is the same as that in the first embodiment.
  • the level of the tracking error signal as a signal necessary for performing various adjustments in order to adjust the tracking balance. Is obtained from the tracking error signal, and the tracking balance is adjusted based on the level! /, And the reading in the tracking direction of the CD 11 is adjusted to be optimal, and the process proceeds to step S1CT.
  • Step S1 as an adjustment means (Oh !, and, from the focus error signal, obtains the level of the focus error signal as a signal necessary for performing various adjustments in order to adjust the focus balance. Based on the level, adjust the focus balance and adjust the CD11 focus direction to the optimum reading, and proceed to step S11. It is the same.
  • information read out from the CD 11 at double speed is being reproduced and stored in the reproduction information buffer 20, and when it reaches a predetermined amount, reading from the CD 11 is paused for reproduction information.
  • the optical pickup 3 is temporarily stopped by reading the information from the CD 11.
  • servo control unit 4 can be freed up.
  • Level and focus error signal level, tracking balance and focus balance adjustment, and tracking gain and focus gain adjustment can be performed in parallel with playback. Since the information read from the buffer 20 is reproduced and output from the audio signal output terminal 9, the CD player 1 is adjusted in parallel with the reproduction). Even if the tracking error signal level and focus error signal level are not memorized, the time from CD11 setting to the start of information reproduction is shortened.
  • step S12 when the adjustment value acquired in step S12 is set in the RF amplifier 4a or the servo signal processing unit 4b in step S16 and playback is resumed,
  • the adjustment after the step may be performed. In this way, it is possible to further improve the reproduction accuracy by further adjusting the adjustment value once acquired.
  • the present invention may be applied to other optical disc playback apparatuses such as a DVD (Digital Versatile Disc) player and an MD (Mini Disc) player using an optical disc playback apparatus as a CD player.
  • DVD Digital Versatile Disc
  • MD Mini Disc
  • CD player 1 Is recorded in the buffer 5, and the audio signal processing unit 7 starts reproducing information based on the signal obtained when the servo control unit 4 is activated, and is recorded in the buffer 5 in parallel with the information reproduction. And a servo signal processing unit 4b for performing various adjustments by the servo signal processing unit 4b using necessary signals.
  • CD player 1 Is recorded in the buffer 5, and the audio signal processing unit 7 starts reproducing information based on the signal obtained when the servo control unit 4 is activated, and is recorded in the buffer 5 in parallel with the information reproduction.
  • a servo signal processing unit 4b for performing various adjustments by the servo signal processing unit 4b using necessary signals.
  • (Appendix 2) Optical pickup 3 that obtains a tracking error signal and a focus error signal by irradiating a laser beam to CD11 on which information is recorded and reflected from CD11, and tracking obtained by optical pickup 3 Based on the error signal and the focus error signal, the servo control unit 4 that performs control for driving the optical pickup 3 in the focus direction and the tracking direction, and the servo signal processing unit 4b that performs various adjustments of the servo control unit 4
  • the playback information buffer 20 for storing the information recorded on the CD 11, the audio signal processing unit 7 for reproducing the information recorded on the CD 11, and the servo control unit 4 to receive the reflected light
  • the optical pickup 3 is made to read information from the CD 11 at a speed faster than the playback speed based on the signal obtained when the servo control unit 4 is started, and the read information is stored in the playback information buffer.
  • the audio signal processing unit 7 starts reproducing information and a predetermined amount of information is stored in the reproduction information buffer 20, reading of information from the CD 11 is stopped and the audio signal processing unit 7
  • a CD player 1 comprising: a servo signal processing unit 4b for reproducing information read from the reproduction information buffer 20 and performing various adjustments by the servo signal processing unit 4b in parallel.
  • the optical pickup 3 while information is being read from the reproduction information buffer 20, the optical pickup 3 has a free time, and during this time, adjustments that have been made before reproduction can be performed. Therefore, even if the tracking error signal level and focus error signal level are not recorded in the buffer 5 before playback, the time from setting the CD11 to playback of the information recorded on the CD11 is shortened. it can.
  • the information is read from the CD 11 at a speed higher than the playback speed, the read information is stored and the information playback is started, and when a predetermined amount of information is stored, the information read from the CD 11 is stopped and the stored information is stored.
  • CD11 playback method characterized in that various adjustments are made in parallel with the playback of the CD.
  • the optical disc Since there is a free time during which no powerful reading is performed, it is possible to make adjustments that were performed before playback during this period.For this purpose, the level of the tracking error signal and the level of the focus error signal are recorded in buffer 5 before playback. Even if it is not necessary, the time from setting the optical disc to reproducing the information recorded on the optical disc can be shortened.

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

[PROBLEMS] To shorten a time required for reproducing sounds and the like in an optical disc reproducing device. [MEANS FOR SOLVING PROBLEMS] In an optical disc reproducing device, s servo control section (4) for controlling an optical pickup (3) is started, and at the same time, a level of the tracking error signal and a level of a focus error signal required for performing various adjustments of balance, gain and the like are recorded in a buffer (5) by a servo signal processing section (4b) from the tracking error signal and the focus error signal obtained from the reflection light from a CD (11). The adjustments are made by using the level of the tracking error signal and the level of the focus error signal recorded in the buffer (5) while information recorded in the CD (11) is reproduced.

Description

明 細 書  Specification
光ディスク再生装置および再生方法  Optical disc playback apparatus and playback method
技術分野  Technical field
[0001] 本発明は、光ディスクから高精度に情報を読み取る光ディスク再生装置および光デ イスク再生方法に関する。  The present invention relates to an optical disc playback apparatus and an optical disc playback method for reading information from an optical disc with high accuracy.
背景技術  Background art
[0002] 従来、光ディスク再生装置において、光ディスクをセットしてから光ディスクに記録さ れた情報の再生が行われるまでの動作を図 1および図 2を参照して説明する。  [0002] Conventionally, operations in an optical disk reproducing apparatus from when an optical disk is set until information recorded on the optical disk is reproduced will be described with reference to FIG. 1 and FIG.
[0003] 図 1に光ディスク再生装置 50のブロック図を示す。光ディスク再生装置 50は、ディ スクモータ 51と、光ピックアップ 52と、サーボ制御部 53と、ドライバ 54と、音声信号処 理部 55と、 DAコンバータ 56と、音声信号出力端子 57と、マイクロコンピュータ 58と を備えている。  FIG. 1 shows a block diagram of the optical disc playback apparatus 50. The optical disk reproducing device 50 includes a disk motor 51, an optical pickup 52, a servo control unit 53, a driver 54, an audio signal processing unit 55, a DA converter 56, an audio signal output terminal 57, a microcomputer 58, It has.
[0004] ディスクモータ 51は、光ディスク再生装置 50にセットされた光ディスク 59を回転させ るためのモータである。光ピックアップ 52は、図示しない光ディスクに照射する光を発 生させる半導体レーザや、発生した光を光ディスク上に照射するためのレンズ、光デ イスタカ 反射された光を受ける受光器およびフォーカスやトラッキングを合わせるた めのァクチユエ一タ等を備えて 、る。  [0004] The disk motor 51 is a motor for rotating the optical disk 59 set in the optical disk reproducing device 50. The optical pickup 52 is a semiconductor laser that generates light to irradiate an optical disk (not shown), a lens for irradiating the generated light onto the optical disk, a light receiver that receives the reflected light, and a focus and tracking. It is equipped with a special feature for the purpose.
[0005] サーボ制御部 53は、 RFアンプ 53aとサーボ信号処理部 53bとから構成されている 。 RFアンプ 53aは、光ピックアップ 52の出力力 トラッキングエラー信号やフォーカス エラー信号および光ディスク 59に記憶された情報を含む信号である RF信号を所定 のレベルに増幅しサーボ信号処理部 53bへ出力する。サーボ信号処理部 53bは RF アンプ 53aから入力されるトラッキングエラー信号とフォーカスエラー信号に基づいて 光ディスク 59から正確に信号が読み取れるように光ピックアップ 52を制御する。また 、 RFアンプ 53aから入力される RF信号は、アナログ Zデジタル変換を行い、音声信 号処理部 55へ出力する。ドライバ 54は、サーボ信号処理部 53bから入力された信号 を増幅し、ディスクモータ 51および光ピックアップ 52へ出力する。  [0005] The servo control unit 53 includes an RF amplifier 53a and a servo signal processing unit 53b. The RF amplifier 53a amplifies the RF signal, which is a signal including the output power tracking error signal and focus error signal of the optical pickup 52 and information stored in the optical disc 59, to a predetermined level and outputs the amplified signal to the servo signal processing unit 53b. The servo signal processing unit 53b controls the optical pickup 52 so that the signal can be accurately read from the optical disc 59 based on the tracking error signal and the focus error signal input from the RF amplifier 53a. Further, the RF signal input from the RF amplifier 53 a is subjected to analog Z-digital conversion and output to the audio signal processing unit 55. The driver 54 amplifies the signal input from the servo signal processing unit 53b and outputs the amplified signal to the disk motor 51 and the optical pickup 52.
[0006] 音声信号処理部 55は、サーボ信号処理部 53bから入力されたデジタル信号を音 声信号に復調し DAコンバータ 56へ出力する。 DAコンバータ 56は、音声信号処理 部 55から入力されたデジタル信号をアナログ信号に変換し音声出力端子 57から出 力する。マイクロコンピュータ 58は、再生や停止などの各動作における光ディスク再 生装置 50全体の制御を行う。 [0006] The audio signal processing unit 55 outputs the digital signal input from the servo signal processing unit 53b as a sound. Demodulate to voice signal and output to DA converter 56. The DA converter 56 converts the digital signal input from the audio signal processing unit 55 into an analog signal and outputs the analog signal from the audio output terminal 57. The microcomputer 58 controls the entire optical disc reproducing device 50 in each operation such as reproduction and stop.
[0007] 次に、以上の構成力もなる光ディスク再生装置 50において、光ディスク 59をセットし て力も再生がスタートするまでのフローチャートを図 2を参照して説明する。  [0007] Next, with reference to FIG. 2, a flowchart from the setting of the optical disc 59 to the start of playback of the force in the optical disc playback apparatus 50 having the above-described configuration power will be described.
[0008] まず、ステップ S50において、光ディスク再生装置 50に光ディスク 59がセットされた か否かを判断する。セットされた場合 (YESの場合)ステップ S51に進み、セットされ て 、な 、場合 (NOの場合）は再度判断する。  [0008] First, in step S50, it is determined whether or not the optical disk 59 is set in the optical disk reproducing device 50. If it is set (in the case of YES), proceed to step S51.
[0009] 次に、ステップ S51において、ディスクモータ 51が起動し光ディスク 59を回転させ てステップ S 52に進む。  [0009] Next, in step S51, the disk motor 51 is activated to rotate the optical disk 59, and the process proceeds to step S52.
[0010] 次に、ステップ S52において、光ピックアップ 52の半導体レーザを点灯させ、レー ザ光を光ディスク 59に照射する。そして、光ピックアップ 52を移動させ反射光を受光 できる位置まで引き込み、その反射光を光ピックアップ 52の受光器で受光し、トラツキ ングエラー信号やフォーカスエラー信号および RF信号を生成して RFアンプ 53a経 由でサーボ信号処理部 53bへ入力する。サーボ信号処理部 53bは、光ディスク 59が 光ディスク再生装置 50で再生可能なディスク力否か判別を行い再生可能なディスク の場合はステップ S53に進み、再生不可能なディスクの場合は終了する。  [0010] Next, in step S52, the semiconductor laser of the optical pickup 52 is turned on to irradiate the optical disc 59 with laser light. Then, the optical pickup 52 is moved to a position where the reflected light can be received, and the reflected light is received by the optical pickup 52 receiver to generate a tracking error signal, a focus error signal, and an RF signal to pass through the RF amplifier 53a. To input to the servo signal processor 53b. The servo signal processing unit 53b determines whether or not the optical disc 59 is a disc that can be played back by the optical disc playback device 50. If the disc is a disc that can be played, the process proceeds to step S53.
[0011] 次に、ステップ S53において、サーボ信号処理部 53bがフォーカスサーボを動作可 能な状態、すなわち本ステップ以降フォーカスエラー信号に基づ 、てフォーカスが合 焦するように光ピックアップ 52を動作させるようにしてステップ S54に進む。  [0011] Next, in step S53, the servo signal processing unit 53b is in a state in which the focus servo can be operated, that is, based on the focus error signal after this step, the optical pickup 52 is operated so as to focus. Thus, the process proceeds to step S54.
[0012] 次に、ステップ S54において、サーボ信号処理部 53bがトラッキングエラー信号に 基づいてトラッキングバランスの調整を行い、トラッキング方向の読み取りが最適な状 態となるように調整して、ステップ S55に進む。  [0012] Next, in step S54, the servo signal processing unit 53b adjusts the tracking balance based on the tracking error signal, adjusts the reading in the tracking direction to be in an optimum state, and proceeds to step S55. .
[0013] 次に、ステップ S55において、サーボ信号処理部 53bがトラッキングサーボを動作 可能な状態、すなわち本ステップ以降トラッキングエラー信号に基づいてトラックに追 従するように光ピックアップ 52を動作させるようにしてステップ S56に進む。  [0013] Next, in step S55, the servo signal processing unit 53b can operate the tracking servo, that is, the optical pickup 52 is operated so as to follow the track based on the tracking error signal after this step. Proceed to step S56.
[0014] 次に、ステップ S56において、サーボ信号処理部 53bがフォーカスバランスの調整 およびトラッキングゲインおよびフォーカスゲインの調整を行 ヽ、光ディスク 59から最 適に情報の読み取りが可能となる状態となるようにした後ステップ S57に進む。 [0014] Next, in step S56, the servo signal processing unit 53b adjusts the focus balance. Then, after adjusting the tracking gain and the focus gain so that information can be read optimally from the optical disk 59, the process proceeds to step S57.
[0015] 次に、ステップ S57において光ディスク 59から光ディスク 59に記録されている情報 の読み込みを開始する。すなわち再生を開始し、ステップ S 58に進む。 Next, in step S57, reading of information recorded on the optical disk 59 from the optical disk 59 is started. That is, playback is started and the process proceeds to step S58.
[0016] 次に、ステップ S58において再生が停止した力否かを判断する。再生が停止した場 合 (YESの場合）はステップ S59に進み、再生が停止していない場合 (NOの場合） は再度判断する。 [0016] Next, in step S58, it is determined whether or not the reproduction has stopped. If playback has stopped (YES), go to step S59, and if playback has not stopped (NO), determine again.
[0017] 次に、ステップ S59において再生が再開された力否かを判断する。再生が再開され た場合はステップ S51に戻り、再生が再開されていない場合はステップ S60に進む。  Next, in step S59, it is determined whether or not the force has been resumed. If playback has been resumed, the process returns to step S51. If playback has not been resumed, the process proceeds to step S60.
[0018] 次に、ステップ S60において光ディスク 59が排出された力否かを判断する。排出さ れた場合 (YESの場合）は終了し、排出されない場合 (NOの場合）はステップ S59に 戻る。  Next, in step S60, it is determined whether or not the optical disk 59 has been ejected. If it is discharged (in the case of YES), the process ends. If it is not discharged (in the case of NO), the process returns to step S59.
[0019] 上述した動作では、光ディスク 59をセットして力 再生が開始されるまでに時間が 力かるという問題がある。その問題を解決するために、光ピックアップの調整値を予め 再生装置内に記憶しておき、再生時にはその値を用いることで調整に時間をかけず に再生までの時間の短縮を図れる特許文献 1記載の装置が提案されている。  [0019] The above-described operation has a problem that it takes time until the optical disk 59 is set and force reproduction is started. In order to solve the problem, the adjustment value of the optical pickup is stored in advance in the reproduction apparatus, and the value can be used during reproduction to shorten the time until reproduction without taking time for adjustment. The described apparatus has been proposed.
特許文献 1：特開平 5— 242504号公報  Patent Document 1: Japanese Patent Laid-Open No. 5-242504
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0020] 特許文献 1に記載の装置では、予め機器に記憶した値を用いるため、再生する光 ディスクによっては最適な状態での再生が行えない場合があり、その結果音質や画 質が低下したり正常な再生が行えないことがあった。 [0020] Since the device described in Patent Document 1 uses values stored in the device in advance, depending on the optical disc to be played, there may be cases where playback in an optimal state cannot be performed, resulting in a decrease in sound quality and image quality. Normal playback may not be possible.
[0021] そこで、本発明は、例えば光ディスク再生装置において、光ディスクに記録された 情報が再生される (音声などが再生される)までの時間を短縮でき、かつ精度良く再 生可能とする光ディスク再生装置および再生方法を提供することを課題とする。 課題を解決するための手段 [0021] Therefore, the present invention provides an optical disc playback device that can shorten the time until information recorded on the optical disc is played back (sound is played back) and can be played back with high accuracy, for example, in an optical disc playback device. It is an object to provide an apparatus and a reproduction method. Means for solving the problem
[0022] 上記課題を解決するために、請求項 1に記載の発明は、情報が記録された光ディ スクに対しレーザ光を照射し、前記光ディスクからの反射光により信号を得る光ピック アップと、前記光ピックアップが得た信号に基づ 、て前記光ピックアップをフォーカス 方向及びトラッキング方向へ駆動するための制御を行うサーボ制御手段と、前記サ ーボ制御手段の各種調整を行う調整手段と、前記調整手段が各種調整を行うために 必要な信号を記録する記録手段と、前記光ディスクに記録された情報を再生する再 生手段と、前記反射光を受光すべく前記サーボ制御手段を起動させるとともに前記 反射光により得られる信号力 前記調整手段が各種調整を行うために必要な信号を 前記記録手段に記録させ、そして、前記サーボ制御手段の起動に伴い得られる信号 を基に前記再生手段による情報の再生を開始させるとともに前記情報の再生と並行 して前記記録手段に記録された必要な信号を用いて前記調整手段による各種調整 を行わせる制御手段と、を備えたことことを特徴として 、る。 In order to solve the above-mentioned problem, the invention according to claim 1 is an optical pick that irradiates a laser beam to an optical disk on which information is recorded and obtains a signal by reflected light from the optical disk. And servo control means for performing control for driving the optical pickup in a focus direction and tracking direction based on a signal obtained by the optical pickup, and adjustment means for performing various adjustments of the servo control means And a recording means for recording signals necessary for the adjustment means to perform various adjustments, a reproduction means for reproducing information recorded on the optical disc, and a servo control means for receiving the reflected light. And the signal force obtained by the reflected light. The reproducing means records the signals necessary for the adjusting means to perform various adjustments on the recording means, and the signal obtained upon activation of the servo control means. Each of the adjustment means using the necessary signals recorded in the recording means in parallel with the reproduction of the information. And a control means for performing seed adjustment.
[0023] 請求項 2記載の発明は、情報が記録された光ディスクに対しレーザ光を照射し、前 記光ディスクからの反射光により信号を得る光ピックアップと、前記光ピックアップが 得た信号に基づいて前記光ピックアップをフォーカス方向及びトラッキング方向へ駆 動するための制御を行うサーボ制御手段と、前記サーボ制御手段の各種調整を行う 調整手段と、前記光ディスクに記録された情報を格納する情報格納手段と、前記光 ディスクに記録された情報を再生する再生手段と、前記反射光を受光すべく前記サ ーボ制御手段を起動させ、そして、前記サーボ制御手段の起動に伴い得られる信号 を基に前記光ピックアップに前記光ディスクから再生速度よりも速い速度で前記情報 を読み出させ、読み出された前記情報を前記情報記憶手段に記憶するとともに前記 再生手段に前記情報の再生を開始させ、前記情報記憶手段に所定量前記情報が 記憶されたら、前記光ディスクからの情報読み出しを停止させ、前記再生手段に前 記情報記憶手段から読み出した前記情報を再生させるとともに並行して前記調整手 段による各種調整を行わせる制御手段と、を備えたことを特徴としている。  The invention according to claim 2 is based on an optical pickup that irradiates an optical disc on which information is recorded with laser light and obtains a signal by reflected light from the optical disc, and a signal obtained by the optical pickup. Servo control means for performing control for driving the optical pickup in the focus direction and tracking direction, adjustment means for performing various adjustments of the servo control means, and information storage means for storing information recorded on the optical disc; And reproducing means for reproducing the information recorded on the optical disc; and activating the servo control means to receive the reflected light; and based on a signal obtained upon activation of the servo control means. The optical pickup is caused to read the information from the optical disc at a speed faster than the reproduction speed, and the read information is recorded in the information storage means. At the same time, the reproduction unit starts reproduction of the information, and when the information storage unit stores the predetermined amount of information, reading of the information from the optical disc is stopped, and the reproduction unit reads out the information from the information storage unit. Control means for reproducing the information and performing various adjustments by the adjusting means in parallel.
[0024] 請求項 5記載の発明は、情報が記録された光ディスクに対しレーザ光を照射し、前 記光ディスクからの反射光により信号を得て、前記信号に基づいて前記光ディスクに 記録されて！ヽる情報を正確に読み取れるように制御する光ディスク再生方法にぉ 、 て、前記反射光を受光するとともに前記反射光により得られる信号力 各種調整を行 うために必要な信号を記録し、そして、前記反射光の受光に伴い得られる信号を基 に情報の再生を開始させるとともに前記情報の再生と並行して記録された前記必要 な信号を用いて各種調整を行うことを特徴として 、る。 [0024] According to the invention of claim 5, the optical disk on which information is recorded is irradiated with laser light, a signal is obtained from the reflected light from the optical disk, and the signal is recorded on the optical disk based on the signal! In the optical disk reproducing method for controlling the information to be read accurately, the reflected light is received and the signal force obtained by the reflected light is recorded, and signals necessary for various adjustments are recorded, and Based on the signal obtained by receiving the reflected light. In addition, the reproduction of information is started and various adjustments are performed using the necessary signals recorded in parallel with the reproduction of the information.
[0025] 請求項 6記載の発明は、情報が記録された光ディスクに対しレーザ光を照射し、前 記光ディスクからの反射光により信号を得て、前記信号に基づいて前記光ディスクに 記録されて！ヽる情報を正確に読み取れるように制御する光ディスク再生方法にぉ 、 て、前記光ディスクから再生速度よりも速い速度で前記情報を読み出し、読み出され た前記情報を記憶するとともに前記情報の再生を開始させ、所定量前記情報が記憶 されたら、前記光ディスクからの情報読み出しを停止させ、記憶した前記情報を再生 するとともに並行して各種調整を行うことを特徴としている。  [0025] According to the invention of claim 6, the optical disk on which information is recorded is irradiated with laser light, a signal is obtained from the reflected light from the optical disk, and the signal is recorded on the optical disk based on the signal! According to an optical disc reproducing method for controlling the read information to be read accurately, the information is read from the optical disc at a speed higher than the reproduction speed, the read information is stored, and the reproduction of the information is started. When a predetermined amount of the information is stored, reading of information from the optical disk is stopped, the stored information is reproduced, and various adjustments are performed in parallel.
図面の簡単な説明  Brief Description of Drawings
[0026] [図 1]従来技術の光ディスク再生装置のブロック図である。 FIG. 1 is a block diagram of a conventional optical disc playback apparatus.
[図 2]図 1に示された再生装置のディスク挿入カゝら再生までの動作を示したフローチヤ ートである。  FIG. 2 is a flowchart showing the operation from the disc insertion cover to the playback of the playback device shown in FIG.
[図 3]本発明の第 1の実施例に力かる CDプレーヤのブロック図である。  FIG. 3 is a block diagram of a CD player according to the first embodiment of the present invention.
[図 4]図 3に示された CDプレーヤ内の光ピックアップの受光器の説明図である。  4 is an explanatory diagram of a light receiver of the optical pickup in the CD player shown in FIG.
[図 5] (a)、（b)ともにトラッキングエラー信号、フォーカスエラー信号それぞれの波形 の説明図である。  [FIG. 5] Both (a) and (b) are explanatory diagrams of the waveforms of the tracking error signal and the focus error signal.
[図 6]図 3に示された CDプレーヤのディスク挿入力 再生までの動作を示したフロー チャートの一の部分である。  FIG. 6 is a part of a flow chart showing the operation up to the disc insertion force reproduction of the CD player shown in FIG.
[図 7]図 3に示された CDプレーヤのディスク挿入力 再生までの動作を示したフロー チャートの他の部分である。  FIG. 7 is another part of the flow chart showing the operation up to the disc insertion force reproduction of the CD player shown in FIG. 3.
[図 8]本発明の第 2の実施例に力かる CDプレーヤのブロック図である。  FIG. 8 is a block diagram of a CD player that works on the second embodiment of the present invention.
[図 9]図 8に示された CDプレーヤのディスク挿入力 再生までの動作を示したフロー チャートの一の部分である。  FIG. 9 is a part of a flow chart showing the operation up to the disc insertion force reproduction of the CD player shown in FIG.
[図 10]図 8に示された CDプレーヤのディスク挿入から再生までの動作を示したフロー チャートの他の部分である。  FIG. 10 is another part of the flowchart showing the operation from disc insertion to playback of the CD player shown in FIG. 8.
符号の説明  Explanation of symbols
[0027] 1 CDプレーヤ（光ディスク再生装置） 3 光ピックアップ [0027] 1 CD player (optical disk playback device) 3 Optical pickup
4 サーボ制御部 (サーボ制御手段、調整手段、制御手段、設定手段） 4 Servo control unit (servo control means, adjustment means, control means, setting means)
4a RFアンプ 4a RF amplifier
4b サーボ信号処理部 (調整手段、制御手段、設定手段）  4b Servo signal processing section (Adjustment means, control means, setting means)
5 バッファ (記録手段、保存手段）  5 Buffer (Recording means, storage means)
7 音声信号処理部 (再生手段）  7 Audio signal processor (reproduction means)
11 CD (光ディスク）  11 CD (optical disc)
20 再生情報用バッファ (情報記憶手段）  20 Playback information buffer (information storage means)
S4 トラッキングエラー信号レベル、フォーカスエラー信号レベルをバッファへ 格納 (記憶手段）  S4 Tracking error signal level and focus error signal level are stored in the buffer.
S5 フォーカスサーボ ON  S5 Focus servo ON
S6 トラッキングサーボ ON  S6 Tracking servo ON
S7 再生開始  S7 Start playback
S9 トラッキングバランス調整 (調整手段）  S9 Tracking balance adjustment (Adjustment method)
S10 フォーカスバランス調整（調整手段）  S10 Focus balance adjustment (adjustment means)
S11 トラッキングゲイン、フォーカスゲイン調整  S11 Tracking gain and focus gain adjustment
S12 調整値保存 (保存手段）  S12 Adjustment value storage (storage method)
S16 調整値設定 (設定手段）  S16 Adjustment value setting (setting method)
S9' トラッキングバランス調整 (調整手段）  S9 'Tracking balance adjustment (Adjustment method)
S10' フォーカスバランス調整（調整手段）  S10 'Focus balance adjustment (adjustment means)
S20 再生情報用バッファへ格納開始  S20 Start storing in playback information buffer
発明を実施するための最良の形態 BEST MODE FOR CARRYING OUT THE INVENTION
以下、本発明の一実施形態を説明する。本発明の一実施形態にカゝかる光ディスク 再生装置は、光ピックアップを制御するサーボ制御手段を起動させるとともに光ディ スクの反射光力 得られる信号力 調整手段が各種調整を行うために必要な信号を 記録手段に記録し、前記サーボ制御手段の起動に伴い得られる信号を基に再生手 段による情報の再生を開始させるとともに、前記情報の再生と並行して前記記録手 段に記録された必要な情報を用いて調整手段が調整を行う。このようにすることによ つて、再生前には必要な情報のみを記録しておいて、調整は光ディスク力 情報の 再生を始めた後に行うので光ディスクをセットして力 光ディスクに記録された情報が 再生されるまでの時間が短縮でき、かつ精度良く再生することができる。 Hereinafter, an embodiment of the present invention will be described. An optical disk reproducing apparatus according to an embodiment of the present invention activates a servo control means for controlling an optical pickup and a signal necessary for the signal power adjusting means to obtain a reflected light power of the optical disk to perform various adjustments. Is recorded in the recording means, and information reproduction by the reproduction means is started based on a signal obtained when the servo control means is activated, and recorded in the recording means in parallel with the reproduction of the information. The adjustment means performs adjustment using such information. By doing this Therefore, only necessary information is recorded before reproduction, and adjustment is performed after the reproduction of information on the optical disk is started. Therefore, the time until the information recorded on the optical disk is reproduced after the optical disk is set is reproduced. It can be shortened and reproduced accurately.
[0029] また、本発明の別の一実施形態に力かる光ディスク再生装置は、光ピックアップを 制御するサーボ制御手段を起動させるとともに、前記光ピックアップが前記光ディスク から再生速度よりも速い速度で前記情報を読み出し、読み出された情報を情報記憶 手段に記憶するとともに再生手段に情報の再生を開始させ、前記情報記憶手段に 所定量情報が記憶されたら、前記光ディスクからの情報の読み出しを停止させ、その 間は前記情報記憶手段から読み出した前記情報を前記再生手段が再生するととも に並行して調整手段が調整を行う。このようにすることによって、情報記憶手段から情 報を読み出している間は、光ピックアップに空き時間ができるので、この間に従来再 生前に行って 、た調整を行うことができ、そのために再生前に必要な情報の記録をし なくても、光ディスクをセットしてカゝら光ディスクに記録された情報が再生されるまでの 時間が短縮でき、かつ精度良く再生することができる。  [0029] Further, an optical disk reproducing apparatus according to another embodiment of the present invention activates servo control means for controlling an optical pickup, and the information is obtained at a speed higher than the reproducing speed of the optical pickup from the optical disk. And reading the information in the information storage means and starting the reproduction of the information in the reproduction means. When a predetermined amount of information is stored in the information storage means, the reading of the information from the optical disk is stopped, In the meantime, the reproduction means reproduces the information read from the information storage means, and the adjustment means adjusts in parallel. In this way, while the information is being read from the information storage means, the optical pickup has a free time, and during this time, the conventional adjustment can be performed before the reproduction. Even without recording necessary information, it is possible to shorten the time until the information recorded on the optical disk is reproduced after the optical disk is set, and the information can be reproduced accurately.
[0030] また、前記記録手段に記録され、前記調整手段が各種調整を行うために必要な信 号はトラッキングエラー信号のレベル、フォーカスエラー信号のレベルとしてもよい。こ のようにすることにより、光ディスクの再生前に記録手段に記録しておくトラッキングェ ラー信号のレベル、フォーカスエラー信号のレベルを基に、前記光ディスクの情報を 再生し始めた後に調整を行うことができる。  [0030] The signal recorded in the recording means and necessary for the adjustment means to perform various adjustments may be a tracking error signal level and a focus error signal level. In this way, adjustment is performed after the information on the optical disk starts to be reproduced based on the level of the tracking error signal and the level of the focus error signal recorded on the recording means before reproducing the optical disk. Can do.
[0031] また、前記調整手段により調整されたサーボ制御手段の調整値を保存する保存手 段と、一度前記光ディスクから情報の再生を停止した後に再度前記光ディスクから情 報の再生を開始するときは前記保存手段に保存した前記調整値を前記サーボ制御 手段へ設定する設定手段とを設けてもよい。このよう〖こすること〖こより、光ディスクに記 録された情報の読み取りの停止後、再度の情報の読み取りの際に調整を行う必要が 無 、ため、光ディスクに記録された情報の読み取りまでの時間が短縮できる。  [0031] Also, a storage means for saving the adjustment value of the servo control means adjusted by the adjustment means, and when the information reproduction from the optical disk is started again after the information reproduction from the optical disk is once stopped A setting means for setting the adjustment value stored in the storage means to the servo control means may be provided. From this point of view, there is no need to make adjustments when reading information recorded on the optical disc again after reading of the information recorded on the optical disc is stopped. Can be shortened.
[0032] また、本発明の一実施形態にかかる光ディスク再生方法は、前記反射光を受光す るとともに前記反射光により得られる信号力 各種調整を行うために必要な信号を記 録させ、そして、前記反射光の受光に伴い得られる信号を基に情報の再生を開始さ せるとともに前記情報の再生と並行して記録された前記必要な信号を用いて各種調 整を行う。このようにすることによって、再生前には必要な情報のみを記録しておいて 、調整は光ディスク力 情報を再生し始めた後に行うので光ディスクをセットしてから 光ディスクに記録された情報を再生し始めるまでの時間が短縮でき、かつ精度良く再 生することができる。 [0032] Further, in the optical disc reproducing method according to an embodiment of the present invention, the reflected light is received and the signal force obtained by the reflected light is recorded, and signals necessary for performing various adjustments are recorded, and Information reproduction is started based on the signal obtained by receiving the reflected light. Various adjustments are made using the necessary signals recorded in parallel with the reproduction of the information. In this way, only necessary information is recorded before reproduction, and adjustment is performed after the reproduction of the optical disc power information. Therefore, the information recorded on the optical disc is reproduced after setting the optical disc. Time to start can be shortened and can be played back with high accuracy.
[0033] また、本発明の別の一実施形態に力かる光ディスク再生方法は、前記光ディスクか ら再生速度よりも速い速度で前記情報を読み出して、読み出された前記情報を記憶 するとともに前記情報の再生を開始させ、所定量前記情報が記憶されたら、前記光 ディスクからの情報読み出しを停止させ、記憶した前記情報を再生するとともに並行 して各種調整を行う。このようにすることによって、記憶された情報を読み出している 間は、光ディスク力 の読み出しを行わない空き時間ができるので、この間に従来再 生前に行って 、た調整を行うことができ、そのために再生前に必要な情報の記録をし なくても、光ディスクをセットしてカゝら光ディスクに記録された情報が再生されるまでの 時間が短縮でき、かつ精度良く再生することができる。  [0033] Further, an optical disc reproducing method according to another embodiment of the present invention reads the information from the optical disc at a speed higher than a reproducing speed, stores the read information, and stores the information. When a predetermined amount of the information is stored, reading of information from the optical disk is stopped, the stored information is reproduced, and various adjustments are performed in parallel. In this way, while the stored information is being read out, there is a free time during which the optical disc power is not read out. Even if the necessary information is not recorded before the reproduction, the time from setting the optical disc to reproducing the information recorded on the optical disc can be shortened and reproduced accurately.
[0034] また、トラッキングエラー信号のレベル、フォーカスエラー信号のレベルを前記光デ イスクの反射光より得られバランスやゲイン等の各種調整を行うために記録する前記 必要な信号としてもよい。このようにすることにより、光ディスク再生前に記録しておくト ラッキングエラー信号のレベル、フォーカスエラー信号のレベルを基に、前記光ディ スクカも情報を再生し始めた後に調整を行うことができる。  [0034] Further, the level of the tracking error signal and the level of the focus error signal may be obtained from the reflected light of the optical disk, and may be the necessary signals to be recorded for performing various adjustments such as balance and gain. By doing so, the optical disc player can make an adjustment after starting to reproduce the information on the basis of the level of the tracking error signal and the level of the focus error signal recorded before reproducing the optical disc.
[0035] また、調整を行った前記調整値を保存し、一度前記光ディスクから情報の再生を停 止した後に再度前記光ディスクから情報の再生を開始するときは、保存した前記調 整値を設定して情報の再生を行ってもよい。このようにすることにより、光ディスクから の情報の再生の停止後、再度の情報の再生の際に調整を行う必要が無いため、光 ディスクに記録された情報の読み取りまでの時間が短縮できる。  [0035] In addition, when the adjustment value that has been adjusted is stored and the reproduction of information from the optical disc is once stopped after the reproduction of information from the optical disc is once stopped, the saved adjustment value is set. Information may be reproduced. By doing so, it is not necessary to make an adjustment when reproducing information again after the reproduction of information from the optical disk is stopped, so that the time until reading the information recorded on the optical disk can be shortened.
実施例 1  Example 1
[0036] 本発明の第 1の実施例に力かる光ディスク再生装置としての CD (Compact Disc)プ レーャ 1を図 3ないし図 7を参照して説明する。 CDプレーヤ 1は、図 3に示すようにデ イスクモータ 2と、光ピックアップ 3と、サーボ制御部 4と、ノ ッファ 5と、ドライバ 6と、音 声信号処理部 7と、 DAコンバータ 8と、音声信号出力端子 9と、マイクロコンピュータ 1 0とを備えている。 [0036] A CD (Compact Disc) player 1 as an optical disk reproducing apparatus useful for the first embodiment of the present invention will be described with reference to Figs. As shown in FIG. 3, the CD player 1 includes a disk motor 2, an optical pickup 3, a servo control unit 4, a nother 5, a driver 6, and a sound. A voice signal processing unit 7, a DA converter 8, a voice signal output terminal 9, and a microcomputer 10 are provided.
[0037] ディスクモータ 2は、 CDプレーヤ 1にセットされた光ディスクとしての CD11を回転さ せるためのモータであり、スピンドルモータなどで構成されて 、る。  [0037] The disc motor 2 is a motor for rotating the CD 11 as an optical disc set in the CD player 1, and includes a spindle motor or the like.
[0038] 光ピックアップ 3は、 CD11に照射する光を発生させる図示しない半導体レーザや C D11上に光を照射するためのレンズ、フォーカスやトラッキングを合わせるためのァク チユエータおよび CD11から反射された光を受ける受光器 30とを備え、受光器 30の 出力からトラッキングエラー信号やフォーカスエラー信号をおよび CD11から読み取 つた情報を含む信号である RF信号を生成し出力する。  [0038] The optical pickup 3 includes a semiconductor laser (not shown) that generates light to be irradiated on the CD 11, a lens for irradiating the light on the CD 11, an actuator for adjusting the focus and tracking, and the light reflected from the CD 11. Receiver 30 that receives the signal, and generates and outputs a tracking error signal and a focus error signal from the output of the light receiver 30 and an RF signal including information read from the CD 11.
[0039] 受光器 30は図 4に示すように、 4分割受光器 31と 4分割受光器を挟んで CD11のト ラック方向に配される一対の受光器 32と 33とから構成される。 4分割受光器 31は受 光面 31a、 31b、 31c、 31d力ら構成される。  As shown in FIG. 4, the light receiver 30 includes a four-divided light receiver 31 and a pair of light receivers 32 and 33 arranged in the track direction of the CD 11 with the four-divided light receiver interposed therebetween. The four-divided light receiver 31 includes light receiving surfaces 31a, 31b, 31c, and 31d.
[0040] トラッキングエラー信号は受光器 32と 33の光量差による周知の 3ビーム法により生 成され図 5 (a)に示す波形となる。フォーカスエラー信号は 4分割受光器 31において 一方の対角位置にある受光面 31aおよび 31cの出力を加算したものから、他方の対 角位置にある受光面 31bおよび 31dの出力を加算したものを減算して生成し (すなわ ち（31a+ 31c)— (31b + 31d) )、図 5 (b)に示す波形となる。また、 RF信号は 4分割 受光器の全受光面 31a、 31b、 31c、 31dの出力を加算したものである。  [0040] The tracking error signal is generated by the well-known three-beam method based on the light quantity difference between the light receivers 32 and 33, and has the waveform shown in FIG. 5 (a). The focus error signal is subtracted from the sum of the outputs of the light receiving surfaces 31a and 31c at one diagonal position in the quadrant receiver 31 and the output of the light receiving surfaces 31b and 31d at the other diagonal position. (Ie (31a + 31c) — (31b + 31d)), and the waveform shown in Fig. 5 (b) is obtained. The RF signal is the sum of the outputs from all the light receiving surfaces 31a, 31b, 31c, and 31d of the quadrant receiver.
[0041] サーボ制御手段、調整手段、制御手段、設定手段としてのサーボ制御部 4は、 RF アンプ 4aとサーボ信号処理部 4bと力も構成される。 RFアンプ 4aは、光ピックアップ 3 力 出力される信号を所定の値に増幅し、サーボ信号処理部 4bへ出力する。調整手 段、制御手段、設定手段としてのサーボ信号処理部 4bは、 CPU (Central Processing Unit)と、 RAM (Random Access Memory)と、 ROM (Read Only Memory)を内蔵し、 RFアンプ 4aから入力されるトラッキングエラー信号とフォーカスエラー信号に基づい て光ピックアップ 3のフォーカスおよびトラッキングの制御や後述する各種調整などを ROMに記録された制御プログラムにより行 、、 CD11に記録された情報を正確に読 めるようにする。さらに、 CD 11に記録された情報を含む RF信号をアナログ Zデジタ ル変換して音声信号処理部 7へ出力する。また、サーボ信号処理部 4bは RFアンプ 4 aから入力される光ピックアップ 3から得られた信号としてのトラッキングエラー信号、フ オーカスエラー信号力 各種調整を行うために必要な信号としてのトラッキングエラー 信号のレベル、フォーカスエラー信号のレベルを取得し、バッファ 5へ格納する。 The servo control unit 4 as servo control means, adjustment means, control means, and setting means is also configured with an RF amplifier 4a and a servo signal processing unit 4b. The RF amplifier 4a amplifies the signal output from the optical pickup 3 to a predetermined value and outputs it to the servo signal processing unit 4b. The servo signal processing unit 4b as an adjustment means, control means, and setting means contains a CPU (Central Processing Unit), RAM (Random Access Memory), and ROM (Read Only Memory), and is input from the RF amplifier 4a. Based on the tracking error signal and focus error signal, the focus and tracking control of the optical pickup 3 and various adjustments described later can be performed by the control program recorded in the ROM, and the information recorded on the CD 11 can be read accurately. Like that. Further, the RF signal including the information recorded on CD 11 is converted into an analog Z digital signal and output to the audio signal processing unit 7. The servo signal processor 4b is an RF amplifier 4 Tracking error signal and focus error signal strength as signals obtained from optical pickup 3 input from a Acquire tracking error signal level and focus error signal level as signals necessary for various adjustments, Store in buffer 5.
[0042] トラッキングエラー信号のレベルとは、図 5 (a)の VIと V2の値を示し、フォーカスェ ラー信号のレベルは図 5 (b)の V3と V4の値をそれぞれ示す。 [0042] The level of the tracking error signal indicates the values of VI and V2 in Fig. 5 (a), and the level of the focus error signal indicates the values of V3 and V4 in Fig. 5 (b), respectively.
[0043] 記録手段、保存手段としてのバッファ 5は、 RAMで構成され、サーボ信号処理部 4 bで取得した各種調整を行うために必要な信号としてのトラッキングエラー信号のレべ ル、フォーカスエラー信号のレベルを記録する。また、サーボ信号処理部 4bで調整さ れた際の調整値も記録し保存する。 [0043] The buffer 5 as a recording means and a storage means is composed of a RAM, and includes a tracking error signal level and a focus error signal as signals necessary for performing various adjustments acquired by the servo signal processing unit 4b. Record the level. Also, record and save the adjustment value when adjusted by the servo signal processor 4b.
[0044] ドライバ 6は、サーボ信号処理部 4bから入力された信号を増幅し、ディスクモータ 2 および光ピックアップ 3へ出力する。 The driver 6 amplifies the signal input from the servo signal processing unit 4b and outputs the amplified signal to the disk motor 2 and the optical pickup 3.
[0045] 再生手段としての音声信号処理部 7は、サーボ信号処理部 4bから入力されたデジ タル信号を音声信号に復調しエラー訂正などを行った後 DAコンバータ 8へ出力する [0045] The audio signal processing unit 7 as a reproduction means demodulates the digital signal input from the servo signal processing unit 4b into an audio signal, performs error correction, and outputs the audio signal to the DA converter 8.
[0046] DAコンバータ 8は、音声信号処理部 7から入力されたデジタル信号をアナログ信 号に変換し音声信号出力端子 9から出力する。 The DA converter 8 converts the digital signal input from the audio signal processing unit 7 into an analog signal and outputs the analog signal from the audio signal output terminal 9.
[0047] マイクロコンピュータ 10は、 CD11のセットや排出、再生や停止などの各動作にお ける CDプレーヤ 1全体の制御を行う。  [0047] The microcomputer 10 controls the entire CD player 1 in each operation such as setting, ejecting, playing, and stopping the CD 11.
[0048] 次に、このような構成からなる CDプレーヤ 1において、 CD11をセットして CD11か ら情報を再生するまでの動作の制御を図 6および図 7に示すフローチャートを参照し て説明する。図 6および図 7に示したフローチャートは、サーボ信号処理部 4bの RO Mに記録されている制御プログラムをサーボ信号処理部 4bの CPUが実行することで 実現される。  [0048] Next, in the CD player 1 having such a configuration, control of operations from setting the CD 11 to reproducing information from the CD 11 will be described with reference to the flowcharts shown in Figs. The flowcharts shown in FIGS. 6 and 7 are realized by the CPU of the servo signal processing unit 4b executing the control program recorded in the ROM of the servo signal processing unit 4b.
[0049] まず、ステップ S1において、 CDプレーヤ 1に CD11がセットされているか否か判断 し、セットされている場合 (YESの場合）はステップ S2に進み、セットされていない場 合 (NOの場合）は再度判断する。  [0049] First, in step S1, it is determined whether or not CD11 is set in CD player 1. If it is set (YES), the process proceeds to step S2, and if it is not set (NO) ) Again.
[0050] 次に、ステップ S2において、ディスクモータ 2をドライノく 6経由で起動し CD11を回 転させてステップ S 3に進む。 [0051] 次に、ステップ S3において、光ピックアップ 3の半導体レーザを点灯させ、光ピック アップ 3を移動させて反射光を受光できる位置まで引き込む。そうすると、レーザ光が CD11に照射され、その反射光が受光器 30で受光されて、その結果得られた信号が RFアンプ 4a経由でサーボ信号処理部 4bへ入力される。サーボ信号処理部 4bは、 入力された信号に基づいて CD11が CDプレーヤ 1で再生可能なディスクか否か判 別を行 、再生可能なディスクの場合はステップ S4に進み、再生不可能なディスクの 場合は終了する。 [0050] Next, in step S2, the disk motor 2 is started via the dry motor 6 to rotate the CD 11, and the process proceeds to step S3. [0051] Next, in step S3, the semiconductor laser of the optical pickup 3 is turned on, and the optical pickup 3 is moved to a position where the reflected light can be received. Then, the laser beam is irradiated on the CD 11, the reflected light is received by the light receiver 30, and the resulting signal is input to the servo signal processing unit 4b via the RF amplifier 4a. The servo signal processing unit 4b determines whether the CD 11 is a disc that can be played by the CD player 1 based on the input signal. If the disc is a playable disc, the process proceeds to step S4. If it ends.
[0052] 次に、記録手段としてのステップ S4において、各種調整を行うために必要な信号と してのトラッキングエラー信号のレベル、フォーカスエラー信号のレベルをサーボ信 号処理部 4bに入力されたトラッキングエラー信号、フォーカスエラー信号力 取得し てバッファ 5へ格納し、ステップ S5に進む。  [0052] Next, in step S4 as a recording means, the tracking error signal level and the focus error signal level as signals necessary for performing various adjustments are input to the servo signal processing unit 4b. Acquire error signal and focus error signal strength, store them in buffer 5, and proceed to step S5.
[0053] 次に、ステップ S 5において、フォーカスサーボを動作可能な状態、すなわち、本ス テツプ以降フォーカスエラー信号に基づいて常にフォーカス方向のサーボを動作さ せる、すなわち焦点を合わせる動作を行わせる状態としてステップ S6に進む。  [0053] Next, in step S5, the focus servo can be operated, that is, the servo in the focus direction is always operated based on the focus error signal after this step, that is, the operation for focusing is performed. Proceed to step S6.
[0054] 次に、ステップ S6において、トラッキングサーボを動作可能な状態、すなわち、本ス テツプ以降トラッキングエラー信号に基づいて常にトラッキング方向のサーボを動作さ せる、トラックへの追従動作を行わせる状態としてステップ S7に進む。  [0054] Next, in step S6, the tracking servo can be operated, that is, the servo in the tracking direction is always operated based on the tracking error signal after this step. Proceed to step S7.
[0055] 次に、ステップ S 7において CD 11に記録されている情報の再生を始めステップ S8 に進む。まず、 CD 11の TOC (Table Of Contents)力 読み取り始め、次に音楽など の情報を読み取り再生する。光ピックアップ 3から RFアンプ 4a経由でサーボ信号処 理部 4bへ入力された TOCや音楽などの情報を含む RF信号はアナログ Zデジタル 変換され音声信号処理部 7へ出力する。音声信号処理部 7では音声信号に復調し エラー訂正を行った後、 DZAコンバータ 8でデジタル Zアナログ変換して音声信号 出力端子 9より出力する。すなわち本ステップ以降 CD11の再生が開始される。  Next, reproduction of information recorded on the CD 11 is started in step S 7 and the process proceeds to step S 8. First, it starts reading the TOC (Table Of Contents) of CD 11, and then reads and plays music and other information. The RF signal containing information such as TOC and music input from the optical pickup 3 via the RF amplifier 4a to the servo signal processing unit 4b is converted to analog Z digital and output to the audio signal processing unit 7. The audio signal processing unit 7 demodulates the audio signal and corrects the error. Then, the DZA converter 8 performs digital Z-analog conversion and outputs it from the audio signal output terminal 9. That is, CD11 playback is started after this step.
[0056] 次に、ステップ S8において、再生がー且停止後再開によるものか否かを判断する。  [0056] Next, in step S8, it is determined whether or not the reproduction is due to restarting after stopping.
再開によるものである場合 (YESの場合）はステップ S 13に進み、再開によるもので ない場合 (NOの場合）はステップ S9に進む。  If it is due to resumption (in the case of YES), the process proceeds to step S13. If it is not due to resumption (in the case of NO), the process proceeds to step S9.
[0057] 次に、調整手段としてのステップ S9において、ノ ッファ 5に格納したトラッキングエラ 一信号のレベルに基づいてトラッキングバランスの調整を行い、 CD11のトラッキング 方向の読み取りが最適になるように調整し、ステップ S10に進む。 [0057] Next, in step S9 as adjusting means, the tracking error stored in the notch 5 is stored. The tracking balance is adjusted based on the level of one signal so that the reading in the tracking direction of CD11 is optimized, and the process proceeds to step S10.
[0058] トラッキングバランスの調整は図 5 (a)における VIと V2の絶対値をほぼ等しくする、 すなわち、図 5 (a)の波形の OVのラインよりも上側と下側の面積がほぼ等しくなるよう にサーボ信号処理部 4bの出力を調整することである。  [0058] Adjusting the tracking balance makes the absolute values of VI and V2 in Fig. 5 (a) almost equal, that is, the areas above and below the OV line of the waveform in Fig. 5 (a) are almost equal. In this way, the output of the servo signal processor 4b is adjusted.
[0059] 次に、調整手段としてのステップ S10において、バッファ 5に格納したフォーカスェ ラー信号のレベルに基づ!/、てフォーカスバランスの調整を行!、、 CD11のフォーカス 方向の読み取りが最適になるように調整し、ステップ S 11に進む。  [0059] Next, in step S10 as an adjustment means, the focus balance is adjusted based on the level of the focus error signal stored in the buffer 5 !, and the reading of the CD11 in the focus direction is optimal. Adjust to step S11 and proceed to step S11.
[0060] フォーカスバランスの調整もトラッキングバランスの調整と同様に図 5 (b)における V 3と V4の絶対値をほぼ等しくする、すなわち、図 5 (b)の波形の OVのラインよりも上側 と下側の面積がほぼ等しくなるようにサーボ信号処理部 4bの出力を調整することであ る。  [0060] Similarly to the tracking balance adjustment, the focus balance adjustment is performed by making the absolute values of V 3 and V4 in FIG. 5 (b) almost equal, that is, above the OV line of the waveform in FIG. 5 (b). The output of the servo signal processing unit 4b is adjusted so that the lower area is almost equal.
[0061] 次に、ステップ S 11〖こおいて、トラッキングゲインおよびフォーカスゲインの調整を行 いステップ S12に進む。本ステップまでの調整を行うことで、 CD11からの情報の読 み取りが最適な状態となる。すなわち、ステップ S9〜ステップ S11により CD11に記 録された情報の読み取りと並行して記録された必要な信号を用いて CD11から最適 に読み取れるように調整を行って 、る。  Next, in step S 11, the tracking gain and the focus gain are adjusted, and the process proceeds to step S 12. By making adjustments up to this step, reading information from CD11 is in an optimal state. That is, adjustment is performed so that the information can be optimally read from the CD 11 using the necessary signals recorded in parallel with the reading of the information recorded on the CD 11 in steps S9 to S11.
[0062] トラッキングゲインおよびフォーカスゲインの調整は次のように行う。まず、サーボ信 号処理部 4bからドライバ 6に出力される信号に所定の周波数の外乱を与える。そうす ると、光ピックアップ 3からこの外乱に影響されたトラッキングエラー信号やフォーカス エラー信号が RFアンプ 4aを経由してサーボ信号処理部 4bに入力される。そして外 乱に影響されたトラッキングエラー信号のレベルおよびフォーカスエラー信号のレべ ルと予めサーボ信号処理部 4b内の ROMに記憶してあるトラッキングエラー信号のレ ベルおよびフォーカスエラー信号のレベルの目標値と比較し、その目標値となるよう に RFアンプ 4aに指示しトラッキングエラー信号およびフォーカスエラー信号のゲイン を調整する。  The tracking gain and focus gain are adjusted as follows. First, a disturbance having a predetermined frequency is applied to the signal output from the servo signal processing unit 4b to the driver 6. Then, the tracking error signal and the focus error signal affected by this disturbance are input from the optical pickup 3 to the servo signal processing unit 4b via the RF amplifier 4a. Then, the tracking error signal level and focus error signal level affected by the disturbance, and the tracking error signal level and focus error signal level target values stored in advance in the ROM in the servo signal processing unit 4b. Compare with, and instruct the RF amplifier 4a to achieve the target value, and adjust the gain of the tracking error signal and focus error signal.
[0063] 次に、保存手段としてのステップ S 12において、ステップ S9〜ステップ S11までに 調整を行った値をバッファ 5に保存し、ステップ S 13に進む。 [0064] 次に、ステップ S13において、再生が停止されたか否かを判断する。再生が停止し た場合 (YESの場合）はステップ S 14に進み、再生が停止されていない場合 (NOの 場合)は再度判断する。 [0063] Next, in step S12 as storage means, the value adjusted in steps S9 to S11 is stored in buffer 5, and the process proceeds to step S13. [0064] Next, in step S13, it is determined whether or not the reproduction is stopped. If playback has stopped (YES), go to step S14, and if playback has not stopped (NO), determine again.
[0065] 次に、ステップ S 14において、再生が再開した力否かを判断する。再生が再開した 場合 (YESの場合）はステップ S16に進み、再生が再開していない場合 (NOの場合 )はステップ S 15に進む。  [0065] Next, in step S14, it is determined whether or not the power has been resumed. If playback has been resumed (YES), the process proceeds to step S16, and if playback has not been resumed (NO), the process proceeds to step S15.
[0066] 次に、ステップ S15において、 CD11が CDプレーヤ 1から排出されたか否かを判断 する。排出された場合は終了し、排出されていない場合はステップ S 14に戻る。  [0066] Next, in step S15, it is determined whether or not the CD 11 is ejected from the CD player 1. If discharged, the process ends. If not discharged, the process returns to step S14.
[0067] 設定手段としてのステップ S 16では、ステップ S 12でバッファ 5に保存した調整値を 読み出してトラッキングバランスとフォーカスバランスおよびトラッキングゲインとフォー カスゲインを RFアンプ 4aやサーボ信号処理部 4bへ設定し、ステップ S5へ戻る。  [0067] In step S16 as setting means, the adjustment values stored in buffer 5 in step S12 are read, and the tracking balance, focus balance, tracking gain, and focus gain are set in the RF amplifier 4a and the servo signal processing unit 4b. Return to step S5.
[0068] このように、ステップ S4でトラッキングエラー信号のレベル、フォーカスエラー信号の レベルをバッファ 5へ格納し、ステップ S7で再生開始後、再生と並行してステップ S9 〜ステップ S 11でトラッキングサーボやフォーカスサーボの調整を行うことができる。  In this manner, the tracking error signal level and the focus error signal level are stored in the buffer 5 in step S4, and after the reproduction is started in step S7, the tracking servo and the tracking servo are performed in steps S9 to S11 in parallel with the reproduction. The focus servo can be adjusted.
[0069] さらに、ステップ S 12で調整した調整値を保存し、ステップ S14で再生再開を検出し 、ステップ S 16で調整値をサーボ制御部 4に設定する。そしてステップ S8で再開によ る再生としてステップ S 13に進むことで、一度 CD11からの読み取りを停止した後に 再度 CD11から情報の読み取りを開始する場合には調整を行わずに再生することが できる。  [0069] Further, the adjustment value adjusted in step S12 is stored, the resumption of reproduction is detected in step S14, and the adjustment value is set in the servo control unit 4 in step S16. Then, by proceeding to step S13 as playback by restarting at step S8, when reading from the CD 11 is stopped once after reading from the CD 11 is started, playback can be performed without adjustment.
[0070] 本実施例によれば、 CD11を再生する際に、サーボ信号処理部 4bの CPUで制御 プログラムを実行させて、トラッキングエラー信号のレベルとフォーカスエラー信号の レベルをバッファ 5に記憶する。そして CD11に記録されて 、る情報を再生し始めた らバッファ 5に記憶したトラッキングエラー信号のレベルとフォーカスエラー信号のレ ベルを基にトラッキングバランス、フォーカスバランスおよびトラッキングゲインおよび フォーカスゲインの調整を行 、CD11から情報の再生が最適になるようにして!/、る。こ のようにすることにより再生前に行っていた調整を再生中に行えるので CD11のセット 力 情報の再生の開始までの時間が短縮される。  According to the present embodiment, when the CD 11 is reproduced, the control program is executed by the CPU of the servo signal processing unit 4 b and the level of the tracking error signal and the level of the focus error signal are stored in the buffer 5. When the information recorded on the CD11 starts to be reproduced, the tracking balance, focus balance, tracking gain and focus gain are adjusted based on the level of the tracking error signal and the level of the focus error signal stored in the buffer 5. , So that information playback from CD11 is optimized! In this way, adjustments made before playback can be performed during playback, so the time required to start playback of CD11 set power information is shortened.
実施例 2 [0071] 次に本発明の第 2の実施例に力かる光ディスク再生装置としての CDプレーヤ 1を 図 8ないし図 10を参照して説明する。なお、前述した第 1の実施例と同一部分には、 同一符号を付して説明を省略する。 Example 2 Next, a CD player 1 as an optical disk reproducing apparatus that is useful in the second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.
[0072] 本実施例は図 8に示すように情報記憶手段としての再生情報用バッファ 20をサー ボ信号処理部 4bと音声信号処理部 7との間に設けて 、る。本実施例では例えば音 飛び対策などのために、次のような再生を行っている。まず、情報の再生に CD11を 倍速で回転させることで CD11から倍速で情報を読み出す。読み出された情報は光 ピックアップ 3から RFアンプ 4aおよびサーボ信号処理部 4bを経由して再生情報用バ ッファ 20に格納されるとともに音声信号処理部 7へも出力され、音声信号処理部 7で は読み出された情報を等倍速で音声信号に復調しエラー訂正などを行った後 DAコ ンバータ 8へ出力する。再生情報用バッファ 20に所定量以上溜まったら音声信号処 理部 7はサーボ信号処理部 4bから直接入力される再生情報ではなく再生情報用バ ッファ 20に格納された情報に切換えて再生情報用バッファ 20から読み出して音声信 号に復調しエラー訂正などを行った後 DAコンバータ 8へ出力する。再生情報用バッ ファ 20が所定量以上になったときは、 CD11からの情報の読み出しが一時停止され 、この間に従来再生前に行っていた各種調整が行える。再生情報用バッファ 20から 情報が読み出されて所定値以下になるとまた CD11から情報の読み出しを始め再生 情報用バッファ 20へ格納する。  In this embodiment, as shown in FIG. 8, a reproduction information buffer 20 as information storage means is provided between the servo signal processing unit 4 b and the audio signal processing unit 7. In the present embodiment, for example, the following reproduction is performed as a measure for skipping sound. First, information is read from CD11 at double speed by rotating CD11 at double speed for information playback. The read information is stored in the reproduction information buffer 20 via the optical pickup 3 via the RF amplifier 4a and the servo signal processing unit 4b, and also output to the audio signal processing unit 7, where the audio signal processing unit 7 The demodulated information is demodulated into audio signals at the same speed and error correction is performed, and then output to the DA converter 8. When a predetermined amount or more is accumulated in the reproduction information buffer 20, the audio signal processing unit 7 switches to the information stored in the reproduction information buffer 20 instead of the reproduction information directly input from the servo signal processing unit 4b, thereby reproducing the reproduction information buffer. Read out from 20, demodulate to audio signal, perform error correction, etc., then output to DA converter 8. When the reproduction information buffer 20 exceeds a predetermined amount, reading of information from the CD 11 is temporarily stopped, and various adjustments that have been performed before reproduction can be performed during this time. When information is read from the reproduction information buffer 20 and falls below a predetermined value, information is read from the CD 11 and stored in the reproduction information buffer 20.
[0073] 図 8に示した構成の CDプレーヤ 1における CD11をセットして CD11から情報を再 生するまでの動作の制御を図 9および図 10に示すフローチャートを参照して説明す る。図 9および図 10に示したフローチャートは、第 1の実施例と同様にサーボ信号処 理部 4bの ROMに記録されている制御プログラムをサーボ信号処理部 4bの CPUが 実行することで実現される。  Control of the operation from setting the CD 11 in the CD player 1 having the configuration shown in FIG. 8 to reproducing information from the CD 11 will be described with reference to the flowcharts shown in FIG. 9 and FIG. The flowchart shown in FIG. 9 and FIG. 10 is realized by the CPU of the servo signal processing unit 4b executing the control program recorded in the ROM of the servo signal processing unit 4b as in the first embodiment. .
[0074] 図 9および図 10に示したフローチャートにおいて第 1の実施例と異なるのは図 9お よび図 10において、ステップ S4を削除したこととステップ S20とステップ S21を追加し たことおよびステップ S9とステップ S 10をそれぞれステップ S9 'とステップ S10 こ変 更したことである。すなわち、ステップ S3でディスク判別を行った後、実施例 1で行つ ていたトラッキングエラー信号のレベルとフォーカスエラー信号のレベルをバッファ 5 に格納せずに、ステップ S5でフォーカスサーボ、ステップ S6でトラッキングサーボを ONにした後にステップ S20を行って、ステップ S7で再生を開始した後にステップ S2 1を行 、、ステップ S8の判断後にステップ S9^とステップ S 1(Τを行う。 [0074] The flowcharts shown in FIGS. 9 and 10 are different from those in the first embodiment in FIG. 9 and FIG. 10 in that step S4 is deleted, step S20 and step S21 are added, and step S9. And Step S10 are changed to Step S9 'and Step S10, respectively. That is, after disc discrimination in step S3, the level of the tracking error signal and the level of the focus error signal used in Example 1 are buffered. After step S5, the focus servo is turned on in step S5, the tracking servo is turned on in step S6, step S20 is performed, playback is started in step S7, step S21 is performed, and step S9 is performed after the determination in step S8. ^ And step S 1
[0075] ステップ S20はステップ S6でトラッキングサーボが ONになった後に、 CD11から倍 速で情報を読み始めて再生情報用バッファ 20へ情報の格納を開始してステップ S7 へ進む。 In step S20, after the tracking servo is turned on in step S6, the information starts to be read from the CD 11 at a double speed, starts storing information in the reproduction information buffer 20, and proceeds to step S7.
[0076] ステップ S7は第 1の実施例と同様であり、ステップ S21は再生情報用バッファ 20に 所定値以上情報が溜まったカゝ否かを判断し、溜まった場合 (YESの場合)は CD11 力 の情報の読み出しを一時停止させステップ S8へ進む。音声信号処理部 7では、 サーボ信号処理部 4bから入力される信号力も再生情報用バッファ 20からの読み出 される信号に切換える。所定量以上溜まっていない場合 (NOの場合）は再度判断す る。  Step S7 is the same as that of the first embodiment, and step S21 determines whether or not information is accumulated in the reproduction information buffer 20 at a predetermined value or more. If it is accumulated (in the case of YES), the CD11 The reading of force information is paused and the process proceeds to step S8. In the audio signal processing unit 7, the signal force input from the servo signal processing unit 4 b is also switched to the signal read from the reproduction information buffer 20. If more than the specified amount has not been accumulated (NO), judge again.
[0077] ステップ S8は第 1の実施例と同様であり、調整手段としてのステップ こおいて は、トラッキングバランスの調整を行うために各種調整を行うために必要な信号として のトラッキングエラー信号のレベルをトラッキングエラー信号から取得し、そのレベル に基づ!/、てトラッキングバランスの調整を行 、、 CD 11のトラッキング方向の読み取り が最適になるように調整し、ステップ S1CTに進む。  [0077] Step S8 is the same as that in the first embodiment. In this step as an adjustment means, the level of the tracking error signal as a signal necessary for performing various adjustments in order to adjust the tracking balance. Is obtained from the tracking error signal, and the tracking balance is adjusted based on the level! /, And the reading in the tracking direction of the CD 11 is adjusted to be optimal, and the process proceeds to step S1CT.
[0078] 調整手段としてのステップ S 1(Τにお!/、ては、フォーカスバランスの調整を行うため に各種調整を行うために必要な信号としてのフォーカスエラー信号のレベルをフォー カスエラー信号から取得し、そのレベルに基づ!/、てフォーカスバランスの調整を行!ヽ 、 CD11のフォーカス方向の読み取りが最適になるように調整し、ステップ S11に進 む。ステップ S11以降は第 1の実施例と同様である。  [0078] Step S1 as an adjustment means (Oh !!, and, from the focus error signal, obtains the level of the focus error signal as a signal necessary for performing various adjustments in order to adjust the focus balance. Based on the level, adjust the focus balance and adjust the CD11 focus direction to the optimum reading, and proceed to step S11. It is the same.
[0079] 本実施例によれば、 CD11から倍速で読み出した情報を再生しつつー且再生情報 用バッファ 20へも格納し、所定量まで溜まったら CD11からの読み出しを一時停止し て再生情報用バッファ 20から情報を読み出して音声信号処理部 7が読み出して再生 することで、再生情報用バッファ 20から情報を読み出しているときは、 CD11からの 情報読み出しを一時的に停止させることで光ピックアップ 3やサーボ制御部 4に空き 時間を設けられるので、その間に従来再生前に行っていた、トラッキングエラー信号 のレベルやフォーカスエラー信号のレベルを取得して、トラッキングバランスとフォー カスバランスの調整およびトラッキングゲインとフォーカスゲインの調整が再生と並行 して行える（CD11からの読み出しを停止している間も再生情報用バッファ 20から読 み出された情報が再生され音声信号出力端子 9から出力されるので CDプレーヤ 1と しては再生と並行して調整を行っていることになる）ので、予めバッファ 5にトラツキン グエラー信号のレベルやフォーカスエラー信号のレベルを記憶させなくても CD11の セットから情報の再生の開始までの時間が短縮される。 [0079] According to the present embodiment, information read out from the CD 11 at double speed is being reproduced and stored in the reproduction information buffer 20, and when it reaches a predetermined amount, reading from the CD 11 is paused for reproduction information. When the information is read from the reproduction information buffer 20 by reading the information from the buffer 20 and being read and reproduced by the audio signal processing unit 7, the optical pickup 3 is temporarily stopped by reading the information from the CD 11. And servo control unit 4 can be freed up. Level and focus error signal level, tracking balance and focus balance adjustment, and tracking gain and focus gain adjustment can be performed in parallel with playback. Since the information read from the buffer 20 is reproduced and output from the audio signal output terminal 9, the CD player 1 is adjusted in parallel with the reproduction). Even if the tracking error signal level and focus error signal level are not memorized, the time from CD11 setting to the start of information reproduction is shortened.
[0080] なお、上述した第 2の実施例にお 、て、ステップ S 12で取得した調整値をステップ S 16で RFアンプ 4aやサーボ信号処理部 4bへ設定して再生を再開する際に、再生情 報用バッファ 20に情報が所定量以上溜まり、 CD11からの読み出しが一時的に停止 しているときに、ステップ 以降の調整を行っても良い。このようにすると、一度取得 した調整値をさらに調整することで、再生精度をさらに良くすることが可能となる。  [0080] In the second embodiment described above, when the adjustment value acquired in step S12 is set in the RF amplifier 4a or the servo signal processing unit 4b in step S16 and playback is resumed, When the information stored in the reproduction information buffer 20 is more than a predetermined amount and reading from the CD 11 is temporarily stopped, the adjustment after the step may be performed. In this way, it is possible to further improve the reproduction accuracy by further adjusting the adjustment value once acquired.
[0081] また、サーボ信号処理部 4bが起動して光ピックアップ 3のフォーカスを引き込んだ 際に、トラッキングバランスで VIと V2の値、フォーカスバランスで V3と V4の値がほぼ 等しくなつた場合やトラッキングゲインやフォーカスゲインが目標値と同じ値となった 場合は調整を行わなくてもよい。すなわちトラッキングバランス、フォーカスバランスト ラッキングゲイン、フォーカスゲインのうち調整の必要のない状態の項目は調整を行 わなくても良い。  [0081] When the servo signal processing unit 4b is activated and the focus of the optical pickup 3 is pulled, the tracking balance values VI and V2 are almost equal, and the focus balance values V3 and V4 are almost equal. If the gain or focus gain is the same as the target value, adjustment is not necessary. In other words, items that do not need to be adjusted among tracking balance, focus balance tracking gain, and focus gain need not be adjusted.
[0082] また、本実施例では、光ディスク再生装置を CDプレーヤとした力 DVD (Digital V ersatile Disc)プレーヤや MD (Mini Disc)プレーヤなど他の光ディスク再生装置に適 用しても良い。  Further, in this embodiment, the present invention may be applied to other optical disc playback apparatuses such as a DVD (Digital Versatile Disc) player and an MD (Mini Disc) player using an optical disc playback apparatus as a CD player.
[0083] 前述した実施例によれば、以下の光ディスク再生装置と光ディスク再生方法が得ら れる。  [0083] According to the above-described embodiment, the following optical disc playback apparatus and optical disc playback method can be obtained.
[0084] (付記 1)情報が記録された CD11に対しレーザ光を照射し、 CD11からの反射光に よりトラッキングエラー信号、フォーカスエラー信号を得る光ピックアップ 3と、光ピック アップ 3が得たトラッキングエラー信号、フォーカスエラー信号に基づ 、て光ピックアツ プ 3をフォーカス方向及びトラッキング方向へ駆動するための制御を行うサーボ制御 部 4と、サーボ制御部 4の各種調整を行うサーボ信号処理部 4bと、サーボ信号処理 部 4bが各種調整を行うために必要なトラッキングエラー信号のレベル、フォーカスェ ラー信号のレベルを記録するバッファ 5と、 CD 11に記録された情報を再生する音声 信号処理部 7と、反射光を受光すべくサーボ制御部 4を起動させるとともに反射光に より得られるトラッキングエラー信号、フォーカスエラー信号力もサーボ信号処理部 4b が各種調整を行うために必要なトラッキングエラー信号のレベル、フォーカスエラー 信号のレベルをバッファ 5に記録させ、そして、サーボ制御部 4の起動に伴い得られ る信号を基に音声信号処理部 7による情報の再生を開始させるとともに情報の再生と 並行してバッファ 5に記録された必要な信号を用いてサーボ信号処理部 4bによる各 種調整を行わせるサーボ信号処理部 4bと、を備えたことを特徴とする CDプレーヤ 1 [0084] (Appendix 1) The optical pickup 3 that irradiates the CD11 on which information is recorded with a laser beam and obtains a tracking error signal and a focus error signal by the reflected light from the CD11, and the tracking obtained by the optical pickup 3 Based on the error signal and the focus error signal, the servo control unit 4 that performs control for driving the optical pickup 3 in the focus direction and the tracking direction, and the servo signal processing unit 4b that performs various adjustments of the servo control unit 4 Servo signal processing The buffer 5 that records the level of the tracking error signal and the level of the focus error signal that are necessary for the section 4b to make various adjustments, the audio signal processor 7 that reproduces the information recorded on the CD 11, and the reflected light The servo control unit 4 is activated to receive light, and the tracking error signal level and focus error signal force obtained by reflected light are also required for the servo signal processing unit 4b to make various adjustments. Is recorded in the buffer 5, and the audio signal processing unit 7 starts reproducing information based on the signal obtained when the servo control unit 4 is activated, and is recorded in the buffer 5 in parallel with the information reproduction. And a servo signal processing unit 4b for performing various adjustments by the servo signal processing unit 4b using necessary signals. CD player 1
[0085] この CDプレーヤ 1によれば、再生前にはトラッキングエラー信号のレベルとフォー カスエラー信号のレベルのみを記録してぉ 、て、調整は CD11から情報の再生を始 めた後に行うので CD11をセットして力 CD11に記録された情報が再生され始める までの時間が短縮できる。 [0085] According to the CD player 1, only the tracking error signal level and the focus error signal level are recorded before reproduction, and adjustment is performed after information reproduction is started from the CD11. The time until the information recorded on the CD11 starts playing can be shortened.
[0086] (付記 2)情報が記録された CD11に対しレーザ光を照射し、 CD11からの反射光に よりトラッキングエラー信号、フォーカスエラー信号を得る光ピックアップ 3と、光ピック アップ 3が得たトラッキングエラー信号、フォーカスエラー信号に基づ 、て光ピックアツ プ 3をフォーカス方向及びトラッキング方向へ駆動するための制御を行うサーボ制御 部 4と、サーボ制御部 4の各種調整を行うサーボ信号処理部 4bと、 CD11に記録され た情報を記憶する再生情報用バッファ 20と、 CD11に記録された情報を再生する音 声信号処理部 7と、反射光を受光すべくサーボ制御部 4を起動させ、そして、サーボ 制御部 4の起動に伴い得られる信号を基に光ピックアップ 3に CD11から再生速度よ りも速い速度で情報を読み出させ、読み出された情報を再生情報用バッファ 20に記 憶するとともに音声信号処理部 7に情報の再生を開始させ、再生情報用バッファ 20 に所定量情報が記憶されたら、 CD11からの情報読み出しを停止させ、音声信号処 理部 7に再生情報用バッファ 20から読み出した情報を再生させるとともに並行してサ ーボ信号処理部 4bによる各種調整を行わせるサーボ信号処理部 4bと、を備えたこと を特徴とする CDプレーヤ 1。 [0087] この CDプレーヤ 1によれば、再生情報用バッファ 20から情報を読み出している間 は、光ピックアップ 3に空き時間ができるので、この間に従来再生前に行っていた調 整を行うことができ、そのために再生前にバッファ 5にトラッキングエラー信号のレベル やフォーカスエラー信号のレベルを記録をしなくても、 CD11をセットしてから CD11 に記録された情報が再生されるまでの時間が短縮できる。 [0086] (Appendix 2) Optical pickup 3 that obtains a tracking error signal and a focus error signal by irradiating a laser beam to CD11 on which information is recorded and reflected from CD11, and tracking obtained by optical pickup 3 Based on the error signal and the focus error signal, the servo control unit 4 that performs control for driving the optical pickup 3 in the focus direction and the tracking direction, and the servo signal processing unit 4b that performs various adjustments of the servo control unit 4 The playback information buffer 20 for storing the information recorded on the CD 11, the audio signal processing unit 7 for reproducing the information recorded on the CD 11, and the servo control unit 4 to receive the reflected light, and The optical pickup 3 is made to read information from the CD 11 at a speed faster than the playback speed based on the signal obtained when the servo control unit 4 is started, and the read information is stored in the playback information buffer. When the audio signal processing unit 7 starts reproducing information and a predetermined amount of information is stored in the reproduction information buffer 20, reading of information from the CD 11 is stopped and the audio signal processing unit 7 A CD player 1 comprising: a servo signal processing unit 4b for reproducing information read from the reproduction information buffer 20 and performing various adjustments by the servo signal processing unit 4b in parallel. [0087] According to this CD player 1, while information is being read from the reproduction information buffer 20, the optical pickup 3 has a free time, and during this time, adjustments that have been made before reproduction can be performed. Therefore, even if the tracking error signal level and focus error signal level are not recorded in the buffer 5 before playback, the time from setting the CD11 to playback of the information recorded on the CD11 is shortened. it can.
[0088] (付記 3)情報が記録された CD11に対しレーザ光を照射し、 CD11からの反射光に よりトラッキングエラー信号、フォーカスエラー信号を得て、トラッキングエラー信号、フ オーカスエラー信号に基づ 、て CD11に記録されて 、る情報を正確に読み取れるよ うに制御する CD11再生方法にお 、て、反射光を受光するとともに反射光により得ら れるトラッキングエラー信号、フォーカスエラー信号力 各種調整を行うために必要な トラッキングエラー信号のレベル、フォーカスエラー信号のレベルを記録させ、そして 、反射光の受光に伴い得られるトラッキングエラー信号、フォーカスエラー信号を基 に情報の再生を開始させるとともに情報の再生と並行して記録されたトラッキングエラ 一信号のレベル、フォーカスエラー信号のレベルを用いて各種調整を行わせることを 特徴とする CD11再生方法。  [0088] (Appendix 3) A laser beam is irradiated to CD11 on which information is recorded, and a tracking error signal and a focus error signal are obtained by reflected light from CD11, and based on the tracking error signal and the focus error signal. In the CD11 playback method, which controls the information recorded on the CD11 so that it can be read accurately, the reflected light is received and the tracking error signal obtained by the reflected light and the focus error signal force are adjusted. The level of the tracking error signal and the level of the focus error signal necessary for recording are recorded, and information reproduction is started based on the tracking error signal and the focus error signal obtained by receiving the reflected light. Using tracking error signal level and focus error signal level recorded in parallel A CD11 playback method characterized by various adjustments.
[0089] この CD11再生方法によれば、再生前にはトラッキングエラー信号のレベルとフォ 一カスエラー信号のレベルのみを記録してぉ 、て、調整は CD11から情報を再生し 始めた後に行うので CD 11をセットして力 CD 11に記録された情報を再生し始める までの時間が短縮できる。  [0089] According to this CD11 playback method, only the tracking error signal level and the focus error signal level are recorded before playback, and the adjustment is performed after the information is started to be played back from CD11. You can shorten the time from setting 11 to starting playback of information recorded on Power CD 11.
[0090] (付記 4)情報が記録された CD11に対しレーザ光を照射し、 CD11からの反射光に よりトラッキングエラー信号、フォーカスエラー信号を得て、トラッキングエラー信号、フ オーカスエラー信号に基づ 、て CD11に記録されて 、る情報を正確に読み取れるよ うに制御する CD11再生方法にお ヽて、  [0090] (Appendix 4) The CD11 on which information is recorded is irradiated with a laser beam, and a tracking error signal and a focus error signal are obtained by reflected light from the CD11. Based on the tracking error signal and the focus error signal The CD11 playback method, which controls the information recorded on the CD11 so that it can be read accurately,
CD11から再生速度よりも速い速度で情報を読み出し、読み出された情報を記憶 するとともに情報の再生を開始させ、所定量情報が記憶されたら、 CD11からの情報 読み出しを停止させ、記憶した前記情報を再生するとともに並行して各種調整を行う ことを特徴とする CD11再生方法。  The information is read from the CD 11 at a speed higher than the playback speed, the read information is stored and the information playback is started, and when a predetermined amount of information is stored, the information read from the CD 11 is stopped and the stored information is stored. CD11 playback method, characterized in that various adjustments are made in parallel with the playback of the CD.
[0091] この CD11再生方法によれば、記憶された情報を読み出している間は、光ディスク 力もの読み出しを行わない空き時間ができるので、この間に従来再生前に行ってい た調整を行うことができ、そのために再生前にバッファ 5にトラッキングエラー信号のレ ベルやフォーカスエラー信号のレベルを記録をしなくても、光ディスクをセットしてから 光ディスクに記録された情報が再生されるまでの時間が短縮できる。 [0091] According to this CD11 playback method, while the stored information is being read, the optical disc Since there is a free time during which no powerful reading is performed, it is possible to make adjustments that were performed before playback during this period.For this purpose, the level of the tracking error signal and the level of the focus error signal are recorded in buffer 5 before playback. Even if it is not necessary, the time from setting the optical disc to reproducing the information recorded on the optical disc can be shortened.
なお、前述した実施例は本発明の代表的な形態を示したに過ぎず、本発明は、実 施例に限定されるものではない。すなわち、本発明の骨子を逸脱しない範囲で種々 変形して実施することができる。  The above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

Claims

請求の範囲 The scope of the claims
[1] 情報が記録された光ディスクに対しレーザ光を照射し、前記光ディスク力 の反射 光により信号を得る光ピックアップと、  [1] an optical pickup that irradiates a laser beam onto an optical disc on which information is recorded and obtains a signal by reflected light of the optical disc force;
前記光ピックアップが得た信号に基づいて前記光ピックアップをフォーカス方向及び トラッキング方向へ駆動するための制御を行うサーボ制御手段と、  Servo control means for performing control for driving the optical pickup in a focus direction and a tracking direction based on a signal obtained by the optical pickup;
前記サーボ制御手段の各種調整を行う調整手段と、  Adjusting means for performing various adjustments of the servo control means;
前記調整手段が各種調整を行うために必要な信号を記録する記録手段と、 前記光ディスクに記録された情報を再生する再生手段と、  Recording means for recording signals necessary for the adjustment means to perform various adjustments; and reproducing means for reproducing information recorded on the optical disc;
前記反射光を受光すべく前記サーボ制御手段を起動させるとともに前記反射光に より得られる信号力 前記調整手段が各種調整を行うために必要な信号を前記記録 手段に記録させ、そして、前記サーボ制御手段の起動に伴い得られる信号を基に前 記再生手段による情報の再生を開始させるとともに前記情報の再生と並行して前記 記録手段に記録された必要な信号を用いて前記調整手段による各種調整を行わせ る制御手段と、  The servo control means is activated to receive the reflected light, and the signal force obtained by the reflected light is recorded on the recording means for the adjustment means to perform various adjustments, and the servo control is performed. Various reproduction adjustments by the adjustment means using the necessary signals recorded in the recording means in parallel with the reproduction of the information and starting the reproduction of information by the reproduction means based on the signal obtained with the activation of the means Control means for performing
を備えたことを特徴とする光ディスク再生装置。  An optical disc reproducing apparatus comprising:
[2] 情報が記録された光ディスクに対しレーザ光を照射し、前記光ディスク力 の反射 光により信号を得る光ピックアップと、  [2] an optical pickup that irradiates an optical disc on which information is recorded with laser light and obtains a signal by reflected light of the optical disc force;
前記光ピックアップが得た信号に基づいて前記光ピックアップをフォーカス方向及び トラッキング方向へ駆動するための制御を行うサーボ制御手段と、  Servo control means for performing control for driving the optical pickup in a focus direction and a tracking direction based on a signal obtained by the optical pickup;
前記サーボ制御手段の各種調整を行う調整手段と、  Adjusting means for performing various adjustments of the servo control means;
前記光ディスクに記録された情報を記憶する情報記憶手段と、  Information storage means for storing information recorded on the optical disc;
前記光ディスクに記録された情報を再生する再生手段と、  Reproducing means for reproducing information recorded on the optical disc;
前記反射光を受光すべく前記サーボ制御手段を起動させ、そして、前記サーボ制 御手段の起動に伴い得られる信号を基に前記光ピックアップに前記光ディスクから 再生速度よりも速い速度で前記情報を読み出させ、読み出された前記情報を前記情 報記憶手段に記憶するとともに前記再生手段に前記情報の再生を開始させ、前記 情報記憶手段に所定量前記情報が記憶されたら、前記光ディスクからの情報読み出 しを停止させ、前記再生手段に前記情報記憶手段から読み出した前記情報を再生 させるとともに並行して前記調整手段による各種調整を行わせる制御手段と、 を備えたことを特徴とする光ディスク再生装置。 The servo control means is activated to receive the reflected light, and the information is read from the optical disk to the optical pickup at a speed higher than the reproduction speed based on a signal obtained when the servo control means is activated. The information stored in the information storage means is stored in the information storage means and the reproduction means is started to reproduce the information. When the information storage means stores the predetermined amount of information, the information from the optical disc is stored. Reading is stopped and the information read from the information storage means is reproduced by the reproduction means. And an optical disk reproducing apparatus comprising: a control unit configured to perform various adjustments by the adjustment unit in parallel.
[3] 前記記録手段に記録され、前記調整手段が各種調整を行うために必要な信号は、 トラッキングエラー信号のレベルと、フォーカスエラー信号のレベルであることを特徴 とする請求項 1または 2記載の光ディスク再生装置。  3. The signal recorded in the recording means and necessary for the adjustment means to perform various adjustments is a level of a tracking error signal and a level of a focus error signal. Optical disk playback device.
[4] 前記調整手段により調整された前記サーボ制御手段の調整値を保存する保存手 段と、  [4] A storage means for storing the adjustment value of the servo control means adjusted by the adjustment means;
一度前記光ディスクから情報の再生を停止した後に再度前記光ディスクから情報の 再生を開始するときは前記保存手段に保存した前記調整値を前記サーボ制御手段 へ設定する設定手段と、を備えたことを特徴とする請求項 1乃至 3のいずれか記載の 光ディスク再生装置。  And setting means for setting the adjustment value stored in the storage means to the servo control means when reproduction of information from the optical disk is started again after stopping the reproduction of information from the optical disk. The optical disk reproducing device according to claim 1, wherein
[5] 情報が記録された光ディスクに対しレーザ光を照射し、前記光ディスク力 の反射 光により信号を得て、前記信号に基づ 、て前記光ディスクに記録されて 、る情報を 正確に読み取れるように制御する光ディスク再生方法にお！ヽて、  [5] An optical disc on which information is recorded is irradiated with a laser beam, a signal is obtained by reflected light of the optical disc force, and the information recorded on the optical disc is read accurately based on the signal. To optical disc playback method to control! In a hurry
前記反射光を受光するとともに前記反射光により得られる信号から各種調整を行う ために必要な信号を記録し、そして、前記反射光の受光に伴い得られる信号を基に 情報の再生を開始するとともに前記情報の再生と並行して記録した前記必要な信号 を用いて各種調整を行うことを特徴とする光ディスク再生方法。  While receiving the reflected light, recording a signal necessary for performing various adjustments from the signal obtained by the reflected light, and starting reproduction of information based on the signal obtained by receiving the reflected light An optical disc reproducing method comprising performing various adjustments using the necessary signal recorded in parallel with the reproduction of the information.
[6] 情報が記録された光ディスクに対しレーザ光を照射し、前記光ディスク力 の反射 光により信号を得て、前記信号に基づ 、て前記光ディスクに記録されて 、る情報を 正確に読み取れるように制御する光ディスク再生方法にお！ヽて、  [6] An optical disk on which information is recorded is irradiated with a laser beam, a signal is obtained by reflected light of the optical disk force, and the information recorded on the optical disk is read accurately based on the signal. To optical disc playback method to control! In a hurry
前記光ディスクから再生速度よりも速い速度で前記情報を読み出し、読み出された 前記情報を記憶するとともに前記情報の再生を開始させ、所定量前記情報が記憶さ れたら、前記光ディスクからの情報読み出しを停止させ、記憶した前記情報を再生す るとともに並行して各種調整を行うことを特徴とする光ディスク再生方法。  The information is read from the optical disc at a speed faster than the reproduction speed, the read information is stored and the reproduction of the information is started, and when a predetermined amount of the information is stored, the information is read from the optical disc. An optical disc reproducing method characterized by stopping and reproducing the stored information and performing various adjustments in parallel.
[7] 前記光ディスクの反射光より得られ各種調整を行うために記録する前記必要な信 号は、トラッキングエラー信号のレベルと、フォーカスエラー信号のレベルとであること を特徴とする請求項 5または 6記載の光ディスク再生方法。 調整を行った前記調整値を保存し、一度前記光ディスクから情報の再生を停止し た後に再度前記光ディスクから情報の再生を開始するときは、前記保存した調整値 を設定して情報の再生を行うことを特徴とする請求項 5乃至 7のいずれか記載の光デ イスク再生方法。 7. The required signal to be recorded for performing various adjustments obtained from the reflected light of the optical disc is a level of a tracking error signal and a level of a focus error signal. 6. The optical disk reproducing method according to 6. When the adjustment value that has been adjusted is stored and information reproduction from the optical disc is once stopped and then information reproduction is started again from the optical disc, the saved adjustment value is set to reproduce the information. 8. The optical disk regeneration method according to claim 5, wherein the optical disk is regenerated.
PCT/JP2006/319751 2005-10-28 2006-10-03 Device and method for reproducing optical disc WO2007049431A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10162485A (en) * 1996-11-25 1998-06-19 Alpine Electron Inc Digital servo adjusting method for disk device
JPH10275344A (en) * 1997-04-01 1998-10-13 Fujitsu Ten Ltd Disk reproducing device
JP2001160217A (en) * 1999-09-20 2001-06-12 Matsushita Electric Ind Co Ltd Method for correcting control of disk-shaped recording medium recording and reproducing device and disk- shaped recording medium recording and reproducing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10162485A (en) * 1996-11-25 1998-06-19 Alpine Electron Inc Digital servo adjusting method for disk device
JPH10275344A (en) * 1997-04-01 1998-10-13 Fujitsu Ten Ltd Disk reproducing device
JP2001160217A (en) * 1999-09-20 2001-06-12 Matsushita Electric Ind Co Ltd Method for correcting control of disk-shaped recording medium recording and reproducing device and disk- shaped recording medium recording and reproducing device

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