CN1992057A - Data checking device and method for high-density CD permanent information and control data area - Google Patents
Data checking device and method for high-density CD permanent information and control data area Download PDFInfo
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Abstract
A data detecting device and method of high-density compact disc permanent information and control data area includes:, optic pick-up part which recognizes the recording mode of high-frequency modulation groove which is after the two-phase modulation and generates relative signal in location of disc leading-in area; analogue/digit converter which samples and quantizes the high-frequency modulated signal recognized; phase shifting detector which judges whether is there phase shifting based on the sign of sampled value; circulating adder which add the sampled value continuously; groove length detector which detects the length of groove mode included in the recognized high-frequency modulated signal and generates circulating value; bit detector which detects the bit row recorded in the high-frequency modulation groove when the phase shifting detector detects the phase shifting. The invention just uses simple circulating adder to regenerate the high-frequency modulated bit data of high-density compact disc.
Description
Technical field
The present invention relates to permanent information and control data (PIC:PermanentInformation ﹠amp in the high density regeneration special-purpose cd; Control data, hereinafter to be referred as PIC) regional data detection device and method thereof, relate in particular in the middle of the recording/reproducing system of high density compact disc, utilize the PIC zone in the high density compact disc ingress area, come the restored method of the HFM performance data of recorded information by high frequency modulated (HFM) groove mode.
Background technology
Recently, at can non-volatile recording and store the high image quality video data and the novel high-density repeatable recording CD of high tone quality voice data,, the common structure that can carry out the CD of duplicate record be described referring to Fig. 1-Fig. 5.Fig. 1 is the structural representation of the common CD (BD-RW) that can carry out duplicate record; Fig. 2 is the shape synoptic diagram of the HFM groove that institute modulates and writes down in importing (Lead-In) zone on the common CD that can carry out duplicate record; Fig. 3 is the structural representation of common (Push/Pull) formula of the recommending tracking servo device that optical disc apparatus was suitable for that can carry out duplicate record; Fig. 4 is the synoptic diagram of the structure embodiment of common high density regeneration special-purpose cd (BD-ROM); Fig. 5 is the synoptic diagram that the PLL calcspar in high density compact disc (BD-ROM) regenerating unit is shown.
Example is such as shown in Figure 1, and the normalization operation of the Blu-ray Disc (hereinafter to be referred as BD-RW) of repeatable recording is being obtained progress at full speed, and therefore, Related product also is expected to be developed and comes out and popularize gradually.
On the other hand, at above-mentioned BD-RW, its structure is: CD be disposed with clamp zone, transition region and BCA zone, ingress area (Lead-In Area) interior week, be provided with data area (Data Area) and export area (Lead-Out Area) in the center and the periphery of CD.
And above-mentioned ingress area (Lead_in Area) is divided into the 1st protection (Guard 1) zone and PIC (Permanent Information amp; Control data) zone and the 2nd protection (Guard 2) zone and information 2 (Info 2) zone and OPC (Optimum Power Control) zone etc.; described the 1st protection zone and PIC zone are the zones (Pre-recorded area) that records data in advance; on the contrary, other ingress area and above-mentioned data area and export area are the zones (Rewritable area) of record new data.
And, in described PIC zone, being provided with and writing down high frequency modulated (HFM:High FrequencyModulated) groove, this groove is the zone of being responsible for record and storing the main and general information that needs long preservation in the CD.Above-mentioned HFM groove, such as shown in Figure 2, rely on bi-phase modulated (Bi-Phase Modulated) mode to modulate and record, then optical disc information is write down and stores.
For example, when writing down the HFM groove of identical bits phase between the recording areas of ' 36T ', its value is exactly ' 0 '; When writing down the HFM groove of coordination phase not between the recording areas of ' 36T ', its value is exactly ' 1 '.
On the other hand, being intended to the employed mode of tracking servo device that the HFM groove that is write down in the above-mentioned PIC zone is followed the tracks of is (Push/Pull) mode of recommending that is widely known by the people, for this reason, in the device of CD, such as shown in Figure 3, include following two ingredients: the light signal that will receive CD 20 by object lens (OL) 10 and collimation lens (CL) 11 convert to electric signal be responsible for carry out two of opto-electronic conversion and cut apart photo detector 12; (Ea Eb) carries out the differential amplifier 13 of differential amplification to cut apart electric signal after photo detector comes respectively each opto-electronic conversion handled by above-mentioned two.
Therefore, on above-mentioned optical disc apparatus, the tracking servo of carrying out above-mentioned HFM groove with reference to the tracking error signal (TE=Ea-Eb) that is output by above-mentioned differential amplifier moves, and, for the groove of shake (Wobble) shape that is write down in above-mentioned data area and the export area, also with reference to the tracking servo action of carrying out by the tracking error signal (TE=Ea-Eb) of above-mentioned differential amplifier output above-mentioned shake shape groove.
On the other hand, in the above-mentioned BD-RW of exploitation, the high density regeneration special-purpose cd of discussing between the relevant at present industry body is BDROM for example, such just as shown in Figure 4, the structure of its CD is: the inner peripheral surface of CD is provided with clamp zone and ingress area, and be respectively arranged with data area and export area on the central plane of CD and the outer peripheral face, simultaneously, above-mentioned ingress area is the same with BD-RW to come recording disk information by HFM groove mode, and also the same with CD-ROM or DVDROM etc. the usually data of being responsible for record and storing the pre-pit row with the export area in above-mentioned data area.
High density regeneration CD with said structure can be discerned the HFM groove that the PIC zone is write down, and with data recovery and then read out the information of CD self.In the bi-phase modulated mode, as illustrated in fig. 2, if in during 36T, the position of HFM groove is mutually identical, and its data just are 0 so; If change has taken place mutually in the position, its data just show as 1 so.So, in order to detect the time of 36T, generally all such as shown in Figure 5, employed is the clock recovery mode of utilizing phase-locked loop (PLL), and the position during utilizing the clock be resumed like this to 36T has no change to judge and data are detected mutually.PLL in high density compact disc (BD-ROM) regenerating unit is comprised: HFM input signal, A/D converter, bit-detector, frequency/phase rotation indicator, loop filter, DCO, bit phase rotation indicator, the output of HFM Bit data.
Though this method of PLL of utilizing is very general, but owing to need one of design to come with the corresponding frequency of HFM groove and be utilized to the PLL that the data in data zone are recovered is used jointly, so exist the problem that needs the necessary pre-service logic of the common use of other affix.
Summary of the invention
The present invention proposes for addressing the above problem just, and its purpose is to provide a kind of and does not use PLL but utilize the characteristic of bi-phase modulated mode to come a kind of apparatus and method that the data in PIC zone are recovered on the above-specified high density CD.
To achieve these goals, the data detection device in high-density CD permanent information of the present invention and control data zone, be used for inside is provided with the device that the high density regeneration special-purpose cd of ingress area, data area and export area is regenerated, comprise following ingredient: to discerning through the logging mode of the high frequency modulated groove (Bi-phase modulated HFM groove) after the bi-phase modulated, the light that generates relevant therewith signal then picks up portion in the specific region in above-mentioned CD ingress area; The high-frequency modulation signal of being discerned by the above-mentioned light portion of picking up is taken a sample and with its quantized analog/digital converter; Utilize the symbol of above-mentioned sampling institute value to judge whether the position phase shift detecting device of presence bit phase shift; Be responsible for the numerical value of above-mentioned sampling is carried out the circled addition device that continuous addition is handled; After included groove pattern is carried out length detection in the high-frequency modulation signal that the above-mentioned light portion of picking up is discerned, generate the trench length detecting device of above-mentioned circled addition device cycle values; And when last rheme phase shift detecting device detects phase shift, the bit-detector that the bit column that is write down in the above-mentioned high frequency modulated groove is detected just.
In addition, to achieve these goals, the Data Detection method in high-density CD permanent information of the present invention and control data zone, inside is included the method that the PIC area data in the middle of the high density regeneration special-purpose cd of ingress area, data area and export area detects, comprise following step: at above-mentioned permanent information and control data zone (PIC:Permanent Information; Control data) zone is discerned by high frequency modulated (the Bi-phase modulated HFM groove) pattern after the bi-phase modulated processing above-mentioned, and it is carried out digitizing and sampling processing, then with its quantized step; Utilize the interior included groove pattern of above-mentioned high frequency modulated groove pattern to generate the step of cycle values; Whether the numerical value after the above-mentioned sampling step that a phase shift is judged is taken place; Numerical value after the above-mentioned sampling is carried out the step of continuous addition; Is benchmark when the position phase shift to take place, the step that the bit of above-mentioned high frequency modulated groove pattern is detected.
Generate the method for cycle values among the present invention preferably with above-mentioned PIC (Permanent Information ﹠amp; Control data) pattern of the change of the process high frequency modulated groove (HFM groove) in zone processing is divided into the interval that comprises a groove pattern at least, then being object between each cut section, from above-mentioned groove pattern, the longest trench length is released by in the interval that splits, then at these in the middle of the maximum trench length that is drawn out of between each cut section, minimum length and maximum length are removed, again remaining length is averaged, and with this mean value and difference (M) addition, and then break it into two, thereby obtain cycle values.
In the present invention, after generating above-mentioned cycle values, preferably this value is exported to the circled addition device, and the action sign of above-mentioned circled addition device is set at ' 1 '.
In the present invention, the method that the numerical value of above-mentioned sampling gained is carried out continuous addition is preferably: the sampling value that extracts in the middle of the high frequency modulated groove pattern that lasting accumulation is transfused to until the position phase shift takes place the time till, then, if the inclination symbol that the position phase shift is just exported the symbol of above-mentioned accumulated value and is added in together sampling value has at present taken place.
The detection method of PIC area data in the high density of the present invention regeneration special-purpose cd, it is characterized in that: the sampling value after above-mentioned addition has surpassed cycle values, and the circulation sign just is set to ' 1 '.
In the present invention, when take place going up the rheme phase shift, if the numerical value of circulation sign be ' 1 ', so the current additive value of circled addition device preferably be set to ' 0 '.
In the present invention, the method that high frequency modulated groove (the Bi-phase modulatedHFM groove) bit of pattern after above-mentioned bi-phase modulated handled detects is: on taking place during the rheme phase shift, if circulation is masked as 1, just according to the result and the inclination situation of circled addition device, the bit decision of above-mentioned high frequency modulated pattern is ' 0 ', and preferably flag of frame is set at ' 0 '.
In the present invention, the method that high frequency modulated groove (the Bi-phase modulatedHFM groove) bit of pattern after the above-mentioned bi-phase modulated processing is detected is: when the position phase shift takes place, be masked as if circulate ' 0 ', so flag of frame just judge for ' 1 ' time the bit of above-mentioned two-phase groove pattern after handling through high frequency modulated be ' 1 ', if above-mentioned flag of frame be ' 0 ' just flag of frame is set at ' 1 ', preferably do not export any data simultaneously.
Effect of the present invention:
In sum, utilize the data detection device and the method thereof in high-density CD permanent information of the present invention and control data zone can be under the situation of the phase-locked loop of not using standard (PLL), only by utilizing simple circled addition device to come the HFM Bit data of high density compact disc is regenerated.
And power of regeneration of the present invention is not a halfpenny the worse, and it does not need indispensable logic when regenerating than the simpler totalizer of existing complicated PLL structure by the use said structure.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
Description of drawings
Fig. 1 is the structural representation of the common CD (BD-RW) that can carry out duplicate record.
Fig. 2 is the shape synoptic diagram of the HFM groove that institute modulates and writes down in importing (Lead-In) zone on the common CD that can carry out duplicate record.
Fig. 3 is the structural representation of common (Push/Pull) formula of the recommending tracking servo device that optical disc apparatus was suitable for that can carry out duplicate record.
Fig. 4 is the synoptic diagram of the structure embodiment of common high density regeneration special-purpose cd (BD-ROM).
Fig. 5 is the synoptic diagram that the PLL calcspar in high density compact disc (BD-ROM) regenerating unit is shown.
Fig. 6 is the calcspar to being the device of regenerating of the HFM data in the high density compact disc of foundation with one embodiment of the present of invention.
Fig. 7 is to being the procedure chart that the groove length detection method of foundation shows with one embodiment of the present of invention.
Fig. 8 is to be the circled addition device of foundation and the action synoptic diagram of bit-detector with one embodiment of the present of invention.
Fig. 9 is to being the procedure chart that the flow process of the circled addition device of foundation shows with one embodiment of the present of invention.
Figure 10 is to being the procedure chart that the process flow diagram of the bit-detector of foundation shows with one embodiment of the present of invention.
The symbol description of major part in the accompanying drawing:
602: analog/digital converter 603: position phase shift detecting device
604: circled addition device 605: the groove length detecting device
606: bit-detector 607:HFM Bit data
Embodiment
Below just the data detection device in high-density CD permanent information of the present invention and control data zone and the embodiment of method thereof are described in detail with reference to accompanying drawing.When giving the major part mark reference marks of following each accompanying drawing, though identical structure division also has demonstration in the middle of other accompanying drawings, but identical part might be used identical symbol, simultaneously for outstanding main idea of the present invention, to the well-known unnecessary function that describes and structure being elaborated not just here to them.
Fig. 6 is to be the calcspar of HFM data regeneration device in the high density compact disc that includes the circled addition device of foundation with one embodiment of the present of invention.
In the middle of the foregoing description, the HFM data regeneration device comprises: in the specific region in above-mentioned CD ingress area, logging mode to the high frequency modulated groove after handling through bi-phase modulated is discerned, and the light that generates relevant therewith signal then picks up portion, by the signal of the light portion of picking up output HFM input signal 601, analog/digital converter 602, position phase shift detecting device 603, circled addition device 604, groove length detecting device 605, bit-detector 606 and the HFM Bit data 607 as the HFM data regeneration device.
In the middle of the foregoing description, roughly shown the responsible device that the data in PIC zone in the high density compact disc driver are regenerated.
Include the PIC zone in the middle of the ingress area in the high density compact disc driver, medelling is carried out to the bit column after handling through high frequency modulated in above-mentioned PIC zone.Above-mentioned bit column is discerned by the portion of picking up of the light in the CD drive, and above-mentioned identified signal is regenerated as high_frequency sine wave shape signal.The above-mentioned signal that is reproduced out is utilized fixing frequency through analog/digital converter 602 and takes a sample.Above-mentioned analog/digital converter 602 after with above-mentioned sampling signal quantization and it is presented as several bit values.
Whether institute's rheme phase shift detecting device 603 by quantized bit value the position phase shift has been taken place after judging above-mentioned sampling according to symbol.That is, judge and above-mentionedly to be changed to (+) value to (-) value or from (-) value from (+) value in which moment by quantized bit value.The input signal that described generation or the signal that the position phase shift takes place are used as above-mentioned circled addition device 604, groove length detecting device 605 and bit-detector 605 uses.
Described groove length detecting device 605 extracts included groove mode in the above-mentioned HFM signal and generate the cycle values of above-mentioned circled addition device 604.The groove mode that in the middle of the HFM signal, includes 54T/54T length.Length by 605 couples of 54T of groove length detecting device detects.And till accumulating sampling value when the position phase shift takes place, find out value maximum in the groove preliminary detection interval then.If maximal value and minimum value in the groove provisional value of being found out are like this removed, obtain the mean value of all the other groove provisional values again, just can detect the length of groove.Mean value and the addition of poor (M) value with the groove provisional value breaks it into two again then, just obtained the cycle values of circled addition device 604.This process is being carried out during the HFM data are reproduced constantly, thereby can upgrade the groove length mutually attached with current input constantly.Under above-mentioned environment, M=0 and cycle values are and the corresponding value of 27T., exist noise composition and sampling value to move to the phenomenon of 0 position in the middle of occurring in input HFM signal sometimes.That is, because central plane is to move by the low frequency composition, so just utilize the M value that cycle values is set between the 20T-25T.
Below just said process is described in detail with reference to Fig. 7.
S701, at first, groove provisional value N and groove candidate value are set at ' 0 '.
Whether S702 a phase shift takes place.
S703, above-mentioned groove candidate value before the position phase shift takes place above-mentioned value (sample) of being come out by sampling from position phase shift detecting device 603, continue and sampled value (sample) of coming out mutually adduction be updated.
The position phase shift has taken place if detect above-mentioned value of being come out by sampling from position phase shift detecting device 603 in S704, just compares in the size to groove provisional value N and groove candidate value.
S705 is if groove candidate value just replaces groove provisional value N (groove provisional value N=groove candidate value) with groove candidate value than groove provisional value N is big.
S706, if above-mentioned S705 further groove candidate value is bigger than groove provisional value N, when replacing groove provisional value N with groove candidate value, groove candidate value is set at ' 0 '; If above-mentioned S704 further groove candidate value than groove provisional value N hour just directly groove candidate value is set at ' 0 '.
S707, said process continues to carry out in groove preliminary detection interval.
S708 if said process finishes, just exports groove provisional value N in above-mentioned groove preliminary detection interval.Described groove provisional value N continues to be output in the groove detection interval.
S709, the particular groove of HFM signal is longer than general data.That is, groove is 54T and general data is 36T.And this groove is detected repeatedly.
S710 is provided with the interval so that have a minimum groove, and finds out maximal value in this interval in groove preliminary detection interval.At that rate, this maximal value just becomes a groove provisional value, is called as S1.The groove detection interval comprises between N groove dark zone.Like this, just can detect the numerical value of N altogether of S1-SN.
Promptly do not have defective if occur mistake on the CD, the numerical value of S1-SN will be much at one so, the groove length that Here it is draws in the middle of the present speed.But owing in the middle of practical application, exist defective, thus need be in the middle of S1-SN with minimum value with maximal value is removed and obtain the length value of groove from remaining numerical value.Do not mark off the interval and groove detection interval of groove preliminary detection above-mentioned having not need to resemble under the wrong situation.
S711 exports N groove provisional value if resemble above-mentioned, just removes minimum value and maximal value wherein and other numerical value are averaged.Draw the cycle values of circled addition device 604 by the mode that above-mentioned mean value and the addition of poor (M) value are averaged again.
S712, after this a series of process finishes, above-mentioned groove length detecting device 605 is just exported above-mentioned cycle values to circled addition device 604, and the action sign of circled addition device 604 is set at ' 1 ', 604 pairs of above-mentioned cycle values of circled addition device are utilized.
Above-mentioned circled addition device 604 utilizes groove length detecting device 605 detected next cycle values to carry out initialization by the mode that sampled HFM signal is added up, and the action at each circled addition device 604 is masked as ' and 1 ' time upgrades cycle values, in time tackles the variation of importing with this.Circled addition device 604 is continuing the HFM sampling value of input is accumulated always till when the position phase shift takes place, and just the outcome symbol and the inclination symbol of circled addition device 604 is exported if the position phase shift has taken place.
Fig. 8 has shown the action situation of circled addition device 604, and in the length during 18T, the end value of circled addition device 604 does not reach cycle values.In the length of 36T, circled addition device 604 has drawn the result who surpasses cycle values, and the sign that will circulate this moment is set at 1.When the position phase shift takes place,, so just once more circled addition device 604 is set at 0 if circulation is masked as 1.Can eliminate the different cumulative errorss that produce of (+) length like this with (-) length owing to the HFM signal that is transfused to.Generally, in the middle of the HFM Bit data regenerating unit that uses PLL, the logic that (+) length and (-) length situation inequality is compensated need be set in addition.
Below just concrete understanding is carried out in the action of circled addition device 604 with reference to Fig. 9.
S901, at first circled addition device 604 is set at ' 0 '.
Whether S902 a phase shift takes place.
S904, whether above-mentioned circled addition device 604 takes place sampling value to be carried out continuous addition before a phase shift detects in 603 pairs of sampling values of last rheme phase shift detecting device.When above-mentioned sampling value is carried out addition, also carry out continuous detection (following S909) to whether circled addition taking place, above-mentioned so-called circled addition is meant along with the continuous addition of sampling value being surpassed the maximal value in the cycle values that above-mentioned groove length detecting device 605 generated or the situation of minimum value.At this moment will circulate the sign be set at ' 1 ' (following S910).
S903 if whether 603 pairs of sampling values of above-mentioned S902 meta phase shift detecting device a phase shift takes place detects, and just the terminating symbol of above-mentioned circled addition device 604 and the inclination symbol of circled addition device 604 is exported.The terminating symbol of so-called circled addition device 604 refers to the symbol that is added sampling value together so far; So-called inclination symbol is meant corresponding with it straight line inclination when showing the current sampling value that is transfused to linear function.
S905 after the above-mentioned numerical value of output, retrieves the action value of statistical indicant of circled addition device 604, and whether the action value of statistical indicant is 1.
S906, if it be set to ' 1 ' just it is changed be made as ' 0 ', just directly carry out next the action if not so.
S907 retrieves the circulation value of statistical indicant then, and whether the circulation value of statistical indicant is 1.
S908, if it be set to ' 1 ' just the action sign of circled addition device 604 and circulation sign be set at ' 0 ', direct execution in step 909 just if not so.
S909 judges whether to take place circled addition, if do not have, continues above-mentioned S902 step.
S910, if circled addition takes place, circulation sign=1.
Numerical value after 604 pairs of above-mentioned sampled quantizations of described circled addition device are handled carries out continuous addition, and its maximal value can not surpass (+) cycle values, and its minimum value can not surpass (-) cycle values yet.
Described bit-detector 606 relies on the numerical value of going up rheme phase shift detecting device 603 and circled addition device 604 to come the high frequency conversion pattern that is write down in the PIC zone is carried out data identification.Figure 10 shows its detailed method, when the position phase shift takes place, if circulation be masked as ' 1 ' just check the result and the inclination symbol of circled addition device 604, to groove and HFM data ' 0 ' judge.And flag of frame is set at ' 0 '.If the circulation be masked as ' 0 ' and flag of frame be ' 1 ' just export HFM Bit data ' 1 '.If flag of frame be ' 0 ' just flag of frame is set at ' 1 ' and do not export any HFM Bit data.
Below just this is described in detail with reference to Figure 10.
S1001, at first flag of frame is set at ' 0 '.
S1002, and detect whether a phase shift taking place.
S1003 if whether the numerical value that last rheme phase shift detecting device 603 is taken a sample a phase shift takes place detects, and just the numerical value of circulation sign is retrieved, and whether the numerical value of circulation sign is 1.
S1004, if the numerical value of above-mentioned circulation sign be set to ' 1 ', just the outcome symbol of circled addition device 604 and the inclination symbol of circled addition device 604 are compared.
S1005 is if both are identical just by HFM Bit data output ' 0 ' value.
S1006 just exports HFM Bit data groove if not so.
S1007, if the numerical value of circulation sign is not set among the above-mentioned S1003 ' 1 ' just the numerical value of flag of frame retrieved, and whether the numerical value of flag of frame is 1.
S1008, then, if flag of frame be set to ' 1 ' just by HFM Bit data output ' 1 '.
S1009, just flag of frame is set at if not so ' 1 '.
By above-mentioned explanation, those skilled in the art can carry out various change and modification fully in the scope that does not depart from this invention technological thought.But, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (9)
1, the data detection device in a kind of high-density CD permanent information and control data zone, the data detection device in permanent information and control data zone in the high density regeneration special-purpose cd of being responsible for the high density regeneration special-purpose cd that includes ingress area, data area and export area is regenerated is characterized in that comprising following ingredient:
In the specific region in above-mentioned CD ingress area, the logging mode of the high frequency modulated groove after handling through bi-phase modulated is discerned, the light that generates relevant therewith signal then picks up portion;
The high-frequency modulation signal of being discerned by the above-mentioned light portion of picking up is taken a sample and with its quantized analog/digital converter;
Utilize the symbol of above-mentioned sampling institute value to judge whether the position phase shift detecting device of presence bit phase shift;
The responsible circled addition device that the numerical value of above-mentioned sampling is carried out continuous addition;
After included groove mode is carried out length detection in the high-frequency modulation signal that the above-mentioned light portion of picking up is discerned, generate the groove length detecting device of above-mentioned circled addition device cycle values; And
When last rheme phase shift detecting device detects phase shift, the bit-detector that the bit column that is write down in the above-mentioned high frequency modulated groove is detected.
2, the Data Detection method in a kind of high-density CD permanent information and control data zone, the responsible method that the data in permanent information and control data zone in the high density regeneration special-purpose cd that includes ingress area, data area and export area are detected is characterized in that comprising following step:
In above-mentioned permanent information and control data zone, the high frequency modulated pattern after handling through bi-phase modulated is discerned, and it is carried out digitizing and sampling processing, then with its quantized step;
Utilize the interior included groove mode of above-mentioned high frequency modulated groove pattern to generate the step of cycle values;
Whether the numerical value after the above-mentioned sampling step that a phase shift is judged is taken place;
Numerical value after the above-mentioned sampling is carried out the step of continuous addition;
Is benchmark when the position phase shift to take place, the step that the bit of above-mentioned high frequency modulated groove pattern is detected.
3, the Data Detection method in high-density CD permanent information as claimed in claim 2 and control data zone is characterized in that:
The method of described generation cycle values is: the pattern that channelization is handled through the high frequency modulated ditch in above-mentioned permanent information and the control data zone is divided into the interval that comprises a groove pattern at least, then being object between each cut section, from above-mentioned groove pattern, the longest trench length is released by in the interval that splits, then these maximum trench length of between each cut section, extracting out, minimum length and maximum length are removed, again remaining length is averaged, and with this mean value and difference M addition, break it into two then, thereby obtain cycle values.
4, the Data Detection method in high-density CD permanent information as claimed in claim 3 and control data zone is characterized in that:
After generating above-mentioned cycle values, this value is exported to the circled addition device, and the action sign of above-mentioned circled addition device is set at ' 1 '.
5, the Data Detection method in high-density CD permanent information as claimed in claim 2 and control data zone is characterized in that:
The method of the numerical value of above-mentioned sampling gained being carried out continuous addition is: the sampling value that extracts in the middle of the high frequency modulated groove pattern that lasting accumulation is transfused to, when the position phase shift takes place till, if a position phase shift has taken place then, just export the symbol of above-mentioned accumulated value and be added in the inclination symbol of sampling value together at present.
6, the Data Detection method in high-density CD permanent information as claimed in claim 5 and control data zone is characterized in that:
Sampling value after above-mentioned addition has surpassed cycle values, and circulation sign just is set to ' 1 '.
7, the Data Detection method in high-density CD permanent information as claimed in claim 6 and control data zone is characterized in that:
When take place going up the rheme phase shift, if the numerical value of circulation sign be ' 1 ', so the current additive value of circled addition device be set to ' 0 '.
8, the Data Detection method in high-density CD permanent information as claimed in claim 6 and control data zone is characterized in that:
The method that the bit of above-mentioned high frequency modulated groove pattern after handling through bi-phase modulated is detected is: on taking place during the rheme phase shift, if circulation is masked as 1, so just according to the result of circled addition device and the bit decision with above-mentioned high frequency modulated pattern of tilting be ' 0 ', and flag of frame is set at ' 0 '.
9, the Data Detection method in high-density CD permanent information as claimed in claim 6 and control data zone is characterized in that:
To the above-mentioned method that detects through the bit of the high frequency modulated groove pattern after the bi-phase modulated processing be: when the position phase shift takes place, be masked as if circulate ' 0 ', so flag of frame just judge for ' 1 ' time the bit of above-mentioned two-phase groove pattern after handling through high frequency modulated be ' 1 ', if above-mentioned flag of frame be ' 0 ' just flag of frame is set at ' 1 ', do not export any data simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101124638A CN100508050C (en) | 2005-12-30 | 2005-12-30 | Data checking device and method for high-density CD permanent information and control data area |
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| CNB2005101124638A CN100508050C (en) | 2005-12-30 | 2005-12-30 | Data checking device and method for high-density CD permanent information and control data area |
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| CN1992057A true CN1992057A (en) | 2007-07-04 |
| CN100508050C CN100508050C (en) | 2009-07-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308691B (en) * | 2008-06-18 | 2011-01-19 | 北京博创汉威科技有限责任公司 | High-resolution disc signal quality detection apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308691B (en) * | 2008-06-18 | 2011-01-19 | 北京博创汉威科技有限责任公司 | High-resolution disc signal quality detection apparatus |
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| CN100508050C (en) | 2009-07-01 |
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