WO2006109505A1 - Audio output control device, method thereof, program thereof, and recording medium containing the program - Google Patents

Audio output control device, method thereof, program thereof, and recording medium containing the program Download PDF

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Publication number
WO2006109505A1
WO2006109505A1 PCT/JP2006/305917 JP2006305917W WO2006109505A1 WO 2006109505 A1 WO2006109505 A1 WO 2006109505A1 JP 2006305917 W JP2006305917 W JP 2006305917W WO 2006109505 A1 WO2006109505 A1 WO 2006109505A1
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WO
WIPO (PCT)
Prior art keywords
sound
state
sound output
state information
output
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Application number
PCT/JP2006/305917
Other languages
French (fr)
Japanese (ja)
Inventor
Hisashi Kihara
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 JP2007512478A priority Critical patent/JP4550888B2/en
Publication of WO2006109505A1 publication Critical patent/WO2006109505A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04SSTEREOPHONIC SYSTEMS 
    • H04S7/00Indicating arrangements; Control arrangements, e.g. balance control

Definitions

  • the present invention relates to a sound output control device that controls the state of sound output from sound output means, a method thereof, a program thereof, and a recording medium on which the program is recorded.
  • a playback device that is mounted on a mobile body such as a vehicle and plays back music recorded on a recording medium such as a CD (Compact Disc) is known.
  • a configuration is known in which the volume of music is corrected on the basis of noise generated by traveling of the vehicle (hereinafter referred to as traveling noise).
  • the configuration for correcting the volume of music based on this running noise detects the level of running noise via a microphone (hereinafter referred to as a microphone). Then, based on the detected level, the volume of the music is corrected so that the user can listen to the music even in an environment where traveling noise occurs.
  • a microphone hereinafter referred to as a microphone
  • the detection sensitivity of the microphone sound changes depending on the environmental temperature, and even a specific level of traveling noise is detected as a level that varies depending on the environmental temperature. There is a risk of it. For this reason, there is a problem that the volume of music may not be adjusted appropriately according to the running noise.
  • an object of the present invention is to provide a sound output control device, a method thereof, a program thereof, and a program thereof that appropriately control the state of sound that also outputs sound output means force. It is to provide a recorded recording medium.
  • the sound output control device of the present invention includes sound collection state information acquisition means for acquiring sound collection state information relating to an external sound state from sound collection means for collecting external sound, and Correction state information generating means for generating correction state information for correcting the state of the external sound, stop detection means for detecting a state where the moving body is stopped, and when the stop of the moving body is detected, Correction state information generation control means for generating the correction state information on the basis of the external sound state of the sound collection state information acquired by the sound collection state information acquisition means, sound output based on the correction state information Sound output state control means for controlling the state of the sound output by the means.
  • the sound output control method of the present invention is a sound output control method for controlling the state of the sound output by the sound output means, and is related to the state of the external sound. Acquisition of sound collection state information, generation of correction state information by correcting the external sound state of the sound collection state information, detection of a state where the moving body is stopped, and detection of stop of the mobile body And generating the correction state information based on the external sound state of the acquired sound collection state information, and controlling the sound state to be output by the sound output means based on the correction state information. It is characterized by.
  • the sound output control program of the present invention is characterized in that the computing means functions as the sound output control device of the present invention described above.
  • the sound output control program of the present invention is characterized by causing an arithmetic means to execute the above-described sound output control method of the present invention.
  • a recording medium on which the sound output control program of the present invention is recorded is characterized in that the above-described sound output control program of the present invention is recorded so as to be readable by an arithmetic means.
  • FIG. 1 is a block diagram showing a schematic configuration of a music playback system according to an embodiment of the present invention.
  • FIG. 2 is a block diagram showing a schematic configuration of an automatic sound volume correction unit in the embodiment.
  • FIG. 3 is a graph showing temperature characteristics of sound detection sensitivity in the microphone constituting the noise detection unit in the embodiment.
  • FIG. 4 is a flowchart showing an adjustment process of a detected noise level when the vehicle is stopped in the embodiment.
  • FIG. 5 is a flowchart showing a music volume correction process in the embodiment.
  • 451 AZD conversion means as means for acquiring sound collection status information
  • FIG. 1 is a block diagram showing a schematic configuration of a music playback system.
  • FIG. 2 is a block diagram showing a schematic configuration of the automatic sound volume correction unit.
  • FIG. 3 is a graph showing the temperature characteristics of the sound detection sensitivity in the microphone constituting the noise detection unit.
  • 100 is a music playback system.
  • This music playback system 100 is mounted on a moving body, for example, a vehicle, and automatically corrects the volume of the music to be played back appropriately based on sound other than music (hereinafter referred to as noise).
  • the music playback system 100 includes a music playback device 200, a sound generation means 500 as sound output means, and the like.
  • the music playback device 200 is mounted on a vehicle that is a moving body, and for example, music that is played back based on digital music data recorded on a CD (Compact Disc), an MD (Mini disc), or the like.
  • the volume of the song is automatically corrected as appropriate based on the noise.
  • the present invention is not limited to music data for playing back music, but may be audio data for outputting sound.
  • not only digital music data but also analog music data and audio data may be targeted.
  • music data and audio data transmitted using broadcast waves such as radio broadcasting and television broadcasting may be targeted.
  • the moving body is not limited to a vehicle, but a two-wheeled vehicle or an airplane.
  • the music playback device 200 includes a playback unit 300, an automatic volume correction unit 400, and the like.
  • the playback unit 300 Based on the music data, the playback unit 300 generates a digital audio signal Sa as output sound information for playing back the music at a volume set by the user, and appropriately sends it to the automatic volume correction unit 400. Output.
  • the playback unit 300 includes an input unit 310, a display unit 320, a storage unit 330, a processing unit 340, and the like.
  • the input unit 310 has various operation buttons (not shown), operation knobs, and the like that are input.
  • the contents of the input operation of these operation buttons and operation knobs are setting items such as setting of operation contents of the music playback device 200 such as selection of music to be played and volume setting.
  • the input unit 310 appropriately outputs a predetermined signal to the processing unit 340 and sets it by an input operation of setting items.
  • the input unit 310 is not limited to input operations such as operation buttons and operation knobs.
  • various setting items such as an input operation using a touch panel provided on the display unit 320 and an audio input operation can be set and input. Any configuration can be applied.
  • Display unit 320 is controlled by processing unit 340 to display a signal of image data from processing unit 340 on a screen.
  • Examples of the image data to be displayed on the screen include image data such as the name of the music being played, the playback time, and the set volume.
  • the storage unit 330 stores the reproduced music information so that it can be read out as appropriate.
  • various recording media such as optical discs such as CD, MD or DVD (Digital Versatile Disc), magnetic discs such as HD (Hard Disk), magneto-optical discs, memory cards, etc. Examples include a configuration including a drive and a driver for storing.
  • the reproduced music information is information regarding the music to be reproduced.
  • the playback music information is It includes music data, music accompanying information, and the like.
  • the music data is digital data used for music playback, that is, for generating the digital audio signal Sa.
  • the music accompanying information is information attached to the music such as the music performer and performance time.
  • the processing unit 340 includes input / output ports (not shown) such as an input port to which the input unit 310 is connected, a display port to which the display unit 320 is connected, a storage port to which the storage unit 330 is connected, automatic It has a correction port to which the volume correction unit 400 is connected.
  • input / output ports such as an input port to which the input unit 310 is connected, a display port to which the display unit 320 is connected, a storage port to which the storage unit 330 is connected, automatic It has a correction port to which the volume correction unit 400 is connected.
  • a digital audio signal Sa for playing the music at the set volume based on the music data of the playback music information is generated and output to the automatic volume correction unit 400. Further, the display means 320 appropriately displays various information based on the music playback time, volume, and music accompanying information.
  • the automatic volume correction unit 400 Based on the digital audio signal Sa for playing music at a predetermined volume from the playback unit 300, the automatic volume correction unit 400 performs correction for playing music at a volume corrected based on noise.
  • An analog audio signal Sb is generated and output to the sound generation means 500.
  • the automatic volume correction unit 400 includes a noise detection unit 410, a DSP (Digital Signa 1 Processor) 420, a D / A (Digital / Analog) conversion unit 430, an electronic volume 440, And a microcomputer 450 (hereinafter referred to as a microcomputer). Further, as shown in FIGS. 1 and 2, the microcomputer 450 is connected to a parking brake unit 600 as a braking means.
  • DSP Digital Signa 1 Processor
  • Parking brake unit 600 is used when braking the vehicle, for example, when the vehicle is parked.
  • the parking brake unit 600 includes an operation lever, a brake main body, a stop operation signal output means, and the like (not shown).
  • the control lever is located near the driver's seat.
  • the brake body brakes the vehicle when the operation lever is operated.
  • the stop operation signal output means outputs a stop operation signal Sc as braking operation state information to that effect to the microcomputer 450.
  • the noise detection unit 410 detects noise and detects the noise level (hereinafter referred to as the detected noise level).
  • the analog detected noise level signal corresponding to the above is output to the microcomputer 450.
  • the noise detection unit 410 includes a microphone (hereinafter referred to as a microphone) 411 as a sound collection unit, a microphone amplifier 412, and the like.
  • the microphone 411 is connected to the microphone amplifier 412.
  • the microphone 411 is a so-called electret condenser condenser microphone, and is disposed, for example, on an instrument panel in a vehicle interior space.
  • the microphone 411 may have any configuration such as a DC bias condenser type condenser microphone, a moving condenser type, a ribbon type dynamic microphone, a carbon microphone, or a crystal microphone.
  • the microphone 411 has characteristics as shown in FIG. That is, in FIG. 3, the three lines indicate the ambient temperature of the microphone (hereinafter referred to as the microphone sensitivity) of the sound detection sensitivity (hereinafter referred to as microphone sensitivity) in different microphones having the same configuration as the microphone 411. (Referred to as ambient temperature).
  • the microphone 411 has a characteristic that the microphone sensitivity gradually decreases when the ambient temperature of the microphone becomes approximately 40 ° C. or higher.
  • the microphone 411 detects the sound around the microphone 411 and generates a detection signal (hereinafter referred to as an analog detection signal) as analog sound collection state information corresponding to the detected sound level. Output to.
  • the microphone amplifier 412 is connected to the microcomputer 450. When acquiring the analog detection signal from the microphone 411, the microphone amplifier 412 amplifies the analog detection signal and outputs the amplified analog detection signal to the microphone 450.
  • the DSP 420 is connected to the processing unit 340 of the playback unit 300, the D / A conversion means 430, the microcomputer 450, and the like.
  • the DSP 420 acquires the digital audio signal Sa from the processing unit 340, processes it appropriately, and outputs it to the DZA conversion means 430.
  • the DSP 420 includes a tone level detection means 421 as output sound state information generation means.
  • Music sound level detection means 421 acquires the digital audio signal Sa, and based on the digital audio signal Sa, determines the level of the sound of the music (hereinafter referred to as musical sound) to be played at the volume set by the user. To detect.
  • a detected tone level signal as output tone status information corresponding to the detected tone level (hereinafter referred to as a detected tone level) is output to the microcomputer 450.
  • the DZ A conversion means 430 is connected to an electronic volume 440 or the like. This DZA conversion means 430 acquires the digital audio signal Sa from the DSP 420. The digital audio signal Sa is converted to an analog audio signal (hereinafter referred to as an analog audio signal) and output to the electronic volume 440.
  • the electronic volume 440 is connected to the microcomputer 450 or the like. This electronic volume 440 corrects the volume of the music output from the sound generation means 500 based on the analog audio signal under the control of the microcomputer 450. Specifically, the electronic volume 440 acquires an analog audio signal from the DZA conversion means 430. In addition, the microcomputer 450 obtains a corrected volume signal indicating that the volume of the music based on the analog audio signal is set to a volume corrected in accordance with noise (hereinafter referred to as corrected volume). Then, the electronic volume 440 generates a corrected analog audio signal Sb for outputting music at a volume corresponding to the corrected volume of the corrected volume signal based on the analog audio signal, and outputs it to the sound generation means 500.
  • corrected volume indicating that the volume of the music based on the analog audio signal is set to a volume corrected in accordance with noise
  • the microcomputer 450 controls the electronic volume 440 based on the noise and the detected tone level.
  • the microcomputer 450 functions as an AZD (Analog / Digital) conversion unit 451 as a sound collection state information acquisition unit, a digital attenuator 452 that also functions as a correction state information generation unit, and a correction state information generation unit.
  • the sound level control means 421 and the microcomputer 450 constitute the sound output control device of the present invention. Note that the sound output control device of the present invention may be configured without the musical sound level detection means 421.
  • the AZD conversion means 451 is connected to a microphone amplifier 412, a digital attenuator 452, and the like. This AZD conversion means 451 acquires an analog detection signal from the microphone amplifier 412. The analog detection signal is converted into a digital detection signal (hereinafter referred to as a digital detection signal) and output to the digital attenuator 452.
  • a digital detection signal hereinafter referred to as a digital detection signal
  • the digital attenuator 452 is connected to a noise level detection means 453, a gain control signal generation means 455, and the like.
  • This digital attenuator 452 is a gain control signal Under the control of the generating means 455, a process of appropriately amplifying the digital detection signal is performed. Specifically, the digital attenuator 452 obtains a digital detection signal from the AZD conversion means 451. Further, a gain control signal for setting the gain of the digital detection signal is obtained from the gain control signal generating means 455. Then, the digital detection signal is amplified by the gain of the gain control signal and output to the noise level detection means 453. In addition, the digital attenuator 452 amplifies the digital detection signal with the gain of the last gain control signal until a new gain control signal is acquired.
  • the noise level detection means 453 is connected to a gain control signal generation means 455, a volume control signal generation means 456, and the like.
  • the noise level detection means 453 detects the level of a sound having a predetermined frequency among the sounds corresponding to the digital detection signal. Specifically, the noise level detection means 453 obtains a digital detection signal amplified by the gain set by the gain control signal generation means 455 from the digital attenuator 452.
  • the sound level corresponding to the digital detection signal is detected at a frequency around 10Hz.
  • the sound level around 10 Hz in the sound of the engine and music of the vehicle or the voice of the passenger is low, and it is used for noise such as wind noise and road noise (hereinafter referred to as driving noise) generated by driving the vehicle.
  • the noise level detection means 453 mainly detects the level of running noise.
  • the noise level detecting means 453 recognizes the detected sound level around 10 Hz (hereinafter referred to as the detected noise level) and outputs a detected noise level signal as correction state information corresponding to the recognized detected noise level. Output to the gain control signal generation means 455 and the volume control signal generation means 456.
  • Stop detection means 454 is connected to gain control signal generation means 455, parking brake section 600, and the like.
  • the stop detection means 454 acquires the stop operation signal Sc from the parking brake unit 600, the stop detection means 454 recognizes that the vehicle is in a stop state. Then, a stop detection signal indicating that a stop has been detected is output to gain control signal generation means 455.
  • the gain control signal generation means 455 generates a gain control signal and outputs it to the digital attenuator 45 2. Specifically, when the gain control signal generation unit 455 acquires the stop detection signal from the stop detection unit 454, the gain control signal generation unit 455 outputs the detection noise level signal from the noise level detection unit 453.
  • the detected noise level is recognized based on the detected noise level signal.
  • the detected noise level recognized at this time is a noise level that does not include running noise because the vehicle stops.
  • the detected noise level is not a predetermined standard level (hereinafter referred to as a predetermined level)
  • the detected noise level signal having the detected noise level of the predetermined level is converted into the noise level detecting means 453.
  • the digital detection signal output by the digital attenuator 452 needs to be amplified.
  • the specified level is the detected noise level in a state where the ambient temperature of the microphone hardly affects the microphone sensitivity, for example, at 25 ° C as shown in Fig. 3 and the vehicle stops and no running noise is generated.
  • the gain control signal generation means 455 is a gain for causing the digital attenuator 452 to output a digital detection signal corresponding to the detection noise level of the specified level, for example, based on the difference between the detection noise level and the specified level. And a gain control signal related to this gain is output to the digital attenuator 452.
  • the volume control signal generation means 456 is connected to the musical sound level detection means 421, the electronic volume 440, and the like.
  • the volume control signal generation means 456 controls the electronic volume 440 to appropriately correct the volume of the music based on the detected noise level and the detected musical sound level.
  • the volume control signal generation unit 456 acquires the detected tone level signal from the tone level detection unit 421, and recognizes the detected tone level.
  • a detected noise level signal is acquired from the noise level detecting means 453, and the detected noise level is recognized.
  • the noise level in the audible band is calculated based on the detected noise level, that is, the level of sound around 10 Hz in the noise.
  • the calculated noise level in the audible band is substantially the same as the traveling noise level in the audible band.
  • the level of the tone that can be heard by the user due to the so-called masking effect of the running noise (hereinafter referred to as the audible level) is reduced.
  • a correction volume for correcting the audibility level to a predetermined level for example, approximately the same level as when no running noise is present, is calculated, and this is calculated.
  • a corrected volume signal relating to the corrected volume of the sound is output to the electronic volume 440.
  • the sound generation means 500 includes speakers (not shown) disposed on the left and right sides of the front portion and the rear portion in the vehicle interior space, such as an instrument panel portion, a door portion, and a rear dashboard portion, for example. Yes. Then, the sound generation means 500 is controlled by the music playback device 200, acquires the corrected analog audio signal Sb output from the music playback device 200, and based on the noise based on the corrected analog audio signal Sb. Output the music at the corrected volume.
  • FIG. 4 is a flowchart showing a process for adjusting the detected noise level when the vehicle is stopped.
  • FIG. 5 is a flowchart showing the music volume correction processing.
  • the automatic sound volume correction unit 400 of the music playback device 200 causes the stop detection means 454 of the microcomputer 450 to operate the operation lever of the parking brake unit 600 as shown in FIG.
  • a stop detection signal is output to the gain control signal generation means 455.
  • the gain control signal generating means 455 Based on the detected noise level signal from the noise level detecting means 453, the gain control signal generating means 455 recognizes the detected noise level when the vehicle is stopped detected by the noise detecting section 410, and the detected noise level is It is determined whether or not it is at a specified level (step S102).
  • step S102 if it is determined in step S102 that the level is not the specified level, the gain of the digital detection signal for setting the detected noise level to the specified level is calculated. Then, the gain control signal generation means 455 performs a process of outputting the gain control signal to the digital attenuator 452, that is, a process of adjusting the digital attenuator 452 so that the detected noise level at the time of stopping becomes a specified bell. (Step S103), the process ends.
  • the playback unit 300 of the music playback device 200 outputs a digital audio signal Sa for playing back the music selected by the user at a volume set by the user to the automatic volume correction unit 400.
  • the automatic sound volume correction unit 400 acquires the digital audio signal Sa from the playback unit 300 by the musical sound level detection means 421 of the DSP 420
  • the automatic sound volume correction unit 400 outputs the detected musical sound level signal to the volume control signal generation means 456 based on the digital audio signal Sa.
  • the volume control signal generation means 456 recognizes the detected musical tone level of the music whose volume has been set by the user based on the detected musical tone level signal (step S201).
  • the noise level detection means 453 obtains a digital detection signal amplified by the gain set by the gain control signal generation means 455 by the digital attenuator 452, and detects based on the digital detection signal.
  • the noise level signal is output to the volume control signal generation means 456.
  • the volume control signal generating means 456 recognizes the detected noise level of the sound near 10 Hz based on the detected noise level signal (step S202).
  • the detected noise level detected in step S202 is substantially the same as the level of traveling noise.
  • the volume control signal generation means 456 calculates a corrected volume based on the detected musical sound level and the detected noise level (step S 203), and outputs the corrected volume signal to the electronic volume 440.
  • the electronic volume 440 performs a volume correction process based on the corrected volume signal or the like (step S204) and ends the process. Specifically, the electronic volume 440 corrects the volume of the music to a volume corresponding to the corrected volume based on the corrected volume signal and the analog audio signal, that is, the audible level is in the absence of running noise.
  • the sound is output from the sound generation means 500 by correcting the volume to be substantially the same as the level in.
  • the automatic volume correction unit 400 of the music playback device 200 detects the sound around the microphone 411 by the noise detection unit 410 and performs analog detection corresponding to the level of this sound.
  • the signal is output to the microcomputer 450.
  • microcomputer 450 AZD conversion Means 451 acquires an analog detection signal, converts this analog detection signal into a digital detection signal, and outputs it to digital attenuator 452.
  • the digital attenuator 452 amplifies the digital detection signal with the gain of the gain control signal acquired from the gain control signal generation unit 455 and outputs the amplified signal to the noise level detection unit 453.
  • the noise level detection means 453 recognizes the noise level based on the digital detection signal, and outputs a detected noise level signal related to the noise level to the volume control signal generation means 456. Further, the volume control signal generation means 456 calculates a corrected volume based on the noise level of the detected noise level signal, outputs a corrected volume signal related to the corrected volume to the electronic volume 440, and is corrected based on the noise level. Processes to output music from the sound generator 500 at volume. Then, the gain control signal generation means 455 is a gain for causing the digital attenuator 452 to output a digital detection signal corresponding to a predetermined noise level when the stop detection means 454 recognizes that the vehicle has stopped. The gain control signal of this gain is output to the digital attenuator 452.
  • the music playback device 200 adjusts the digital attenuator 452 so that the noise level when the vehicle stops is at the specified level, so that the microphone sensitivity of the microphone 411 differs depending on the ambient temperature of the microphone. Even so, a specific level of noise can be detected as the same level of noise, and the volume of the music output by the sounding means 500 can be appropriately corrected according to the noise level, regardless of the microphone sensitivity. In other words, for example, as shown in Fig.
  • the volume of the music output by the sounding means 500 can be appropriately corrected according to the noise level.
  • the digital attenuator 452 is adjusted so that the noise level in a state where no traveling noise is generated becomes a specified level, the traveling noise, that is, the level of noise generated during traveling can be easily calculated.
  • the music playback device 200 is used for the music output from the sound generation means 500 that does not allow the user to perceive a sense of incongruity caused by a change in microphone sensitivity accompanying a change in microphone ambient temperature.
  • the state can be controlled appropriately.
  • the microphone sensitivity of the microphone 411 varies for each music playback device 200 Even so, there is no need to adjust the microphone sensitivity of each microphone 411. Therefore, it is possible to prevent an increase in the size of the music playback device 200 that does not require the noise detection unit 410 to be provided with a member for adjusting the microphone sensitivity. Furthermore, it is not necessary to provide facilities and processes for adjusting the microphone sensitivity.
  • the cost of the music playback device 200 can be reduced and the productivity can be improved. This is particularly effective in a configuration that recognizes a sound level in the vicinity of 10 Hz, in which microphone sensitivity is generally not guaranteed as in the above-described embodiment, and there is a risk that sensitivity variation may be large between the microphones 411.
  • the volume control signal generating means 456 corrects the volume of the music based on the noise level. For this reason, the music playback device 200 may cause a situation in which the user cannot listen to the music due to the masking effect of the running noise by correcting the volume of the music even when the running noise is high. Absent. Therefore, the music reproducing device 200 can more appropriately control the output state of the music.
  • the volume control signal generation means 456 acquires the detected musical sound level signal from the musical sound level detection means 421, and detects the detected musical sound level, that is, the sound level of the music reproduced at the volume set by the user. Recognize Based on the detected musical sound level and the detected noise level, it calculates the correction volume for correcting the audibility level to a level that is almost the same as the level in the presence / absence of driving noise! Then, a corrected volume signal is output. For this reason, the music reproducing device 200 can allow the user to listen to the music in a state where the audibility level is maintained at a predetermined level regardless of the running noise. Therefore, the music reproducing device 200 can more appropriately control the output state of the music.
  • the noise level detection means 453 recognizes the detected noise level, that is, the level of the sound having a frequency near 10 Hz among the sounds corresponding to the digital detection signal, and generates a volume control signal based on the detected noise level.
  • Means 456 calculates the correction volume. For this reason, the music playback device 200 corrects the volume of the music based on the sound that is low in the engine sound, music sound, or voice of the vehicle, and that the level in the running noise is high around 10 Hz. Inappropriate processing that corrects the volume based on engine sound, musical sound, or speech is not performed. Therefore, the music reproducing device 200 can further appropriately control the output state of the music.
  • stop detection means 454 recognizes that the vehicle has stopped when it detects that parking brake unit 600 has been operated to brake the vehicle. For this reason, the music reproducing device 200 recognizes the stop based on the operation state of the parking brake unit 600 that is mainly used when the vehicle is stopped. For example, the operation state of the foot brake that is used also when the vehicle is decelerated. Compared with the configuration for recognizing the stop based on the state, the stop can be reliably recognized. In addition, since the stop is recognized based on the operation state of the parking brake unit 600 which is conventional in the vehicle, the stop can be recognized with a simple configuration without providing a special configuration.
  • the microphone 411 an electret condenser microphone is applied. For this reason, the size and weight can be easily reduced, and the inexpensive microphone 411 is used. Therefore, the music reproducing device 200 can be easily reduced in size, weight, and cost.
  • the present invention is not limited to the above-described embodiment, but includes the following modifications as long as the object of the present invention can be achieved.
  • the composition for correcting the sound quality of the music based on the sound quality of the noise that is, the output state of the music to the state where the output of only the sound having the frequency at which the audibility level has decreased due to the masking effect of the running noise in the music is increased. It is good also as composition which corrects.
  • the output state of the music may be corrected so as to increase the output of only the sound having a height at which the audibility level has decreased due to the masking effect of running noise. With such a configuration, the sound quality of the music that the user can listen to changes due to the masking effect of the running noise, so that the user does not feel uncomfortable. Therefore, the music playback device 200 can more appropriately control the output state of the music.
  • the sound volume control signal generating means 456 may be configured to output the corrected sound volume signal based only on the detected noise level. With this configuration, it is possible to simplify the configuration of the DSP 420 without the need to provide the musical tone level detection means 421 in the DSP 420. Furthermore, the volume control signal generation means 456 can easily calculate the corrected volume compared to the configuration of the above embodiment.
  • the noise level detecting means 453 allows the sound corresponding to the digital detection signal. It is good also as a structure which recognizes the level of the sound of the frequency of a listening band.
  • the configuration of the volume control signal generation means 456 can be simplified, in which it is not necessary to provide the volume control signal generation means 456 with a function of calculating the noise level in the audible band based on the sound level of a frequency around 10 Hz. Further, since the microphone sensitivity is generally guaranteed at frequencies in the audible band, the performance variation between the music playback devices 200 can be minimized.
  • the noise level detection means 453 may be configured to recognize the level of sound in a non-audible band other than 10 Hz.
  • the stop detection means 454 recognizes that the foot brake has been operated to brake the vehicle or that the transmission gear has been operated to be in a neutral state
  • the stop is recognized. It is good also as a structure.
  • it may be configured to recognize the stop based on the vehicle speed pulse signal. With such a configuration, it is possible to recognize a stop based on the foot brake, speed change gear, or vehicle speed pulse signal existing in the vehicle, so it is possible to recognize the stop with a simple configuration without any special configuration. it can.
  • the stop detection means 454 obtains movement state information related to the movement state of the vehicle (not shown) as the movement state notification processing means, and recognizes the stop based on the movement state information. It is good. With such a configuration, the movement state information used in the navigation device can be used effectively.
  • digital or analog signal level adjustment means that can be adjusted by the microcomputer 450, such as a VCA (Voltage Controlled Amplifier) or an electronic volume, may be applied.
  • VCA Voltage Controlled Amplifier
  • the digital audio signal Sa input to the automatic sound volume correction unit 400 may be an analog audio signal, and the musical sound level detection means 421 may be configured by an analog circuit.
  • the configuration in which the sound output control device of the present invention is applied to the music playback device 200 has been shown as an example.
  • the present invention is not limited to this. It may be configured to be applied to various devices that output sound, such as a John receiver, a game device or a personal computer that outputs sound or music, or a radio receiver that outputs radio broadcast sound or music.
  • the present invention may be applied to the above-described various devices that are not limited to being mounted on a vehicle. And the above-mentioned various types of music playback devices, etc. It is good also as a structure which connects the sound output control apparatus of this invention comprised separately to the apparatus.
  • the sound output control device of the present invention may have a configuration in which the microcomputer 450 and the musical tone level detecting means 421 are made independent.
  • the music reproducing device 200 acquires an analog detection signal corresponding to the sound level around the microphone 411 detected by the noise detection unit 410 by the microcomputer 450.
  • the microcomputer 450 amplifies the digital detection signal corresponding to the analog detection signal with the gain of the gain control signal obtained from the gain control signal generation means 455 and outputs it to the noise level detection means 453 by the digital attenuator 452. To do.
  • the microcomputer 450 controls the operation of the electronic volume 440 by the volume control signal generation means 456, and generates the sound with the corrected volume based on the noise level detected by the noise level detection means 453 based on the digital detection signal.
  • the music is output from the means 500.
  • the microcomputer 450 sends a digital detection signal corresponding to the specified noise level to the digital attenuator 452.
  • a gain control signal related to the gain to be output is generated and output to the digital attenuator 452.
  • the music playback device 200 adjusts the digital attenuator 452 so that the level of noise when the vehicle stops is at the specified level, so the microphone sensitivity of the microphone 411 differs according to the ambient temperature of the microphone. Even in this case, a specific level of noise can be detected as the same level of noise, and the state of the music output from the sounding means 500 can be appropriately corrected according to the noise level regardless of the microphone sensitivity.
  • the music playback device 200 shows the state of the music to be output from the sound generation means 500 that does not allow the user to perceive a sense of incongruity caused by a change in microphone sensitivity due to a change in microphone ambient temperature. It can be controlled appropriately.
  • the present invention can be used for a sound output control device that controls the state of sound output from sound output means, a method thereof, a program thereof, and a recording medium on which the program is recorded.

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  • Engineering & Computer Science (AREA)
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Abstract

An automatic sound volume correction unit (400) of a music composition reproducing device uses a digital attenuator (452) for amplifying a digital detection signal corresponding to the level of the sound detected by a noise detection unit (410) by a gain of the gain control signal acquired from gain control signal generation means (455) and outputting it to noise level detection means (453). Sound volume control signal generation means (456) controls an electronic volume (440) so as to output a music composition from sound generation means with a corrected sound volume corresponding to the noise level based on the digital detection signal. When the gain control signal generation means (455) recognizes that the vehicle has stopped, it generates and outputs a gain control signal relating to a gain for the digital attenuator (452) to output a digital detection signal corresponding to a noise level of a predetermined level.

Description

明 細 書  Specification
音出力制御装置、その方法、そのプログラム、および、そのプログラムを 記録した記録媒体  SOUND OUTPUT CONTROL DEVICE, ITS METHOD, ITS PROGRAM, AND RECORDING MEDIUM CONTAINING THE PROGRAM
技術分野  Technical field
[0001] 本発明は、音出力手段から出力させる音の状態を制御する音出力制御装置、その 方法、そのプログラム、および、そのプログラムを記録した記録媒体に関する。  The present invention relates to a sound output control device that controls the state of sound output from sound output means, a method thereof, a program thereof, and a recording medium on which the program is recorded.
背景技術  Background art
[0002] 従来、移動体である例えば車両に搭載され、例えば CD (Compact Disc)などの記 録媒体に記録された楽曲を再生する再生装置が知られている。そして、このような再 生装置において、車両の走行により生じる騒音 (以下、走行騒音と称す)に基づいて 、楽曲の音量を補正する構成が知られている。  [0002] Conventionally, a playback device that is mounted on a mobile body such as a vehicle and plays back music recorded on a recording medium such as a CD (Compact Disc) is known. In such a reproduction apparatus, a configuration is known in which the volume of music is corrected on the basis of noise generated by traveling of the vehicle (hereinafter referred to as traveling noise).
[0003] この走行騒音に基づいて楽曲の音量を補正する構成は、マイクロフォン (以下、マ イクと称す)を介して走行騒音のレベルを検出する。そして、この検出したレベルに基 づいて、走行騒音が生じる環境下であっても利用者が楽曲を聴取可能な状態に、楽 曲の音量を補正する。  [0003] The configuration for correcting the volume of music based on this running noise detects the level of running noise via a microphone (hereinafter referred to as a microphone). Then, based on the detected level, the volume of the music is corrected so that the user can listen to the music even in an environment where traveling noise occurs.
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
[0004] し力しながら、上述したような構成では、例えば環境温度によりマイクの音の検出感 度が変化してしまい、特定のレベルの走行騒音であっても環境温度によって異なるレ ベルとして検出してしまうおそれがある。このため、走行騒音に応じて楽曲の音量を 適切に調整できないおそれがあるという問題点が一例として挙げられる。  However, in the configuration as described above, for example, the detection sensitivity of the microphone sound changes depending on the environmental temperature, and even a specific level of traveling noise is detected as a level that varies depending on the environmental temperature. There is a risk of it. For this reason, there is a problem that the volume of music may not be adjusted appropriately according to the running noise.
[0005] 本発明の目的は、このような実情などに鑑みて、音出力手段力も出力させる音の状 態を適切に制御する音出力制御装置、その方法、そのプログラム、および、そのプロ グラムを記録した記録媒体を提供することである。  [0005] In view of such a situation, an object of the present invention is to provide a sound output control device, a method thereof, a program thereof, and a program thereof that appropriately control the state of sound that also outputs sound output means force. It is to provide a recorded recording medium.
課題を解決するための手段  Means for solving the problem
[0006] 本発明の音出力制御装置は、外部の音を集音する集音手段から外部の音の状態 に関する集音状態情報を取得する集音状態情報取得手段と、前記集音状態情報の 外部の音の状態を補正した補正状態情報を生成する補正状態情報生成手段と、移 動体が停止している状態を検出する停止検出手段と、前記移動体の停止が検出さ れた際に前記集音状態情報取得手段で取得された前記集音状態情報の外部の音 の状態を基準にして前記補正状態情報を生成させる補正状態情報生成制御手段と 、前記補正状態情報に基づいて、音出力手段で出力させる音の状態を制御する音 出力状態制御手段と、を具備したことを特徴とする。 [0006] The sound output control device of the present invention includes sound collection state information acquisition means for acquiring sound collection state information relating to an external sound state from sound collection means for collecting external sound, and Correction state information generating means for generating correction state information for correcting the state of the external sound, stop detection means for detecting a state where the moving body is stopped, and when the stop of the moving body is detected, Correction state information generation control means for generating the correction state information on the basis of the external sound state of the sound collection state information acquired by the sound collection state information acquisition means, sound output based on the correction state information Sound output state control means for controlling the state of the sound output by the means.
[0007] 本発明の音出力制御方法は、音出力手段で出力させる音の状態を制御する音出 力制御方法であって、外部の音を集音する集音手段力 外部の音の状態に関する 集音状態情報を取得し、前記集音状態情報の外部の音の状態を補正した補正状態 情報を生成し、移動体が停止している状態を検出し、前記移動体の停止が検出され た際に前記取得された前記集音状態情報の外部の音の状態を基準にして前記補正 状態情報を生成させ、前記補正状態情報に基づいて、音出力手段で出力させる音 の状態を制御することを特徴とする。  [0007] The sound output control method of the present invention is a sound output control method for controlling the state of the sound output by the sound output means, and is related to the state of the external sound. Acquisition of sound collection state information, generation of correction state information by correcting the external sound state of the sound collection state information, detection of a state where the moving body is stopped, and detection of stop of the mobile body And generating the correction state information based on the external sound state of the acquired sound collection state information, and controlling the sound state to be output by the sound output means based on the correction state information. It is characterized by.
[0008] 本発明の音出力制御プログラムは、演算手段を前述した本発明の音出力制御装 置として機能させることを特徴とする。  [0008] The sound output control program of the present invention is characterized in that the computing means functions as the sound output control device of the present invention described above.
[0009] 本発明の音出力制御プログラムは、前述した本発明の音出力制御方法を演算手 段に実行させることを特徴とする。  [0009] The sound output control program of the present invention is characterized by causing an arithmetic means to execute the above-described sound output control method of the present invention.
[0010] 本発明の音出力制御プログラムを記録した記録媒体は、前述した本発明の音出力 制御プログラムが演算手段にて読取可能に記録されたことを特徴とする。  [0010] A recording medium on which the sound output control program of the present invention is recorded is characterized in that the above-described sound output control program of the present invention is recorded so as to be readable by an arithmetic means.
図面の簡単な説明  Brief Description of Drawings
[0011] [図 1]本発明の一実施の形態に係る楽曲再生システムの概略構成を示すブロック図 である。  FIG. 1 is a block diagram showing a schematic configuration of a music playback system according to an embodiment of the present invention.
[図 2]前記一実施の形態における自動音量補正部の概略構成を示すブロック図であ る。  FIG. 2 is a block diagram showing a schematic configuration of an automatic sound volume correction unit in the embodiment.
[図 3]前記一実施の形態における騒音検出部を構成するマイクロフォンにおける音の 検出感度の温度特性を示すグラフである。  FIG. 3 is a graph showing temperature characteristics of sound detection sensitivity in the microphone constituting the noise detection unit in the embodiment.
[図 4]前記一実施の形態における停車時における検出騒音レベルの調整処理を示 すフローチャートである。 [図 5]前記一実施の形態における楽曲の音量補正処理を示すフローチャートである。 符号の説明 FIG. 4 is a flowchart showing an adjustment process of a detected noise level when the vehicle is stopped in the embodiment. FIG. 5 is a flowchart showing a music volume correction process in the embodiment. Explanation of symbols
[0012] 411 集音手段としてのマイクロフォン(マイク)  [0012] 411 Microphone (microphone) as sound collection means
421 音出力制御装置を構成する出力音状態情報生成手段としての楽音レベル 検出手段  421 Music level detection means as output sound state information generation means constituting sound output control device
450 音出力制御装置を構成するマイクロコンピュータ (マイコン)  450 Microcomputer that constitutes the sound output control device
451 集音状態情報取得手段としての AZD変換手段  451 AZD conversion means as means for acquiring sound collection status information
452 補正状態情報生成手段としても機能するデジタルアツテネータ  452 Digital attenuator that also functions as a means for generating correction status information
453 補正状態情報生成手段としても機能する騒音レベル検出手段  453 Noise level detection means that also functions as correction state information generation means
454 停止検出手段としての停車検出手段  454 Stop detection means as stop detection means
455 補正状態情報生成制御手段としての利得制御信号生成手段  455 Gain Control Signal Generation Unit as Correction State Information Generation Control Unit
456 音出力状態制御手段としての音量制御信号生成手段  456 Volume control signal generation means as sound output state control means
500 音出力手段としての発音手段  500 Sound output means as sound output means
¾a 出力音情報としてのデジタルオーディオ信号  ¾a Digital audio signal as output sound information
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0013] 以下、本発明に係る一実施の形態を図面に基づいて説明する。本実施の形態で は、本発明の音出力制御装置を有する車載用の楽曲再生装置を備えた楽曲再生シ ステムを例示して説明する。図 1は、楽曲再生システムの概略構成を示すブロック図 である。図 2は、自動音量補正部の概略構成を示すブロック図である。図 3は、騒音 検出部を構成するマイクロフォンにおける音の検出感度の温度特性を示すグラフで ある。  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. In the present embodiment, a music playback system including an in-vehicle music playback device having the sound output control device of the present invention will be described as an example. FIG. 1 is a block diagram showing a schematic configuration of a music playback system. FIG. 2 is a block diagram showing a schematic configuration of the automatic sound volume correction unit. FIG. 3 is a graph showing the temperature characteristics of the sound detection sensitivity in the microphone constituting the noise detection unit.
[0014] 〔楽曲再生システムの構成〕  [Configuration of music playback system]
図 1において、 100は楽曲再生システムである。この楽曲再生システム 100は、移 動体である例えば車両に搭載され、再生する楽曲の音量を楽曲以外の音 (以下、騒 音と称す)に基づいて適宜自動的に補正する。そして、楽曲再生システム 100は、楽 曲再生装置 200と、音出力手段としての発音手段 500と、などを備えている。  In FIG. 1, 100 is a music playback system. This music playback system 100 is mounted on a moving body, for example, a vehicle, and automatically corrects the volume of the music to be played back appropriately based on sound other than music (hereinafter referred to as noise). The music playback system 100 includes a music playback device 200, a sound generation means 500 as sound output means, and the like.
[0015] 楽曲再生装置 200は、移動体である車両に搭載され、例えば CD (Compact Disc) 、 MD (Mini disc)などに記録されたデジタルの楽曲データに基づいて再生される楽 曲の音量を騒音に基づいて適宜自動補正する。なお、楽曲を再生するための楽曲 データに限らず、音声を出力させるための音声データを対象としてもよい。また、デジ タルの楽曲データに限らず、アナログの楽曲データや音声データを対象としてもよい 。さらに、ラジオ放送やテレビ放送など放送波を利用して送信される楽曲データや音 声データを対象としてもよい。また、移動体としては、車両に限らず、二輪車、飛行機[0015] The music playback device 200 is mounted on a vehicle that is a moving body, and for example, music that is played back based on digital music data recorded on a CD (Compact Disc), an MD (Mini disc), or the like. The volume of the song is automatically corrected as appropriate based on the noise. Note that the present invention is not limited to music data for playing back music, but may be audio data for outputting sound. Moreover, not only digital music data but also analog music data and audio data may be targeted. Furthermore, music data and audio data transmitted using broadcast waves such as radio broadcasting and television broadcasting may be targeted. In addition, the moving body is not limited to a vehicle, but a two-wheeled vehicle or an airplane.
、船舶などいずれの移動体が対象となる。そして、楽曲再生装置 200は、再生部 300 と、自動音量補正部 400と、などを備えている。 Any moving body such as a ship is a target. The music playback device 200 includes a playback unit 300, an automatic volume correction unit 400, and the like.
[0016] 再生部 300は、楽曲データに基づいて、楽曲を利用者により設定された音量で再 生するための出力音情報としてのデジタルオーディオ信号 Saを生成して、自動音量 補正部 400へ適宜出力する。そして、再生部 300は、入力手段 310と、表示手段 32 0と、記憶手段 330と、処理部 340と、などを備えている。  [0016] Based on the music data, the playback unit 300 generates a digital audio signal Sa as output sound information for playing back the music at a volume set by the user, and appropriately sends it to the automatic volume correction unit 400. Output. The playback unit 300 includes an input unit 310, a display unit 320, a storage unit 330, a processing unit 340, and the like.
[0017] 入力手段 310は、入力操作される図示しない各種操作ボタンや操作つまみなどを 有している。この操作ボタンや操作つまみの入力操作の内容は、再生する楽曲の選 択ゃ音量の設定など楽曲再生装置 200の動作内容の設定などの設定事項である。 入力手段 310は、設定事項の入力操作により、所定の信号を処理部 340へ適宜出 力して設定させる。なお、この入力手段 310としては、操作ボタンや操作つまみなど の入力操作に限らず、例えば表示手段 320に設けられたタツチパネルによる入力操 作や、音声による入力操作など、各種設定事項を設定入力可能ないずれの構成を 適用できる。  The input unit 310 has various operation buttons (not shown), operation knobs, and the like that are input. The contents of the input operation of these operation buttons and operation knobs are setting items such as setting of operation contents of the music playback device 200 such as selection of music to be played and volume setting. The input unit 310 appropriately outputs a predetermined signal to the processing unit 340 and sets it by an input operation of setting items. The input unit 310 is not limited to input operations such as operation buttons and operation knobs. For example, various setting items such as an input operation using a touch panel provided on the display unit 320 and an audio input operation can be set and input. Any configuration can be applied.
[0018] 表示手段 320は、処理部 340にて制御され処理部 340からの画像データの信号を 画面表示させる。この画面表示させる画像データとしては、再生中の楽曲の曲名や 再生時間、設定されている音量などの画像データが例示できる。  Display unit 320 is controlled by processing unit 340 to display a signal of image data from processing unit 340 on a screen. Examples of the image data to be displayed on the screen include image data such as the name of the music being played, the playback time, and the set volume.
[0019] 記憶手段 330は、再生楽曲情報を適宜読み出し可能に記憶する。この記憶手段 3 30としては、 CDや MDあるいは DVD (Digital Versatile Disc)などの光ディスク、 HD (Hard Disk)などの磁気ディスク、光磁気ディスク、メモリカードなどの各種記録媒体 力 各種情報を読み出し可能に記憶するドライブやドライバなどを備えた構成などが 例示できる。  The storage unit 330 stores the reproduced music information so that it can be read out as appropriate. As this storage means 330, various recording media such as optical discs such as CD, MD or DVD (Digital Versatile Disc), magnetic discs such as HD (Hard Disk), magneto-optical discs, memory cards, etc. Examples include a configuration including a drive and a driver for storing.
[0020] 再生楽曲情報は、再生する楽曲に関する情報である。そして、再生楽曲情報は、 楽曲データと、楽曲付帯情報と、などを備えている。楽曲データは、楽曲の再生、す なわちデジタルオーディオ信号 Saの生成の際に用いられるデジタルのデータである 。楽曲付帯情報は、楽曲の演奏者、演奏時間など楽曲に付帯する情報である。 [0020] The reproduced music information is information regarding the music to be reproduced. And the playback music information is It includes music data, music accompanying information, and the like. The music data is digital data used for music playback, that is, for generating the digital audio signal Sa. The music accompanying information is information attached to the music such as the music performer and performance time.
[0021] 処理部 340は、図示しない各入出力ポート、例えば入力手段 310が接続される入 力ポート、表示手段 320が接続される表示ポート、記憶手段 330が接続される記憶ポ ート、自動音量補正部 400が接続される補正ポートなどを有している。この処理部 34 0は、入力手段 310から楽曲の音量を設定する旨の操作信号を取得すると、この設 定された音量で楽曲を再生する旨を認識する。また、入力手段 310から所定の楽曲 を再生する旨の操作信号を取得すると、この楽曲に対応する再生楽曲情報を検索す る。そして、この再生楽曲情報の楽曲データに基づく楽曲を設定された音量で再生 するためのデジタルオーディオ信号 Saを生成して、自動音量補正部 400へ出力する 。また、表示手段 320に、楽曲の再生時間、音量、楽曲付帯情報に基づく各種情報 を適宜表示させる。 [0021] The processing unit 340 includes input / output ports (not shown) such as an input port to which the input unit 310 is connected, a display port to which the display unit 320 is connected, a storage port to which the storage unit 330 is connected, automatic It has a correction port to which the volume correction unit 400 is connected. When the processing unit 340 obtains an operation signal for setting the volume of the music from the input unit 310, the processing unit 340 recognizes that the music is played with the set volume. Further, when an operation signal for reproducing a predetermined music is acquired from the input means 310, the reproduction music information corresponding to this music is searched. Then, a digital audio signal Sa for playing the music at the set volume based on the music data of the playback music information is generated and output to the automatic volume correction unit 400. Further, the display means 320 appropriately displays various information based on the music playback time, volume, and music accompanying information.
[0022] 自動音量補正部 400は、再生部 300から所定の音量で楽曲を再生するためのデ ジタルオーディォ信号 Saに基づ 、て、騒音に基づき補正した音量で楽曲を再生する ための補正アナログオーディオ信号 Sbを生成して発音手段 500へ出力する。そして 、自動音量補正部 400は、図 2に示すように、騒音検出部 410と、 DSP (Digital Signa 1 Processor) 420と、 D/A (Digital/Analog)変換手段 430と、電子ボリューム 440と、 マイクロコンピュータ(以下、マイコンと称す) 450と、などを備えている。また、マイコン 450には、図 1および図 2に示すように、制動手段としてのパーキングブレーキ部 600 が接続されている。  [0022] Based on the digital audio signal Sa for playing music at a predetermined volume from the playback unit 300, the automatic volume correction unit 400 performs correction for playing music at a volume corrected based on noise. An analog audio signal Sb is generated and output to the sound generation means 500. Then, as shown in FIG. 2, the automatic volume correction unit 400 includes a noise detection unit 410, a DSP (Digital Signa 1 Processor) 420, a D / A (Digital / Analog) conversion unit 430, an electronic volume 440, And a microcomputer 450 (hereinafter referred to as a microcomputer). Further, as shown in FIGS. 1 and 2, the microcomputer 450 is connected to a parking brake unit 600 as a braking means.
[0023] パーキングブレーキ部 600は、例えば車両を駐車させる際など車両を制動させる際 に利用される。このパーキングブレーキ部 600は、図示しない、操作レバーと、ブレー キ本体と、停車操作信号出力手段と、などを備えている。操作レバーは、運転席近傍 に配置されている。ブレーキ本体は、操作レバーが操作されると、車両を制動させる 。停車操作信号出力手段は、操作レバーが車両を制動させる状態に操作されると、 その旨の制動操作状態情報としての停車操作信号 Scをマイコン 450へ出力する。  [0023] Parking brake unit 600 is used when braking the vehicle, for example, when the vehicle is parked. The parking brake unit 600 includes an operation lever, a brake main body, a stop operation signal output means, and the like (not shown). The control lever is located near the driver's seat. The brake body brakes the vehicle when the operation lever is operated. When the operation lever is operated to brake the vehicle, the stop operation signal output means outputs a stop operation signal Sc as braking operation state information to that effect to the microcomputer 450.
[0024] 騒音検出部 410は、騒音を検出して、この騒音のレベル (以下、検出騒音レベルと 称す)に対応するアナログの検出騒音レベル信号をマイコン 450へ出力する。そして 、騒音検出部 410は、集音手段としてのマイクロフォン (以下、マイクと称す) 411と、 マイクアンプ 412と、などを備えている。 [0024] The noise detection unit 410 detects noise and detects the noise level (hereinafter referred to as the detected noise level). The analog detected noise level signal corresponding to the above is output to the microcomputer 450. The noise detection unit 410 includes a microphone (hereinafter referred to as a microphone) 411 as a sound collection unit, a microphone amplifier 412, and the like.
[0025] マイク 411は、マイクアンプ 412に接続されている。このマイク 411は、いわゆるエレ タトレットコンデンサ型のコンデンサマイクロフォンであり、例えば車両の室内空間に おけるインストルメントパネル部に配設されている。なお、マイク 411としては、直流バ ィアスコンデンサ型のコンデンサマイクロフォン、ムービングコィノレ型やリボン型のダイ ナミックマイクロフォン、カーボンマイクロフォン、クリスタルマイクロフォンなどいずれの 構成を適用してもよい。このマイク 411は、図 3に示すような特性を有している。すな わち、図 3において、 3本の線は、マイク 411と同様の構成を有する互いに異なるマイ クにおける音の検出感度(以下、マイク感度と称す)のマイクの周囲温度(以下、マイ ク周囲温度と称す)依存性を示している。このように、マイク 411は、マイク周囲温度が 約 40°C以上になると、マイク感度が徐々に低下する特性を有している。そして、マイ ク 411は、このマイク 411周辺の音を検出して、この検出した音のレベルに対応する アナログの集音状態情報としての検出信号 (以下、アナログ検出信号と称す)をマイ クアンプ 412へ出力する。 The microphone 411 is connected to the microphone amplifier 412. The microphone 411 is a so-called electret condenser condenser microphone, and is disposed, for example, on an instrument panel in a vehicle interior space. Note that the microphone 411 may have any configuration such as a DC bias condenser type condenser microphone, a moving condenser type, a ribbon type dynamic microphone, a carbon microphone, or a crystal microphone. The microphone 411 has characteristics as shown in FIG. That is, in FIG. 3, the three lines indicate the ambient temperature of the microphone (hereinafter referred to as the microphone sensitivity) of the sound detection sensitivity (hereinafter referred to as microphone sensitivity) in different microphones having the same configuration as the microphone 411. (Referred to as ambient temperature). Thus, the microphone 411 has a characteristic that the microphone sensitivity gradually decreases when the ambient temperature of the microphone becomes approximately 40 ° C. or higher. The microphone 411 detects the sound around the microphone 411 and generates a detection signal (hereinafter referred to as an analog detection signal) as analog sound collection state information corresponding to the detected sound level. Output to.
[0026] マイクアンプ 412は、マイコン 450に接続されている。このマイクアンプ 412は、マイ ク 411からアナログ検出信号を取得すると、このアナログ検出信号を増幅してマイコ ン 450へ出力する。 The microphone amplifier 412 is connected to the microcomputer 450. When acquiring the analog detection signal from the microphone 411, the microphone amplifier 412 amplifies the analog detection signal and outputs the amplified analog detection signal to the microphone 450.
[0027] DSP420は、再生咅 300の処理咅 340と、 D/ A変換手段 430と、マイコン 450と、 などに接続されている。この DSP420は、処理部 340からデジタルオーディオ信号 S aを取得して、適宜処理して DZA変換手段 430へ出力する。そして、 DSP420は、 出力音状態情報生成手段としての楽音レベル検出手段 421などを備えている。楽音 レベル検出手段 421は、デジタルオーディオ信号 Saを取得して、このデジタルォー ディォ信号 Saに基づいて、利用者により設定された音量で再生される楽曲の音 (以 下、楽音と称す)のレベルを検出する。さらに、この検出した楽音のレベル (以下、検 出楽音レベルと称す)に対応する出力音状態情報としての検出楽音レベル信号をマ イコン 450へ出力する。 [0028] DZ A変換手段 430は、電子ボリューム 440などに接続されている。この DZA変換 手段 430は、 DSP420からデジタルオーディオ信号 Saを取得する。そして、このデジ タルオーディオ信号 Saをアナログのオーディオ信号(以下、アナログオーディオ信号 と称す)に変換して電子ボリューム 440へ出力する。 The DSP 420 is connected to the processing unit 340 of the playback unit 300, the D / A conversion means 430, the microcomputer 450, and the like. The DSP 420 acquires the digital audio signal Sa from the processing unit 340, processes it appropriately, and outputs it to the DZA conversion means 430. The DSP 420 includes a tone level detection means 421 as output sound state information generation means. Musical sound level detection means 421 acquires the digital audio signal Sa, and based on the digital audio signal Sa, determines the level of the sound of the music (hereinafter referred to as musical sound) to be played at the volume set by the user. To detect. Further, a detected tone level signal as output tone status information corresponding to the detected tone level (hereinafter referred to as a detected tone level) is output to the microcomputer 450. [0028] The DZ A conversion means 430 is connected to an electronic volume 440 or the like. This DZA conversion means 430 acquires the digital audio signal Sa from the DSP 420. The digital audio signal Sa is converted to an analog audio signal (hereinafter referred to as an analog audio signal) and output to the electronic volume 440.
[0029] 電子ボリューム 440は、マイコン 450などに接続されている。この電子ボリューム 44 0は、マイコン 450の制御によりアナログオーディオ信号に基づき発音手段 500から 出力される楽曲の音量を補正する。具体的には、電子ボリューム 440は、 DZA変換 手段 430からアナログオーディオ信号を取得する。また、マイコン 450からアナログォ 一ディォ信号に基づく楽曲の音量を、騒音に応じて補正された音量 (以下、補正音 量と称す)に設定する旨の補正音量信号を取得する。そして、電子ボリューム 440は 、アナログオーディオ信号に基づいて、補正音量信号の補正音量に対応する音量で 楽曲を出力させるための補正アナログオーディオ信号 Sbを生成して、発音手段 500 へ出力する。  The electronic volume 440 is connected to the microcomputer 450 or the like. This electronic volume 440 corrects the volume of the music output from the sound generation means 500 based on the analog audio signal under the control of the microcomputer 450. Specifically, the electronic volume 440 acquires an analog audio signal from the DZA conversion means 430. In addition, the microcomputer 450 obtains a corrected volume signal indicating that the volume of the music based on the analog audio signal is set to a volume corrected in accordance with noise (hereinafter referred to as corrected volume). Then, the electronic volume 440 generates a corrected analog audio signal Sb for outputting music at a volume corresponding to the corrected volume of the corrected volume signal based on the analog audio signal, and outputs it to the sound generation means 500.
[0030] マイコン 450は、騒音と検出楽音レベルに基づいて電子ボリューム 440を制御する 。そして、マイコン 450は、集音状態情報取得手段としての AZD (Analog/Digital)変 換手段 451と、補正状態情報生成手段としても機能するデジタルアツテネータ 452と 、補正状態情報生成手段としても機能する騒音レベル検出手段 453と、停止検出手 段としての停車検出手段 454と、補正状態情報生成制御手段としての利得制御信号 生成手段 455と、音出力状態制御手段としての音量制御信号生成手段 456と、など を備えている。ここで、楽音レベル検出手段 421およびマイコン 450にて、本発明の 音出力制御装置が構成されている。なお、本発明の音出力制御装置としては、楽音 レベル検出手段 421を備えない構成としてもよい。  [0030] The microcomputer 450 controls the electronic volume 440 based on the noise and the detected tone level. The microcomputer 450 functions as an AZD (Analog / Digital) conversion unit 451 as a sound collection state information acquisition unit, a digital attenuator 452 that also functions as a correction state information generation unit, and a correction state information generation unit. Noise level detection means 453, stop detection means 454 as a stop detection means, gain control signal generation means 455 as correction state information generation control means, volume control signal generation means 456 as sound output state control means, Etc. Here, the sound level control means 421 and the microcomputer 450 constitute the sound output control device of the present invention. Note that the sound output control device of the present invention may be configured without the musical sound level detection means 421.
[0031] AZD変換手段 451は、マイクアンプ 412と、デジタルアツテネータ 452と、などに 接続されている。この AZD変換手段 451は、マイクアンプ 412からアナログ検出信 号を取得する。そして、このアナログ検出信号をデジタルの検出信号 (以下、デジタ ル検出信号と称す)に変換してデジタルアツテネータ 452へ出力する。  [0031] The AZD conversion means 451 is connected to a microphone amplifier 412, a digital attenuator 452, and the like. This AZD conversion means 451 acquires an analog detection signal from the microphone amplifier 412. The analog detection signal is converted into a digital detection signal (hereinafter referred to as a digital detection signal) and output to the digital attenuator 452.
[0032] デジタルアツテネータ 452は、騒音レベル検出手段 453と、利得制御信号生成手 段 455と、などに接続されている。このデジタルアツテネータ 452は、利得制御信号 生成手段 455の制御により、デジタル検出信号を適宜増幅する処理をする。具体的 には、デジタルアツテネータ 452は、 AZD変換手段 451からデジタル検出信号を取 得する。さらに、利得制御信号生成手段 455からデジタル検出信号の利得を設定す る旨の利得制御信号を取得する。そして、利得制御信号の利得でデジタル検出信号 を増幅して、騒音レベル検出手段 453へ出力する。また、デジタルアツテネータ 452 は、新たな利得制御信号を取得するまで、最後に取得した利得制御信号の利得で デジタル検出信号を増幅する。 [0032] The digital attenuator 452 is connected to a noise level detection means 453, a gain control signal generation means 455, and the like. This digital attenuator 452 is a gain control signal Under the control of the generating means 455, a process of appropriately amplifying the digital detection signal is performed. Specifically, the digital attenuator 452 obtains a digital detection signal from the AZD conversion means 451. Further, a gain control signal for setting the gain of the digital detection signal is obtained from the gain control signal generating means 455. Then, the digital detection signal is amplified by the gain of the gain control signal and output to the noise level detection means 453. In addition, the digital attenuator 452 amplifies the digital detection signal with the gain of the last gain control signal until a new gain control signal is acquired.
[0033] 騒音レベル検出手段 453は、利得制御信号生成手段 455と、音量制御信号生成 手段 456と、などに接続されている。この騒音レベル検出手段 453は、デジタル検出 信号に対応する音のうち所定の周波数の音のレベルを検出する。具体的には、騒音 レベル検出手段 453は、デジタルアツテネータ 452から利得制御信号生成手段 455 により設定された利得で増幅されたデジタル検出信号を取得する。さらに、このデジ タル検出信号に対応する音のうち周波数が 10Hz近辺の音のレベルを検出する。こ こで、車両のエンジンの音や楽音あるいは搭乗者の話声における 10Hz近辺の音の レベルは低く、車両の走行により生じる風切り音やロードノイズなどの騒音(以下、走 行騒音と称す)における 10Hz近辺の音のレベルは高 、ことが実験的に求められて いる。すなわち、騒音レベル検出手段 453は、走行騒音のレベルを主に検出する。 そして、騒音レベル検出手段 453は、検出した 10Hz近辺の音のレベル (以下、検出 騒音レベルと称す)を認識し、この認識した検出騒音レベルに対応する補正状態情 報としての検出騒音レベル信号を利得制御信号生成手段 455と音量制御信号生成 手段 456とへ出力する。  [0033] The noise level detection means 453 is connected to a gain control signal generation means 455, a volume control signal generation means 456, and the like. The noise level detection means 453 detects the level of a sound having a predetermined frequency among the sounds corresponding to the digital detection signal. Specifically, the noise level detection means 453 obtains a digital detection signal amplified by the gain set by the gain control signal generation means 455 from the digital attenuator 452. In addition, the sound level corresponding to the digital detection signal is detected at a frequency around 10Hz. Here, the sound level around 10 Hz in the sound of the engine and music of the vehicle or the voice of the passenger is low, and it is used for noise such as wind noise and road noise (hereinafter referred to as driving noise) generated by driving the vehicle. It has been experimentally required that the sound level around 10 Hz is high. That is, the noise level detection means 453 mainly detects the level of running noise. The noise level detecting means 453 recognizes the detected sound level around 10 Hz (hereinafter referred to as the detected noise level) and outputs a detected noise level signal as correction state information corresponding to the recognized detected noise level. Output to the gain control signal generation means 455 and the volume control signal generation means 456.
[0034] 停車検出手段 454は、利得制御信号生成手段 455と、パーキングブレーキ部 600 と、などに接続されている。この停車検出手段 454は、パーキングブレーキ部 600か ら停車操作信号 Scを取得すると、車両が停車状態であると認識する。そして、停車を 検出した旨の停車検出信号を利得制御信号生成手段 455へ出力する。  [0034] Stop detection means 454 is connected to gain control signal generation means 455, parking brake section 600, and the like. When the stop detection means 454 acquires the stop operation signal Sc from the parking brake unit 600, the stop detection means 454 recognizes that the vehicle is in a stop state. Then, a stop detection signal indicating that a stop has been detected is output to gain control signal generation means 455.
[0035] 利得制御信号生成手段 455は、利得制御信号を生成してデジタルアツテネータ 45 2へ出力する。具体的には、利得制御信号生成手段 455は、停車検出手段 454から 停車検出信号を取得すると、騒音レベル検出手段 453から検出騒音レベル信号を 取得し、この検出騒音レベル信号に基づいて、検出騒音レベルを認識する。ここで、 このとき認識する検出騒音レベルは、車両が停止して 、るため走行騒音を含まな ヽ 音のレベルとなる。さらに、この検出騒音レベルが例えば予め設定された規定のレべ ル (以下、規定レベルと称す)でないことを認識すると、検出騒音レベルが規定レべ ルの検出騒音レベル信号を騒音レベル検出手段 453に出力させるために、デジタル アツテネータ 452で出力させるデジタル検出信号を増幅する必要があると判断する。 ここで、規定レベルは、マイク周囲温度がマイク感度に影響を与えにくい範囲の温度 、例えば図 3に示すように 25°Cにおいて、車両が停車して走行騒音が生じていない 状態における検出騒音レベルに設定する構成が例示できるが、これに限られず適宜 他のレベルに設定する構成としてもよい。そして、利得制御信号生成手段 455は、例 えば検出騒音レベルおよび規定レベルの差分に基づ 、て、デジタルアツテネータ 45 2に規定レベルの検出騒音レベルに対応するデジタル検出信号を出力させるための 利得を演算して、この利得に関する利得制御信号をデジタルアツテネータ 452へ出 力する。 The gain control signal generation means 455 generates a gain control signal and outputs it to the digital attenuator 45 2. Specifically, when the gain control signal generation unit 455 acquires the stop detection signal from the stop detection unit 454, the gain control signal generation unit 455 outputs the detection noise level signal from the noise level detection unit 453. The detected noise level is recognized based on the detected noise level signal. Here, the detected noise level recognized at this time is a noise level that does not include running noise because the vehicle stops. Further, when it is recognized that the detected noise level is not a predetermined standard level (hereinafter referred to as a predetermined level), for example, the detected noise level signal having the detected noise level of the predetermined level is converted into the noise level detecting means 453. Therefore, it is determined that the digital detection signal output by the digital attenuator 452 needs to be amplified. Here, the specified level is the detected noise level in a state where the ambient temperature of the microphone hardly affects the microphone sensitivity, for example, at 25 ° C as shown in Fig. 3 and the vehicle stops and no running noise is generated. However, the present invention is not limited to this and may be set to other levels as appropriate. Then, the gain control signal generation means 455 is a gain for causing the digital attenuator 452 to output a digital detection signal corresponding to the detection noise level of the specified level, for example, based on the difference between the detection noise level and the specified level. And a gain control signal related to this gain is output to the digital attenuator 452.
音量制御信号生成手段 456は、楽音レベル検出手段 421と、電子ボリューム 440と 、などに接続されている。この音量制御信号生成手段 456は、検出騒音レベルと検 出楽音レベルに基づ 、て、電子ボリューム 440を制御して楽曲の音量を適宜補正す る制御をする。具体的には、音量制御信号生成手段 456は、楽音レベル検出手段 4 21から検出楽音レベル信号を取得して、検出楽音レベルを認識する。また、騒音レ ベル検出手段 453から検出騒音レベル信号を取得して、検出騒音レベルを認識す る。さらに、この検出騒音レベル、すなわち騒音における 10Hz近辺の音のレベル基 づいて、可聴帯域の騒音のレベルを演算する。ここで、上述したように、検出騒音レ ベルが走行騒音のレベルに略対応するため、演算した可聴帯域の騒音のレベルは 、可聴帯域の走行騒音のレベルと略同一となる。そして、検出楽音レベル、および、 走行騒音における可聴帯域の音のレベルに基づいて、走行騒音のいわゆるマスキン グ効果による利用者が聴取可能な楽音のレベル (以下、聴感レベルと称す)の低下 状態を認識する。さらに、聴感レベルを所定のレベル、例えば走行騒音が存在しな い状態におけるレベルと略同一とする状態に補正するための補正音量を演算し、こ の補正音量に関する補正音量信号を電子ボリューム 440へ出力する。 The volume control signal generation means 456 is connected to the musical sound level detection means 421, the electronic volume 440, and the like. The volume control signal generation means 456 controls the electronic volume 440 to appropriately correct the volume of the music based on the detected noise level and the detected musical sound level. Specifically, the volume control signal generation unit 456 acquires the detected tone level signal from the tone level detection unit 421, and recognizes the detected tone level. Further, a detected noise level signal is acquired from the noise level detecting means 453, and the detected noise level is recognized. Furthermore, the noise level in the audible band is calculated based on the detected noise level, that is, the level of sound around 10 Hz in the noise. Here, as described above, since the detected noise level substantially corresponds to the traveling noise level, the calculated noise level in the audible band is substantially the same as the traveling noise level in the audible band. Based on the detected sound level and the sound level of the audible band in the running noise, the level of the tone that can be heard by the user due to the so-called masking effect of the running noise (hereinafter referred to as the audible level) is reduced. recognize. Further, a correction volume for correcting the audibility level to a predetermined level, for example, approximately the same level as when no running noise is present, is calculated, and this is calculated. A corrected volume signal relating to the corrected volume of the sound is output to the electronic volume 440.
[0037] 発音手段 500は、例えばインストルメントパネル部、ドア部、リアダッシュボード部な ど、車両の室内空間における前方部分や後方部分の左右側にそれぞれ配設された 図示しないスピーカを有している。そして、発音手段 500は、楽曲再生装置 200によ り制御され、楽曲再生装置 200から出力される補正アナログオーディオ信号 Sbを取 得して、この補正アナログオーディオ信号 Sbに基づいて、騒音に基づいて補正され た音量で楽曲を出力させる。  [0037] The sound generation means 500 includes speakers (not shown) disposed on the left and right sides of the front portion and the rear portion in the vehicle interior space, such as an instrument panel portion, a door portion, and a rear dashboard portion, for example. Yes. Then, the sound generation means 500 is controlled by the music playback device 200, acquires the corrected analog audio signal Sb output from the music playback device 200, and based on the noise based on the corrected analog audio signal Sb. Output the music at the corrected volume.
[0038] 〔楽曲再生システムの動作〕  [0038] [Operation of music playback system]
次に、楽曲再生システム 100の動作を図面に基づいて説明する。図 4は、停車時に おける検出騒音レベルの調整処理を示すフローチャートである。図 5は、楽曲の音量 補正処理を示すフローチャートである。  Next, the operation of the music playback system 100 will be described with reference to the drawings. FIG. 4 is a flowchart showing a process for adjusting the detected noise level when the vehicle is stopped. FIG. 5 is a flowchart showing the music volume correction processing.
[0039] (停車時における検出騒音レベルの調整処理)  [0039] (Adjustment processing of detected noise level when stopped)
まず、楽曲再生システム 100の動作として、停車時における検出騒音レベルの調整 処理について説明する。  First, as an operation of the music playback system 100, a detection noise level adjustment process when the vehicle is stopped will be described.
[0040] 楽曲再生装置 200の自動音量補正部 400は、マイコン 450の停車検出手段 454に て、図 4に示すように、利用者によりパーキングブレーキ部 600の操作レバーが操作 されて車両が停車したことを検出すると (ステップ S101)、停車検出信号を利得制御 信号生成手段 455へ出力する。そして、利得制御信号生成手段 455は、騒音レベル 検出手段 453からの検出騒音レベル信号に基づいて、騒音検出部 410で検出され た停車時における騒音の検出騒音レベルを認識し、この検出騒音レベルが規定レべ ルか否かを判断する (ステップ S 102)。  [0040] As shown in FIG. 4, the automatic sound volume correction unit 400 of the music playback device 200 causes the stop detection means 454 of the microcomputer 450 to operate the operation lever of the parking brake unit 600 as shown in FIG. When this is detected (step S101), a stop detection signal is output to the gain control signal generation means 455. Based on the detected noise level signal from the noise level detecting means 453, the gain control signal generating means 455 recognizes the detected noise level when the vehicle is stopped detected by the noise detecting section 410, and the detected noise level is It is determined whether or not it is at a specified level (step S102).
[0041] このステップ S102において、規定レベルであると判断した場合、処理を終了する。  If it is determined in step S102 that the level is the specified level, the process ends.
一方、ステップ S102において、規定レベルでないと判断した場合、検出騒音レベル を規定レベルにさせるためのデジタル検出信号の利得を演算する。そして、利得制 御信号生成手段 455は、利得制御信号をデジタルアツテネータ 452へ出力する処理 、すなわち停車時における検出騒音レベルが規定ベルとなる状態にデジタルアツテ ネータ 452を調整する処理を実施して (ステップ S 103)、処理を終了する。  On the other hand, if it is determined in step S102 that the level is not the specified level, the gain of the digital detection signal for setting the detected noise level to the specified level is calculated. Then, the gain control signal generation means 455 performs a process of outputting the gain control signal to the digital attenuator 452, that is, a process of adjusting the digital attenuator 452 so that the detected noise level at the time of stopping becomes a specified bell. (Step S103), the process ends.
[0042] (楽曲の音量補正処理) 次に、楽曲再生システム 100の動作として、楽曲の音量補正処理について説明す る。 [0042] (Music volume correction processing) Next, music volume correction processing as an operation of the music playback system 100 will be described.
[0043] 楽曲再生装置 200の再生部 300は、利用者により選択された楽曲を利用者により 設定された音量で再生させるためのデジタルオーディオ信号 Saを自動音量補正部 4 00へ出力する。自動音量補正部 400は、 DSP420の楽音レベル検出手段 421にて 、再生部 300からデジタルオーディオ信号 Saを取得すると、このデジタルオーディオ 信号 Saに基づいて検出楽音レベル信号を音量制御信号生成手段 456へ出力する。 そして、音量制御信号生成手段 456は、図 5に示すように、検出楽音レベル信号に 基づいて、利用者により音量が設定された楽曲の検出楽音レベルを認識する (ステツ プ S201)。  The playback unit 300 of the music playback device 200 outputs a digital audio signal Sa for playing back the music selected by the user at a volume set by the user to the automatic volume correction unit 400. When the automatic sound volume correction unit 400 acquires the digital audio signal Sa from the playback unit 300 by the musical sound level detection means 421 of the DSP 420, the automatic sound volume correction unit 400 outputs the detected musical sound level signal to the volume control signal generation means 456 based on the digital audio signal Sa. To do. Then, as shown in FIG. 5, the volume control signal generation means 456 recognizes the detected musical tone level of the music whose volume has been set by the user based on the detected musical tone level signal (step S201).
[0044] また、騒音レベル検出手段 453は、デジタルアツテネータ 452にて利得制御信号 生成手段 455により設定された利得で増幅されたデジタル検出信号を取得して、こ のデジタル検出信号に基づいて検出騒音レベル信号を音量制御信号生成手段 456 へ出力する。そして、音量制御信号生成手段 456は、検出騒音レベル信号に基づい て、 10Hz近辺の音の検出騒音レベルを認識する(ステップ S202)。ここで、上述した ように、ステップ S 202において検出する検出騒音レベルは、走行騒音のレベルと略 同一となる。この後、音量制御信号生成手段 456は、検出楽音レベルおよび検出騒 音レベルに基づいて、補正音量を演算して (ステップ S 203)、補正音量信号を電子 ボリューム 440へ出力する。そして、電子ボリューム 440は、補正音量信号を取得す ると、この補正音量信号などに基づく音量補正処理を実施して (ステップ S 204)、処 理を終了する。具体的には、電子ボリューム 440は、補正音量信号およびアナログォ 一ディォ信号に基づいて、楽曲の音量を補正音量に対応する音量に補正して、すな わち聴感レベルを走行騒音が存在しない状態におけるレベルと略同一にする音量 に補正して、楽曲を発音手段 500から出力させる。  In addition, the noise level detection means 453 obtains a digital detection signal amplified by the gain set by the gain control signal generation means 455 by the digital attenuator 452, and detects based on the digital detection signal. The noise level signal is output to the volume control signal generation means 456. Then, the volume control signal generating means 456 recognizes the detected noise level of the sound near 10 Hz based on the detected noise level signal (step S202). Here, as described above, the detected noise level detected in step S202 is substantially the same as the level of traveling noise. Thereafter, the volume control signal generation means 456 calculates a corrected volume based on the detected musical sound level and the detected noise level (step S 203), and outputs the corrected volume signal to the electronic volume 440. Then, when the electronic volume 440 acquires the corrected volume signal, the electronic volume 440 performs a volume correction process based on the corrected volume signal or the like (step S204) and ends the process. Specifically, the electronic volume 440 corrects the volume of the music to a volume corresponding to the corrected volume based on the corrected volume signal and the analog audio signal, that is, the audible level is in the absence of running noise. The sound is output from the sound generation means 500 by correcting the volume to be substantially the same as the level in.
[0045] 〔楽曲再生システムの作用効果〕  [0045] [Effects of music playback system]
上述したように、上記実施の形態では、楽曲再生装置 200の自動音量補正部 400 は、騒音検出部 410にて、マイク 411周辺の音を検出して、この音のレベルに対応す るアナログ検出信号をマイコン 450へ出力する。そして、マイコン 450は、 AZD変換 手段 451にてアナログ検出信号を取得して、このアナログ検出信号をデジタル検出 信号に変換してデジタルアツテネータ 452へ出力する。この後、デジタルアツテネー タ 452は、利得制御信号生成手段 455から取得した利得制御信号の利得でデジタ ル検出信号を増幅して騒音レベル検出手段 453へ出力する。また、騒音レベル検出 手段 453は、デジタル検出信号に基づいて騒音のレベルを認識し、この騒音のレべ ルに関する検出騒音レベル信号を音量制御信号生成手段 456へ出力する。さらに、 音量制御信号生成手段 456は、検出騒音レベル信号の騒音のレベルに基づく補正 音量を演算し、この補正音量に関する補正音量信号を電子ボリューム 440へ出力し て、騒音のレベルに基づき補正された音量で発音手段 500から楽曲を出力させる処 理をする。そして、利得制御信号生成手段 455は、停車検出手段 454で車両が停車 されこと力 S認識されると、デジタルアツテネータ 452に規定レベルの騒音のレベルに 対応するデジタル検出信号を出力させるための利得を演算して、この利得の利得制 御信号をデジタルアツテネータ 452へ出力する。 As described above, in the above embodiment, the automatic volume correction unit 400 of the music playback device 200 detects the sound around the microphone 411 by the noise detection unit 410 and performs analog detection corresponding to the level of this sound. The signal is output to the microcomputer 450. And microcomputer 450, AZD conversion Means 451 acquires an analog detection signal, converts this analog detection signal into a digital detection signal, and outputs it to digital attenuator 452. Thereafter, the digital attenuator 452 amplifies the digital detection signal with the gain of the gain control signal acquired from the gain control signal generation unit 455 and outputs the amplified signal to the noise level detection unit 453. Further, the noise level detection means 453 recognizes the noise level based on the digital detection signal, and outputs a detected noise level signal related to the noise level to the volume control signal generation means 456. Further, the volume control signal generation means 456 calculates a corrected volume based on the noise level of the detected noise level signal, outputs a corrected volume signal related to the corrected volume to the electronic volume 440, and is corrected based on the noise level. Processes to output music from the sound generator 500 at volume. Then, the gain control signal generation means 455 is a gain for causing the digital attenuator 452 to output a digital detection signal corresponding to a predetermined noise level when the stop detection means 454 recognizes that the vehicle has stopped. The gain control signal of this gain is output to the digital attenuator 452.
このため、楽曲再生装置 200は、車両が停車した際の騒音のレベルが規定レベル となる状態にデジタルアツテネータ 452を調整するので、マイク 411のマイク感度がマ イク周囲温度に対応して異なる場合であっても特定のレベルの騒音を同一のレベル の騒音として検出でき、マイク感度にかかわらず発音手段 500で出力させる楽曲の 音量を騒音のレベルに対応させて適切に補正できる。すなわち、例えば図 3に示す ようにマイク周囲温度が 40°C以上となりマイク感度が低下した場合や、一般的な車両 部品の動作保証温度である例えば 85°C近辺となりマイク感度が変化した場合、ある いはマイク感度が保証されて 、な 、温度となりマイク感度が変化した場合であっても 、発音手段 500で出力させる楽曲の音量を騒音のレベルに対応させて適切に補正 できる。また、走行騒音が生じていない状態における騒音のレベルが規定レベルとな る状態にデジタルアツテネータ 452を調整するので、走行騒音すなわち走行中に生 じる騒音のレベルを容易に演算できる。したがって、楽曲再生装置 200は、従来の構 成のようにマイク周囲温度の変化に伴うマイク感度の変化により生じる聴感的な違和 感を利用者に覚えさせることがなぐ発音手段 500から出力させる楽曲の状態を適切 に制御できる。また、楽曲再生装置 200毎にマイク 411のマイク感度がばらつく場合 であっても、各マイク 411のマイク感度を調整する必要がない。したがって、マイク感 度を調整する部材を騒音検出部 410に設ける必要がなぐ楽曲再生装置 200の大 型化を防止できる。さらに、マイク感度を調整する設備や工程を設ける必要がなぐ 楽曲再生装置 200のコストを低減できかつ製造性を向上できる。上記実施の形態の ように、一般的にマイク感度が保証されておらず各マイク 411間で感度ばらつきが大 きいおそれがある 10Hz近辺の音のレベルを認識する構成においては、特に有効で ある。 For this reason, the music playback device 200 adjusts the digital attenuator 452 so that the noise level when the vehicle stops is at the specified level, so that the microphone sensitivity of the microphone 411 differs depending on the ambient temperature of the microphone. Even so, a specific level of noise can be detected as the same level of noise, and the volume of the music output by the sounding means 500 can be appropriately corrected according to the noise level, regardless of the microphone sensitivity. In other words, for example, as shown in Fig. 3, when the microphone ambient temperature is 40 ° C or higher and the microphone sensitivity is reduced, or when the microphone sensitivity changes around 85 ° C, which is the guaranteed operating temperature of general vehicle parts, Alternatively, even if the microphone sensitivity is guaranteed and the microphone sensitivity changes due to temperature, the volume of the music output by the sounding means 500 can be appropriately corrected according to the noise level. In addition, since the digital attenuator 452 is adjusted so that the noise level in a state where no traveling noise is generated becomes a specified level, the traveling noise, that is, the level of noise generated during traveling can be easily calculated. Therefore, the music playback device 200, as in the conventional configuration, is used for the music output from the sound generation means 500 that does not allow the user to perceive a sense of incongruity caused by a change in microphone sensitivity accompanying a change in microphone ambient temperature. The state can be controlled appropriately. Also, if the microphone sensitivity of the microphone 411 varies for each music playback device 200 Even so, there is no need to adjust the microphone sensitivity of each microphone 411. Therefore, it is possible to prevent an increase in the size of the music playback device 200 that does not require the noise detection unit 410 to be provided with a member for adjusting the microphone sensitivity. Furthermore, it is not necessary to provide facilities and processes for adjusting the microphone sensitivity. The cost of the music playback device 200 can be reduced and the productivity can be improved. This is particularly effective in a configuration that recognizes a sound level in the vicinity of 10 Hz, in which microphone sensitivity is generally not guaranteed as in the above-described embodiment, and there is a risk that sensitivity variation may be large between the microphones 411.
[0047] そして、音量制御信号生成手段 456は、騒音のレベルに基づいて楽曲の音量を補 正する。このため、楽曲再生装置 200は、走行騒音が大きい場合であっても、楽曲の 音量を補正することにより、走行騒音のマスキング効果の影響で利用者が楽曲を聴 取できなくなる状況を招くことがない。したがって、楽曲再生装置 200は、楽曲の出力 状態をより適切に制御できる。  [0047] Then, the volume control signal generating means 456 corrects the volume of the music based on the noise level. For this reason, the music playback device 200 may cause a situation in which the user cannot listen to the music due to the masking effect of the running noise by correcting the volume of the music even when the running noise is high. Absent. Therefore, the music reproducing device 200 can more appropriately control the output state of the music.
[0048] また、音量制御信号生成手段 456は、楽音レベル検出手段 421から検出楽音レべ ル信号を取得して、検出楽音レベルすなわち利用者により設定された音量で再生さ れる楽曲の音のレベルを認識する。そして、検出楽音レベルおよび検出騒音レベル に基づ!/、て、聴感レベルを走行騒音が存在して!/、な!/、状態におけるレベルと略同一 の状態に補正するための補正音量を演算して、補正音量信号を出力する。このため 、楽曲再生装置 200は、走行騒音によらず聴感レベルを所定のレベルに保った状態 で楽曲を利用者に聴取させることができる。したがって、楽曲再生装置 200は、楽曲 の出力状態をさらに適切に制御できる。  [0048] Further, the volume control signal generation means 456 acquires the detected musical sound level signal from the musical sound level detection means 421, and detects the detected musical sound level, that is, the sound level of the music reproduced at the volume set by the user. Recognize Based on the detected musical sound level and the detected noise level, it calculates the correction volume for correcting the audibility level to a level that is almost the same as the level in the presence / absence of driving noise! Then, a corrected volume signal is output. For this reason, the music reproducing device 200 can allow the user to listen to the music in a state where the audibility level is maintained at a predetermined level regardless of the running noise. Therefore, the music reproducing device 200 can more appropriately control the output state of the music.
[0049] さらに、騒音レベル検出手段 453は、検出騒音レベルすなわちデジタル検出信号 に対応する音のうち周波数が 10Hz近辺の音のレベルを認識して、この検出騒音レ ベルに基づいて音量制御信号生成手段 456に補正音量を演算させる。このため、楽 曲再生装置 200は、車両のエンジン音や楽音あるいは話声におけるレベルが低ぐ かつ、走行騒音におけるレベルが高 ヽ 10Hz近辺の音に基づ 、て楽曲の音量を補 正するため、エンジン音や楽音あるいは話声に基づいて音量を補正する不適切な処 理を実施することがない。したがって、楽曲再生装置 200は、楽曲の出力状態をさら に適切に制御できる。 [0050] また、停車検出手段 454は、パーキングブレーキ部 600が車両を制動する状態に 操作されたことを検出すると、車両が停車されたことを認識する。このため、楽曲再生 装置 200は、主に停車の際に利用されるパーキングブレーキ部 600の操作状態に基 づ 、て停車を認識するので、例えば減速の際にも利用されるフットブレーキの操作状 態に基づいて停車を認識する構成と比べて、停車を確実に認識できる。また、車両 に従来あるパーキングブレーキ部 600の操作状態に基づいて停車を認識するので、 特別な構成を設けることなく簡単な構成で停車を認識できる。 [0049] Furthermore, the noise level detection means 453 recognizes the detected noise level, that is, the level of the sound having a frequency near 10 Hz among the sounds corresponding to the digital detection signal, and generates a volume control signal based on the detected noise level. Means 456 calculates the correction volume. For this reason, the music playback device 200 corrects the volume of the music based on the sound that is low in the engine sound, music sound, or voice of the vehicle, and that the level in the running noise is high around 10 Hz. Inappropriate processing that corrects the volume based on engine sound, musical sound, or speech is not performed. Therefore, the music reproducing device 200 can further appropriately control the output state of the music. [0050] Further, stop detection means 454 recognizes that the vehicle has stopped when it detects that parking brake unit 600 has been operated to brake the vehicle. For this reason, the music reproducing device 200 recognizes the stop based on the operation state of the parking brake unit 600 that is mainly used when the vehicle is stopped. For example, the operation state of the foot brake that is used also when the vehicle is decelerated. Compared with the configuration for recognizing the stop based on the state, the stop can be reliably recognized. In addition, since the stop is recognized based on the operation state of the parking brake unit 600 which is conventional in the vehicle, the stop can be recognized with a simple configuration without providing a special configuration.
[0051] そして、マイク 411として、エレクトレットコンデンサ型のマイクロフォンを適用してい る。このため、小型や軽量化が容易に図れ、かつ、安価なマイク 411を用いているの で、楽曲再生装置 200の小型化や軽量ィ匕あるいはコストダウンを容易に図ることがで きる。  [0051] As the microphone 411, an electret condenser microphone is applied. For this reason, the size and weight can be easily reduced, and the inexpensive microphone 411 is used. Therefore, the music reproducing device 200 can be easily reduced in size, weight, and cost.
[0052] 〔実施の形態の変形〕  [Modification of Embodiment]
なお、本発明は、上述した一実施の形態に限定されるものではなぐ本発明の目的 を達成できる範囲で以下に示される変形をも含むものである。  The present invention is not limited to the above-described embodiment, but includes the following modifications as long as the object of the present invention can be achieved.
[0053] すなわち、騒音の音質に基づいて楽曲の音質を補正する構成、すなわち例えば楽 曲における走行騒音のマスキング効果で聴感レベルが低下した周波数の音のみの 出力を上げる状態に楽曲の出力状態を補正する構成としてもよい。また、走行騒音 のマスキング効果で聴感レベルが低下した高さの音のみの出力を上げる状態に楽曲 の出力状態を補正する構成としてもよい。これらのような構成にすれば、走行騒音の マスキング効果により利用者が聴取できる楽曲の音質が変化して利用者に違和感を 覚えさせる状況を招くことがない。したがって、楽曲再生装置 200は、楽曲の出力状 態をより適切に制御できる。  [0053] That is, the composition for correcting the sound quality of the music based on the sound quality of the noise, that is, the output state of the music to the state where the output of only the sound having the frequency at which the audibility level has decreased due to the masking effect of the running noise in the music is increased. It is good also as composition which corrects. Alternatively, the output state of the music may be corrected so as to increase the output of only the sound having a height at which the audibility level has decreased due to the masking effect of running noise. With such a configuration, the sound quality of the music that the user can listen to changes due to the masking effect of the running noise, so that the user does not feel uncomfortable. Therefore, the music playback device 200 can more appropriately control the output state of the music.
[0054] また、音量制御信号生成手段 456にて、検出騒音レベルのみに基づいて補正音 量信号を出力する構成としてもよい。このような構成にすれば、 DSP420に楽音レべ ル検出手段 421を設ける必要がなぐ DSP420の構成を簡略にできる。さらに、音量 制御信号生成手段 456に、上記実施の形態の構成と比べて補正音量を容易に演算 させることがでさる。 [0054] Further, the sound volume control signal generating means 456 may be configured to output the corrected sound volume signal based only on the detected noise level. With this configuration, it is possible to simplify the configuration of the DSP 420 without the need to provide the musical tone level detection means 421 in the DSP 420. Furthermore, the volume control signal generation means 456 can easily calculate the corrected volume compared to the configuration of the above embodiment.
[0055] そして、騒音レベル検出手段 453にて、デジタル検出信号に対応する音のうち可 聴帯域の周波数の音のレベルを認識する構成としてもよい。このような構成にすれば[0055] Then, the noise level detecting means 453 allows the sound corresponding to the digital detection signal. It is good also as a structure which recognizes the level of the sound of the frequency of a listening band. With this configuration
、音量制御信号生成手段 456に、 10Hz近辺の周波数の音のレベルに基づいて可 聴帯域の騒音のレベルを演算する機能を設ける必要がなぐ音量制御信号生成手 段 456の構成を簡略にできる。また、一般的に可聴帯域の周波数におけるマイク感 度は保証されているため、楽曲再生装置 200間の性能ばらつきを最小限に抑えるこ とができる。なお、騒音レベル検出手段 453にて、 10Hz以外の非可聴帯域の音のレ ベルを認識する構成としてもょ ヽ。 Thus, the configuration of the volume control signal generation means 456 can be simplified, in which it is not necessary to provide the volume control signal generation means 456 with a function of calculating the noise level in the audible band based on the sound level of a frequency around 10 Hz. Further, since the microphone sensitivity is generally guaranteed at frequencies in the audible band, the performance variation between the music playback devices 200 can be minimized. The noise level detection means 453 may be configured to recognize the level of sound in a non-audible band other than 10 Hz.
[0056] また、停車検出手段 454にて、フットブレーキが車両を制動する状態に操作された ことや、変速ギアを-ユートラルにする状態に操作されたことを認識した際に、停車を 認識する構成としてもよい。さら〖こ、車速パルス信号に基づいて、停車を認識する構 成としてもよい。これらのような構成にすれば、車両に従来存在するフットブレーキや 変速ギアあるいは車速パルス信号に基づ!、て停車を認識するので、特別な構成を設 けることなく簡単な構成で停車を認識できる。  [0056] Further, when the stop detection means 454 recognizes that the foot brake has been operated to brake the vehicle or that the transmission gear has been operated to be in a neutral state, the stop is recognized. It is good also as a structure. Furthermore, it may be configured to recognize the stop based on the vehicle speed pulse signal. With such a configuration, it is possible to recognize a stop based on the foot brake, speed change gear, or vehicle speed pulse signal existing in the vehicle, so it is possible to recognize the stop with a simple configuration without any special configuration. it can.
[0057] さらに、停車検出手段 454にて、移動状態報知処理手段としての図示しないナビゲ ーシヨン装置力 車両の移動状態に関する移動状態情報を取得して、この移動状態 情報に基づいて停車を認識する構成としてもよい。このような構成にすれば、ナビゲ ーシヨン装置で利用される移動状態情報を有効利用できる。  [0057] Further, the stop detection means 454 obtains movement state information related to the movement state of the vehicle (not shown) as the movement state notification processing means, and recognizes the stop based on the movement state information. It is good. With such a configuration, the movement state information used in the navigation device can be used effectively.
[0058] そして、デジタルアツテネータ 452に替えて、 VCA (Voltage Controlled Amplifier) や電子ボリュームなど、マイコン 450で調整可能なデジタルやアナログの信号レベル 調整手段を適用してもよい。また、自動音量補正部 400に入力されるデジタルォー ディォ信号 Saはアナログオーディオ信号でもよぐ楽音レベル検出手段 421をアナ口 グ回路で構成することも可能である。  [0058] In place of the digital attenuator 452, digital or analog signal level adjustment means that can be adjusted by the microcomputer 450, such as a VCA (Voltage Controlled Amplifier) or an electronic volume, may be applied. The digital audio signal Sa input to the automatic sound volume correction unit 400 may be an analog audio signal, and the musical sound level detection means 421 may be configured by an analog circuit.
[0059] また、本発明の音出力制御装置を楽曲再生装置 200に適用した構成について例 示したが、これに限らず映画やテレビ番組などの画像および音声を出力する音声画 像再生装置やテレビジョン受信装置、音声や楽曲を出力するゲーム機器やパーソナ ルコンピュータ、ラジオ放送の音声や楽曲を出力するラジオ受信装置など、音を出力 させる各種機器に適用する構成としてもよい。さらに、車載用に限らず携帯用の上述 した各種機器に適用してもよい。そして、従来ある楽曲再生装置などの上述した各種 機器に、別体で構成された本発明の音出力制御装置を接続する構成としてもよい。 さらに、本発明の音出力制御装置としては、マイコン 450および楽音レベル検出手段 421を独立させた構成としてもよい。 [0059] Further, the configuration in which the sound output control device of the present invention is applied to the music playback device 200 has been shown as an example. However, the present invention is not limited to this. It may be configured to be applied to various devices that output sound, such as a John receiver, a game device or a personal computer that outputs sound or music, or a radio receiver that outputs radio broadcast sound or music. Furthermore, the present invention may be applied to the above-described various devices that are not limited to being mounted on a vehicle. And the above-mentioned various types of music playback devices, etc. It is good also as a structure which connects the sound output control apparatus of this invention comprised separately to the apparatus. Furthermore, the sound output control device of the present invention may have a configuration in which the microcomputer 450 and the musical tone level detecting means 421 are made independent.
[0060] そして、上述した各機能をプログラムとして構築した力 例えば回路基板などのハー ドウエアあるいは 1つの ICなどの素子にて構成するなどしてもよぐいずれの形態とし ても利用できる。なお、プログラムや別途記録媒体から読み取らせる構成とすることに より、上述したように取扱が容易で、利用の拡大が容易に図れる。  [0060] The ability to build each function described above as a program can be used in any form, for example, hardware such as a circuit board or a single IC. In addition, by adopting a configuration that allows reading from a program or a separate recording medium, as described above, handling is easy, and usage can be easily expanded.
[0061] その他、本発明の実施の際の具体的な構造および手順は、本発明の目的を達成 できる範囲で他の構造などに適宜変更できる。  [0061] In addition, the specific structure and procedure for carrying out the present invention can be appropriately changed to other structures and the like as long as the object of the present invention can be achieved.
[0062] 〔実施の形態の効果〕  [Effect of Embodiment]
上述したように、上記実施の形態では、楽曲再生装置 200は、マイコン 450にて、 騒音検出部 410で検出されたマイク 411周辺の音のレベルに対応するアナログ検出 信号を取得する。また、マイコン 450は、デジタルアツテネータ 452にて、アナログ検 出信号に対応するデジタル検出信号を利得制御信号生成手段 455から取得した利 得制御信号の利得で増幅して騒音レベル検出手段 453へ出力する。そして、マイコ ン 450は、音量制御信号生成手段 456にて、電子ボリューム 440の動作を制御して、 デジタル検出信号に基づき騒音レベル検出手段 453で検出された騒音のレベルに 基づく補正音量で、発音手段 500から楽曲を出力させる。さらに、マイコン 450は、利 得制御信号生成手段 455にて、停車検出手段 454で車両が停車されことが認識さ れると、デジタルアツテネータ 452に規定レベルの騒音のレベルに対応するデジタル 検出信号を出力させるための利得に関する利得制御信号を生成して、デジタルアツ テネータ 452へ出力する。このため、楽曲再生装置 200は、車両が停車した際の騒 音のレベルが規定レベルとなる状態にデジタルアツテネータ 452を調整するので、マ イク 411のマイク感度がマイク周囲温度に対応して異なる場合であつても特定のレべ ルの騒音を同一のレベルの騒音として検出でき、マイク感度にかかわらず発音手段 5 00から出力させる楽曲の状態を騒音のレベルに対応させて適切に補正できる。また 、走行騒音が生じて 、な 、状態における騒音のレベルが規定レベルとなる状態にデ ジタルアツテネータ 452を調整するので、走行騒音すなわち走行中に生じる騒音の レベルを容易に演算できる。したがって、楽曲再生装置 200は、従来の構成のように マイク周囲温度の変化に伴うマイク感度の変化により生じる聴感的な違和感を利用 者に覚えさせることがなぐ発音手段 500から出力させる楽曲の状態を適切に制御で きる。 As described above, in the above embodiment, the music reproducing device 200 acquires an analog detection signal corresponding to the sound level around the microphone 411 detected by the noise detection unit 410 by the microcomputer 450. In addition, the microcomputer 450 amplifies the digital detection signal corresponding to the analog detection signal with the gain of the gain control signal obtained from the gain control signal generation means 455 and outputs it to the noise level detection means 453 by the digital attenuator 452. To do. Then, the microcomputer 450 controls the operation of the electronic volume 440 by the volume control signal generation means 456, and generates the sound with the corrected volume based on the noise level detected by the noise level detection means 453 based on the digital detection signal. The music is output from the means 500. Further, when the gain control signal generating means 455 recognizes that the vehicle is stopped by the stop detection means 454, the microcomputer 450 sends a digital detection signal corresponding to the specified noise level to the digital attenuator 452. A gain control signal related to the gain to be output is generated and output to the digital attenuator 452. For this reason, the music playback device 200 adjusts the digital attenuator 452 so that the level of noise when the vehicle stops is at the specified level, so the microphone sensitivity of the microphone 411 differs according to the ambient temperature of the microphone. Even in this case, a specific level of noise can be detected as the same level of noise, and the state of the music output from the sounding means 500 can be appropriately corrected according to the noise level regardless of the microphone sensitivity. In addition, since the digital attenuator 452 is adjusted to a state where the noise level in the state becomes the specified level when the driving noise is generated, the driving noise, that is, the noise generated during the driving is reduced. The level can be calculated easily. Therefore, the music playback device 200, as in the conventional configuration, shows the state of the music to be output from the sound generation means 500 that does not allow the user to perceive a sense of incongruity caused by a change in microphone sensitivity due to a change in microphone ambient temperature. It can be controlled appropriately.
産業上の利用可能性 Industrial applicability
本発明は、音出力手段から出力させる音の状態を制御する音出力制御装置、その 方法、そのプログラム、および、そのプログラムを記録した記録媒体に利用できる。  INDUSTRIAL APPLICABILITY The present invention can be used for a sound output control device that controls the state of sound output from sound output means, a method thereof, a program thereof, and a recording medium on which the program is recorded.

Claims

請求の範囲 The scope of the claims
[1] 外部の音を集音する集音手段から外部の音の状態に関する集音状態情報を取得 する集音状態情報取得手段と、  [1] Sound collection state information acquisition means for acquiring sound collection state information relating to the state of external sound from the sound collection means for collecting external sound;
前記集音状態情報の外部の音の状態を補正した補正状態情報を生成する補正状 態情報生成手段と、  Correction state information generating means for generating correction state information obtained by correcting the sound state outside the sound collection state information;
移動体が停止している状態を検出する停止検出手段と、  Stop detection means for detecting a state in which the moving body is stopped;
前記移動体の停止が検出された際に前記集音状態情報取得手段で取得された前 記集音状態情報の外部の音の状態を基準にして前記補正状態情報を生成させる補 正状態情報生成制御手段と、  Correction state information generation for generating the correction state information on the basis of the external sound state of the sound collection state information acquired by the sound collection state information acquisition means when the stop of the moving body is detected Control means;
前記補正状態情報に基づいて、音出力手段で出力させる音の状態を制御する音 出力状態制御手段と、  Sound output state control means for controlling the state of the sound output by the sound output means based on the correction state information;
を具備したことを特徴とする音出力制御装置。  A sound output control device comprising:
[2] 請求項 1に記載の音出力制御装置であって、  [2] The sound output control device according to claim 1,
前記音出力状態制御手段は、前記音出力手段で出力させる音の大きさを制御する 処理を前記音の状態を制御する処理として実施する  The sound output state control means implements a process for controlling the volume of sound output by the sound output means as a process for controlling the sound state.
ことを特徴とする音出力制御装置。  The sound output control apparatus characterized by the above-mentioned.
[3] 請求項 1または請求項 2に記載の音出力制御装置であって、 [3] The sound output control device according to claim 1 or claim 2,
前記音出力状態制御手段は、前記音出力手段で出力させる音の音質を制御する 処理を前記音の状態を制御する処理として実施する  The sound output state control means implements a process for controlling the sound quality of the sound output by the sound output means as a process for controlling the sound state.
ことを特徴とする音出力制御装置。  The sound output control apparatus characterized by the above-mentioned.
[4] 請求項 1ないし請求項 3のいずれかに記載の音出力制御装置であって、 [4] The sound output control device according to any one of claims 1 to 3,
所定の音を前記音出力手段で出力させるための出力音情報を取得して、前記音出 力手段で出力させる音の状態に関する出力音状態情報を生成する出力音状態情報 生成手段を具備し、  Output sound state information generating means for acquiring output sound information for outputting a predetermined sound by the sound output means and generating output sound state information relating to a sound state to be output by the sound output means;
前記音出力状態制御手段は、前記補正状態情報および前記出力音状態情報に 基づいて、前記外部の音が重ね合わされた状態で聴取される前記音出力手段で出 力される音を所定の状態で聴取させる状態に前記音出力手段から出力させる音の 状態を制御する ことを特徴とする音出力制御装置。 The sound output state control means is configured to output, in a predetermined state, a sound output by the sound output means that is heard in a state where the external sound is superimposed based on the correction state information and the output sound state information. Control the state of the sound output from the sound output means to the state of listening The sound output control apparatus characterized by the above-mentioned.
[5] 請求項 1ないし請求項 4のいずれかに記載の音出力制御装置であって、  [5] The sound output control device according to any one of claims 1 to 4,
前記補正状態情報生成手段は、前記集音状態情報の前記外部の音における周波 数が 10Hz以下の音の状態に関する前記補正状態情報を生成する  The correction state information generation unit generates the correction state information related to a sound state in which the frequency of the external sound of the sound collection state information is 10 Hz or less.
ことを特徴とする音出力制御装置。  A sound output control device characterized by that.
[6] 請求項 1ないし請求項 5のいずれかに記載の音出力制御装置であって、 [6] The sound output control device according to any one of claims 1 to 5,
前記停止検出手段は、前記移動体の移動状態を報知させる移動状態報知処理手 段から前記移動状態に関する移動状態情報を取得して、前記移動体が停止してい る状態を検出する  The stop detection means acquires movement state information relating to the movement state from a movement state notification processing means for notifying the movement state of the mobile body, and detects a state in which the mobile body is stopped.
ことを特徴とする音出力制御装置。  The sound output control apparatus characterized by the above-mentioned.
[7] 音出力手段で出力させる音の状態を制御する音出力制御方法であって、 [7] A sound output control method for controlling the state of the sound output by the sound output means,
外部の音を集音する集音手段から外部の音の状態に関する集音状態情報を取得 し、  Collect sound collection status information about the state of the external sound from the sound collection means that collects the external sound,
前記集音状態情報の外部の音の状態を補正した補正状態情報を生成し、 移動体が停止している状態を検出し、  Generating corrected state information in which the sound state outside the sound collection state information is corrected, detecting a state in which the moving body is stopped,
前記移動体の停止が検出された際に前記取得された前記集音状態情報の外部の 音の状態を基準にして前記補正状態情報を生成させ、  When the stop of the moving body is detected, the correction state information is generated based on a sound state outside the acquired sound collection state information;
前記補正状態情報に基づいて、音出力手段で出力させる音の状態を制御する ことを特徴とする音出力制御方法。  A sound output control method, comprising: controlling a state of a sound output by the sound output unit based on the correction state information.
[8] 演算手段を請求項 1ないし請求項 6のいずれかに記載の音出力制御装置として機 能させる [8] Let the computing means function as the sound output control device according to any one of claims 1 to 6.
ことを特徴とする音出力制御プログラム。  A sound output control program.
[9] 請求項 7に記載の音出力制御方法を演算手段に実行させる [9] Let the computing means execute the sound output control method according to claim 7
ことを特徴とする音出力制御プログラム。  A sound output control program.
[10] 請求項 8または請求項 9に記載の音出力制御プログラムが演算手段にて読取可能 に記録された [10] The sound output control program according to claim 8 or claim 9 is recorded so as to be readable by the arithmetic means.
ことを特徴とする音出力制御プログラムを記録した記録媒体。  The recording medium which recorded the sound output control program characterized by the above-mentioned.
PCT/JP2006/305917 2005-03-31 2006-03-24 Audio output control device, method thereof, program thereof, and recording medium containing the program WO2006109505A1 (en)

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