WO2006109505A1 - Dispositif de commande de sortie audio, son procede et programme, et support d’enregistrement contenant le programme - Google Patents

Dispositif de commande de sortie audio, son procede et programme, et support d’enregistrement contenant le programme 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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WIPO (PCT)
Prior art keywords
sound
state
sound output
state information
output
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PCT/JP2006/305917
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English (en)
Japanese (ja)
Inventor
Hisashi Kihara
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Pioneer Corporation
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Publication date
Application filed by Pioneer Corporation filed Critical Pioneer Corporation
Priority to JP2007512478A priority Critical patent/JP4550888B2/ja
Publication of WO2006109505A1 publication Critical patent/WO2006109505A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating 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.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

La présente invention concerne une unité de correction automatique de volume sonore (400) d’un dispositif de reproduction de composition de musique qui utilise un atténuateur numérique (452) pour amplifier un signal de détection numérique correspondant au niveau du son détecté par une unité de détection de bruit (410) par un gain du signal de commande de gain acquis à partir d’un moyen de génération de signal de commande de gain (455) et l’envoyer à un moyen de détection de niveau de bruit (453). Un moyen de génération de signal de commande de volume sonore (456) commande un volume électronique (440) afin de produire une composition de musique à partir d’un moyen de génération de son avec un volume sonore corrigé correspondant au niveau de bruit sur la base du signal de détection numérique. Lorsque le moyen de génération de signal de commande de gain (455) reconnaît que le véhicule s’est arrêté, il génère et émet un signal de commande de gain concernant un gain pour que l’atténuateur numérique (452) émette un signal de détection numérique correspondant à un niveau de bruit d’un niveau prédéterminé.
PCT/JP2006/305917 2005-03-31 2006-03-24 Dispositif de commande de sortie audio, son procede et programme, et support d’enregistrement contenant le programme WO2006109505A1 (fr)

Priority Applications (1)

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JP2007512478A JP4550888B2 (ja) 2005-03-31 2006-03-24 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

Applications Claiming Priority (2)

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JP2005101612 2005-03-31
JP2005-101612 2005-03-31

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WO2006109505A1 true WO2006109505A1 (fr) 2006-10-19

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Publication number Priority date Publication date Assignee Title
JP2009280115A (ja) * 2008-05-23 2009-12-03 Kenwood Corp オーディオシステム、オーディオ装置、音声再生方法及びプログラム
CN102419967A (zh) * 2008-04-07 2012-04-18 索尼株式会社 乐曲再现装置
CN113098644A (zh) * 2021-03-25 2021-07-09 重庆振多弱电工程有限公司 一种能够根据噪音大小自动调节音量的公共广播装置

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JPS60261297A (ja) * 1984-06-08 1985-12-24 Yamaha Motor Co Ltd 車載用音響装置の自動音量制御装置
JPH06319192A (ja) * 1993-05-10 1994-11-15 Mitsubishi Motors Corp オーディオ信号処理方法および装置
JPH0730347A (ja) * 1993-07-08 1995-01-31 Clarion Co Ltd 車室内騒音低減装置
JP2004228937A (ja) * 2003-01-23 2004-08-12 Pioneer Electronic Corp 音響補正システムおよび音響補正プログラムおよび音響補正方法および音響補正装置

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JPH07245798A (ja) * 1994-03-07 1995-09-19 Takaoka Electric Mfg Co Ltd カーオーディオ装置
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JPH0937122A (ja) * 1995-07-21 1997-02-07 Matsushita Electric Ind Co Ltd カメラ一体型ビデオテープレコーダー
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Publication number Priority date Publication date Assignee Title
JPS60261297A (ja) * 1984-06-08 1985-12-24 Yamaha Motor Co Ltd 車載用音響装置の自動音量制御装置
JPH06319192A (ja) * 1993-05-10 1994-11-15 Mitsubishi Motors Corp オーディオ信号処理方法および装置
JPH0730347A (ja) * 1993-07-08 1995-01-31 Clarion Co Ltd 車室内騒音低減装置
JP2004228937A (ja) * 2003-01-23 2004-08-12 Pioneer Electronic Corp 音響補正システムおよび音響補正プログラムおよび音響補正方法および音響補正装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102419967A (zh) * 2008-04-07 2012-04-18 索尼株式会社 乐曲再现装置
JP2009280115A (ja) * 2008-05-23 2009-12-03 Kenwood Corp オーディオシステム、オーディオ装置、音声再生方法及びプログラム
CN113098644A (zh) * 2021-03-25 2021-07-09 重庆振多弱电工程有限公司 一种能够根据噪音大小自动调节音量的公共广播装置
CN113098644B (zh) * 2021-03-25 2022-02-11 重庆振多弱电工程有限公司 一种能够根据噪音大小自动调节音量的公共广播装置

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JP4550888B2 (ja) 2010-09-22

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