WO2022163308A1 - 情報処理装置、情報処理方法、およびプログラム - Google Patents
情報処理装置、情報処理方法、およびプログラム Download PDFInfo
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- WO2022163308A1 WO2022163308A1 PCT/JP2022/000011 JP2022000011W WO2022163308A1 WO 2022163308 A1 WO2022163308 A1 WO 2022163308A1 JP 2022000011 W JP2022000011 W JP 2022000011W WO 2022163308 A1 WO2022163308 A1 WO 2022163308A1
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- 230000010365 information processing Effects 0.000 title claims abstract description 69
- 238000003672 processing method Methods 0.000 title claims abstract description 6
- 238000005259 measurement Methods 0.000 claims abstract description 102
- 238000012546 transfer Methods 0.000 claims abstract description 65
- 238000000034 method Methods 0.000 claims description 23
- 238000005516 engineering process Methods 0.000 abstract description 13
- 238000012545 processing Methods 0.000 description 65
- 238000012937 correction Methods 0.000 description 36
- 230000005236 sound signal Effects 0.000 description 35
- 238000010586 diagram Methods 0.000 description 26
- 238000004519 manufacturing process Methods 0.000 description 19
- 230000006870 function Effects 0.000 description 7
- 210000005069 ears Anatomy 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 210000003027 ear inner Anatomy 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 210000003454 tympanic membrane Anatomy 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
- H04S7/30—Control circuits for electronic adaptation of the sound field
- H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
- H04S2420/01—Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
- H04S7/30—Control circuits for electronic adaptation of the sound field
- H04S7/305—Electronic adaptation of stereophonic audio signals to reverberation of the listening space
Definitions
- the present technology relates to an information processing device, an information processing method, and a program, and more particularly to an information processing device, an information processing method, and a program that allow a user to adjust a personalized transfer function.
- a personalized Head Related Transfer Function is obtained, for example, by convolving the inverse characteristics of the HRTF from the headphones to the ears with the HRTF from the speakers to the ears.
- a personalized HRTF is unique to the user and is usually used as a fixed value in calculations. Therefore, the user cannot adjust the sound field and sound quality by adjusting the personalized HRTF itself.
- This technology has been developed in view of this situation, and allows the user to adjust the personalized transfer function.
- An information processing apparatus includes an adjustment unit that adjusts a personalized transfer characteristic, which is a transfer characteristic of sound in a measurement environment and is personalized by a user, according to an operation by the user. Prepare.
- a personalized transfer characteristic which is the transfer characteristic of sound in the measurement environment and is the transfer characteristic personalized to the user, is adjusted according to the user's operation.
- FIG. 1 is a diagram illustrating a configuration example of a sound production system according to an embodiment of the present technology
- FIG. FIG. 4 is a diagram showing the flow of measurement in the measurement environment
- FIG. 4 is a diagram showing the flow of adjustment in the measurement environment
- FIG. 5 is a diagram showing an example of adjustment in the measurement environment
- FIG. 4 is a diagram showing a flow of reproduction in a reproduction environment
- It is a block diagram which shows the functional structural example of an information processing apparatus.
- 3 is a block diagram showing a configuration example of a file generation unit
- FIG. 5 is a diagram showing an example of reference information for sound field adjustment
- 3 is a block diagram showing a configuration example of an adjustment value recording unit
- FIG. 4 is a diagram showing an example of information recorded in a personalized HRTF file
- FIG. 10 is a flow chart describing a personalized HRTF file generation process performed by an information processing device in a measurement environment
- FIG. 10 is a flowchart for explaining personalized HRTF adjustment processing performed by an information processing device in a measurement environment
- FIG. 10 is a flowchart for explaining file information display processing; It is a figure which shows the example of a display of attribute information.
- 4 is a flowchart for explaining sound quality adjustment processing; It is a figure which shows the example of a display of a sound quality adjustment screen. It is a figure which shows the content of each information of a sound quality adjustment screen.
- FIG. 6 is a flowchart for explaining sound field adjustment processing; It is a figure which shows the example of a display of a sound field adjustment screen. It is a figure which shows the content of each information of a sound field adjustment screen.
- 3 is a block diagram showing a functional configuration example of a playback device;
- FIG. 10 is a flowchart for explaining playback processing performed by a playback device in a playback environment;
- FIG. It is a block diagram which shows the structural example of the hardware of a computer.
- FIG. 1 is a diagram showing a configuration example of a sound production system according to an embodiment of the present technology.
- the sound production system in Figure 1 consists of equipment on the measurement environment side and equipment on the playback environment side.
- the sound production system of FIG. 1 is, for example, a system used for producing sound for movies.
- the sound of the movie includes not only the voice of the characters such as the dialogue and narration of the performers, but also various sounds such as sound effects, environmental sounds, and BGM.
- various sounds such as sound effects, environmental sounds, and BGM.
- the sound will be collectively described as sound, but in reality, the sound of a movie includes sounds other than sound.
- the measurement environment is called a dubbing stage, and is a movie theater used for sound production.
- a movie theater is provided with a plurality of speakers along with a screen.
- the movie theater is provided with an information processing device 1 that acquires the measurement result of HRTF (Head-Related Transfer Function) representing the transfer characteristics of sound in the measurement environment and generates information such as an HRTF file.
- HRTF Head-Related Transfer Function
- the information processing device 1 is configured by, for example, a PC.
- a personalized HRTF which is an HRTF personalized to the audio producer of the movie
- the personalized HRTF is adjusted so that the same sound quality as that of the measurement environment can be reproduced, and the same sound field as that of the measurement environment can be reproduced. Adjustment of the personalized HRTF is performed, for example, by the producer who edits in the playback environment while listening to the reproduced sound using the personalized HRTF.
- a personalized HRTF file is generated by the information processing device 1 by recording the adjusted values of the personalized HRTF together with the personalized HRTF data.
- the personalized HRTF data representing the measurement result of the personalized HRTF and the personalized HRTF file in which adjustment values are recorded are provided to the playback device 31 provided in the playback environment.
- the personalized HRTF file may be provided to the playback device 31 via a network such as the Internet, or may be provided using a recording medium such as a flash memory.
- the playback environment is an environment in a location different from the movie theater, such as a studio or the producer's home.
- the playback environment may be prepared at the same location as the measurement environment.
- the playback environment is provided with a playback device 31, which is a device used for editing movie audio.
- the playback device 31 is also configured by, for example, a PC.
- the producer edits the sound of the movie using the headphones 32 in a playback environment such as at home.
- a headphone 32 is an output device prepared for the reproduction environment.
- the audio signal is played back using the personalized HRTF.
- Playback using the personalized HRTF reproduces the sound output from the movie theater speakers used for the measurement of the personalized HRTF.
- the playback device 31 adjusts the personalized HRTF used for reproducing the audio signal based on the adjustment value. Since the audio signal is reproduced using the adjusted personalized HRTF, the sound quality of the sound heard from the headphone 32 is the same as the sound quality in the measurement environment. Also, the sound field of the sound heard from the headphone 32 is the same as the sound field in the measurement environment.
- Speech reproduced using a personalized HRTF generally reproduces the sound in the measurement environment more faithfully than sound reproduced using a non-personalized HRTF (the HRTF commonly used by many people).
- a non-personalized HRTF the HRTF commonly used by many people.
- the personalized HRTF By adjusting the personalized HRTF itself, the sound of the measurement environment with adjusted sound quality and sound field is reproduced.
- the producer can edit while listening to the sound adjusted based on how he or she feels.
- FIG. 2 is a diagram showing the flow of measurement in the measurement environment.
- Measurements in the measurement environment mainly include HRTF measurements and recording of reference information.
- the HRTF measurement is performed, for example, with the listener sitting on a predetermined seat in a movie theater with a microphone 21 attached to the ear hole.
- the creator of the movie's sound becomes the listener.
- the HRTF personalized to the producer is measured. Since the HRTF differs depending on the shape of the ear, etc., the sound image can be localized with high accuracy by using the personalized HRTF.
- the reproduced sound is output from the speaker 23 of the movie theater, and the personalized HRTF from the speaker 23 to the ear (for example, ear hole position, eardrum position) is measured.
- a headphone 22 is an output device prepared in the measurement environment.
- the reproduced sound is output from the headphone 22, and the personalized HRTF from the headphone 22 to the ear is measured.
- the reproduced sound from the headphone 22 for example, the same sound as the reproduced sound output from the speaker 23 is used.
- the information processing device 1 acquires the personalized HRTF from the speaker 23 to the ear and the personalized HRTF from the headphone 22 to the ear measured in this way.
- the information processing device 1 generates personalized HRTF data including the personalized HRTF from the speaker 23 to the ear and inverse correction data.
- the inverse correction data is data representing the inverse characteristics of the personalized HRTF from the headphones 22 to the ears.
- the inverse correction data is used to correct the personalized HRTF during playback in the playback environment. This correction is performed by superimposing inverse correction data on the personalized HRTF from the speaker 23 to the ear, that is, by canceling the personalized HRTF from the headphone 22 to the ear.
- reference information which is information referred to by the creator when adjusting the personalized HRTF, is acquired.
- the reference information is acquired based on, for example, characteristics of the measurement environment, device characteristics of the headphones 22, and the like. Details of the reference information will be described later.
- a personalized HRTF file is generated as indicated by arrow #1.
- FIG. 3 is a diagram showing the flow of adjustment in the measurement environment.
- a headphone 22 is connected to the information processing device 1 as shown on the right side of FIG. Audio reproduced using the personalized HRTF data read from the personalized HRTF file is output from the headphones 22 .
- the producer operates the information processing apparatus 1 while viewing the display on the display 1A. For example, as shown in FIG. Adjust so that the sound field and sound quality of the reproduced sound are reproduced.
- Information based on, for example, personalized HRTF data and reference information is displayed on the adjustment screen displayed on the display 1A.
- the producer refers to the reference information used for adjusting the sound field, and adjusts the reverberation components included in the reproduced sound output from the headphones 22 .
- an adjustment value used for adjusting the personalized HRTF from the speaker 23 to the ear is generated according to the operation of the producer.
- the producer refers to the reference information used for adjusting the sound quality, and adjusts the sound quality taking into consideration the characteristics of the headphones 22 .
- an adjustment value used for adjusting the inverse correction data of the personalized HRTF from the headphone 22 to the ear is generated according to the operation of the producer.
- the adjusted values of the personalized HRTF data generated in this way are recorded in the personalized HRTF file together with the personalized HRTF data and reference information, as indicated by arrow #2 in FIG.
- FIG. 5 is a diagram showing the flow of playback in the playback environment.
- a headphone 32 is connected to the playback device 31 prepared in the playback environment.
- the headphones 32 are, for example, headphones of the same model number (headphones with the same specifications) manufactured by the same manufacturer as the headphones 22 used in the measurement environment.
- the headphones 22 brought home by the creator may be used as the headphones 32 .
- the personalized HRTF data recorded in the personalized HRTF file is adjusted based on the adjustment value.
- the adjusted personalized HRTF data is used to reproduce the audio signal of the edited movie, such as object audio and channel audio.
- Audio data constituting movie audio includes data of object audio and channel audio.
- the producer can edit the sound of the movie while listening to the playback sound output so as to reproduce the movie theater as the production environment of the sound of the movie.
- the producer can edit the sound with the sound field adjusted so that the sound is not blurred.
- the producer can improve the reproducibility of the sound quality of the low-frequency sound output from the subwoofer installed in the measurement environment. be able to.
- FIG. 6 is a block diagram showing a functional configuration example of the information processing device 1. As shown in FIG.
- the information processing unit 101 is realized by executing a predetermined program by the CPU of the PC that constitutes the information processing device 1.
- the information processing section 101 is composed of a file generation section 111 and an adjustment value recording section 112 . At least part of the configuration of the information processing section 101 may be implemented by other equipment such as an amplifier provided in the measurement environment.
- the file generation unit 111 measures the personalized HRTF and generates a personalized HRTF file.
- the personalized HRTF file generated by the file generating section 111 is supplied to the adjustment value recording section 112 .
- the adjustment value recording unit 112 adjusts the personalized HRTF data according to the producer's operation, and records the adjustment values in the personalized HRTF file.
- FIG. 7 is a block diagram showing a configuration example of the file generation unit 111. As shown in FIG. 7
- the file generation unit 111 is composed of a reproduction processing unit 121, an output control unit 122, an HRTF acquisition unit 123, an HRTF data generation unit 124, a reference information acquisition unit 125, and an HRTF file generation unit 126.
- the reproduction processing unit 121 controls reproduction of sounds output from the headphones 22 and the speaker 23 .
- An audio signal obtained by reproducing audio data such as data of a prescribed signal is supplied to the output control section 122 .
- the output control unit 122 causes the headphone 22 and the speaker 23 to output a reproduced sound corresponding to the audio signal supplied from the reproduction processing unit 121 .
- the HRTF acquisition unit 123 acquires the personalized HRTF from the headphone 22 to the ear and the personalized HRTF from the speaker 23 to the ear based on the sound collected by the microphone 21 .
- Information representing the personalized HRTF acquired by the HRTF acquisition unit 123 is supplied to the HRTF data generation unit 124 .
- the HRTF data generation unit 124 generates personalized HRTF data including inverse correction data and personalized HRTF from the speaker 23 to the ear.
- the personalized HRTF data generated by the HRTF data generator 124 is supplied to the HRTF file generator 126 .
- the reference information acquisition unit 125 acquires reference information based on the characteristics of the measurement environment and the device characteristics of the headphones 22 .
- the reference information acquisition unit 125 acquires reference information for sound quality adjustment based on the characteristics of the headphones 22 .
- Reference information for sound quality adjustment is acquired based on device characteristics such as individual variation, linearity, and THD (Total Harmonic Distortion).
- reference information for sound quality adjustment is acquired based on the sound pressure distribution level (SPL (Sound Pressure Level)) and THD when using signals of each voltage.
- SPL Sound Pressure Level
- the reference information acquisition unit 125 acquires reference information for sound field adjustment based on the reverberation characteristics of the measurement environment. For example, reference information for sound field adjustment is acquired based on the personalized HRTF from the speaker 23 to the ear.
- FIG. 8 is a diagram showing an example of reference information for sound field adjustment.
- a in Fig. 8 represents the attenuation characteristics of the reverberation components in the three spaces “Room A”, “Room B”, and “Room C”.
- B in FIG. 8 represents information for converting reverberation components in the space of "Room A” into reverberation components in the spaces of "Room B” and "Room C”.
- "Room A” represents a large room and corresponds to, for example, a movie theater, which is the measurement environment.
- “Room B” represents a medium-sized room and "Room C” represents a small room.
- the reference information acquisition unit 125 acquires information for converting the reverberation components in the measurement environment into reverberation components in the prescribed space as reference information together with the information on the reverberation components in the measurement environment.
- Information representing the characteristics of the measurement environment and the device characteristics of the headphones 22 as described above is input to the reference information acquisition unit 125 in FIG. 7, for example, before the personalized HRTF is measured.
- the reference information acquired by the reference information acquisition section 125 is supplied to the HRTF file generation section 126 .
- the HRTF file generation unit 126 generates a personalized HRTF file by adding a header including the reference information supplied from the reference information acquisition unit 125 to the personalized HRTF data supplied from the HRTF data generation unit 124. do.
- the header portion includes reference information as well as information representing the measurement location, user name, and model name of the headphones 22 as attribute information.
- FIG. 9 is a block diagram showing a configuration example of the adjustment value recording unit 112 .
- the adjustment value recording unit 112 is composed of a personalized HRTF file acquisition unit 141 , a reproduction processing unit 142 , an output control unit 143 , an adjustment unit 144 and a recording unit 145 .
- the personalized HRTF file acquisition unit 141 acquires the personalized HRTF file supplied from the file generation unit 111.
- the personalized HRTF file acquired by the personalized HRTF file acquisition section 141 is supplied to the playback processing section 142 , adjustment section 144 and recording section 145 .
- the playback processing unit 142 acquires the audio signal used in adjusting the personalized HRTF. For example, the same audio signal as the prescribed signal used in measuring the personalized HRTF is acquired.
- the reproduction processing unit 142 reads out the personalized HRTF data from the personalized HRTF file supplied from the personalized HRTF file acquisition unit 141, and performs binaural processing including convolution of the personalized HRTF on the audio signal to generate a reproduced signal. Generate.
- the reproduction processing unit 142 appropriately adjusts the personalized HRTF based on the adjustment value supplied from the adjusting unit 144, and performs binaural processing using the adjusted personalized HRTF.
- a reproduced signal generated by the reproduction processing unit 142 is supplied to the output control unit 143 .
- the output control unit 143 causes the headphones 22 to output a reproduced sound according to the signal supplied from the reproduction processing unit 142 .
- the adjustment unit 144 is composed of a file information display unit 171, a sound quality adjustment unit 172, and a sound field adjustment unit 173.
- the file information display unit 171 displays the content of the attribute information included in the header of the personalized HRTF file supplied from the personalized HRTF file acquisition unit 141 on the adjustment screen.
- the display 1A displays an adjustment screen that serves as a GUI (Graphical User Interface) used for adjusting the personalized HRTF data.
- GUI Graphic User Interface
- the sound quality adjustment unit 172 displays information representing reverse correction data on the adjustment screen when adjusting the sound quality.
- the inverse correction data is included in the personalized HRTF data of the personalized HRTF file supplied from the personalized HRTF file acquisition unit 141 . Also, the sound quality adjustment unit 172 displays the content of the reference information included in the header of the personalized HRTF file on the adjustment screen.
- the sound quality adjustment unit 172 acquires the adjustment value of the inverse correction data as the sound quality adjustment value according to the operation of the producer.
- the sound field adjustment unit 173 displays information representing the reverberation component based on the personalized HRTF from the speaker 23 to the ear on the adjustment screen.
- the personalized HRTF from the speaker 23 to the ear is included in the personalized HRTF data of the personalized HRTF file supplied from the personalized HRTF file acquisition unit 141 .
- the sound field adjustment unit 173 displays the content of the reference information included in the header of the personalized HRTF file on the adjustment screen.
- the sound field adjustment unit 173 acquires the adjustment value of the personalized HRTF from the speaker 23 to the ear as the sound field adjustment value according to the operation of the producer.
- the adjustment unit 144 functions as a presentation unit that displays the content of attribute information, the content of reference information, personalized HRTF data, etc. on the adjustment screen and presents them to the creator (user).
- the sound quality adjustment value and the sound field adjustment value acquired by the adjustment unit 144 are supplied to the reproduction processing unit 142 and the recording unit 145 .
- the recording unit 145 records the adjustment value supplied from the adjustment unit 144 in the header portion of the personalized HRTF file supplied from the personalized HRTF file acquisition unit 141 .
- FIG. 10 is a diagram showing an example of information recorded in a personalized HRTF file.
- Personalized HRTF data is recorded in the personalized HRTF file, and header information is recorded in the header section.
- the header information includes attribute information, reference information, and adjustment values.
- the attribute information includes information representing the measurement location, information representing the user name, and information representing the model name of the headphones used for the measurement.
- the information representing the measurement location is information representing the location of the measurement environment.
- the information on the movie theater used as the measurement environment is recorded as the information representing the measurement location.
- an author who tailors a personalized HRTF can specify the measurement environment based on the information representing the measurement location.
- the information that represents the user name is the information that represents the author who edits using the personalized HRTF.
- the information representing the model name of the headphones used for the measurement includes identification information such as information representing the manufacturer of the headphones 22 and the model name.
- the reference information includes reference information for sound quality adjustment and reference information for sound field adjustment.
- the reference information for sound quality adjustment includes, for example, Split Freq and Limit Gain.
- Split Freq represents the frequency that is the boundary for applying a constant correction value. Correction using a constant correction value is performed for the band above Split Freq. Limit Gain represents the maximum value of the gain that will be the correction value.
- Reference information for sound field adjustment includes, for example, Gain, Start Point, and Length.
- Gain represents the gain used as the correction value for the reverberation component.
- Start Point represents the start position of attenuation.
- Length represents the applicable range of constant attenuation rate.
- Each piece of information as described above is recorded as header information together with adjustment values consisting of sound quality adjustment values and sound field adjustment values to form a personalized HRTF file.
- a personalized HRTF file in which adjustment value information is recorded in the header is provided to the playback device 31 .
- the processing of all the steps in FIG. 11 is described as processing performed by the information processing apparatus 1, but it is performed by other equipment prepared in the measurement environment as appropriate.
- the measurement of the personalized HRTF is performed with the producer as a listener sitting on a predetermined seat in the movie theater with the microphone 21 attached to his ear hole.
- step S1 the output control unit 122 causes the speaker 23 of the movie theater to output the reproduced sound.
- step S2 the HRTF acquisition unit 123 measures the personalized HRTF from the speaker 23 to the ear based on the sound collected by the microphone 21. After measuring the personalized HRTF from the speaker 23 to the ear, the producer wears the headphones 22 so as to cover the ears to which the microphone 21 is attached.
- step S3 the output control unit 122 causes the headphone 22 worn by the creator to output the reproduced sound.
- step S4 the HRTF acquisition unit 123 measures the personalized HRTF from the headphone 22 to the ear based on the sound collected by the microphone 21.
- step S5 the HRTF data generation unit 124 generates personalized HRTF data including the personalized HRTF from the headphone 22 to the ear and the inverse correction data of the personalized HRTF from the speaker 23 to the ear.
- step S6 the reference information acquisition unit 125 acquires reference information based on the characteristics of the headphones 22 and the measurement environment.
- step S7 the HRTF file generation unit 126 generates a personalized HRTF file in which header information including reference information and personalized HRTF data are recorded.
- the measurement of the personalized HRTF is performed using the microphone 21, but the personalized HRTF from the speaker 23 to the ear is obtained based on the ear image obtained by photographing the producer's ear.
- an inference model for personalized HRTF inference generated in advance by machine learning or the like is used.
- An inference model for personalized HRTF inference is an inference model that takes an ear image as an input and a personalized HRTF as an output.
- step S21 the file information display unit 171 performs file information display processing.
- the file information display processing By the file information display processing, the personalized HRTF file is read and the content of the attribute information is displayed.
- the file information display processing will be described later with reference to the flowchart of FIG.
- step S22 the sound quality adjustment unit 172 performs sound quality adjustment processing.
- the tone adjustment process adjusts the inverse correction data and records the tone adjustment values in the personalized HRTF file. The sound quality adjustment process will be described later with reference to the flowchart of FIG.
- step S23 the sound field adjustment unit 173 performs sound field adjustment processing.
- the sound field adjustment process adjusts the personalized HRTF data from the speaker 23 to the ear, and records the sound field adjustment values in the personalized HRTF file.
- the sound field adjustment processing will be described later with reference to FIG. 18 .
- step S31 the adjustment unit 144 reads the personalized HRTF file.
- the personalized HRTF data from the speaker to the ear and the inverse correction data are obtained. Also, attribute information and reference information are acquired.
- step S32 the file information display unit 171 displays information representing the measurement location based on the attribute information.
- step S33 the file information display unit 171 displays information representing the user name based on the attribute information.
- step S34 the file information display unit 171 displays information representing the model name of the headphones 22 used for the measurement based on the attribute information.
- FIG. 14 is a diagram showing a display example of attribute information.
- the screen shown in FIG. 14 is displayed as the main screen of the adjustment screen used for adjusting personalized HRTF data.
- Item 201 at the top of the screen represents the personalized HRTF file to be adjusted.
- "/No Name/profiles/Username" is displayed as the personalized HRTF file to be adjusted.
- An image P1 which is an image representing the measurement location, is displayed under the item 201.
- An area A1 which is a display area for attribute information, is formed on the right side of the image P1.
- Item 202 represents the name of the measurement location.
- "Room A” is displayed as the name of the measurement location.
- Item 203 represents the user name.
- "Username" is displayed as the user name.
- Item 204 represents the model name of the headphones used for the measurement.
- "Headphones" is displayed as the model name of the headphones.
- the creator can check the personalized HRTF file to be adjusted and check the measurement environment information.
- the sound quality adjustment process is started, for example, when an instruction to perform sound quality adjustment is given on the main screen of FIG.
- sound quality adjustments are made by adjusting the inverse correction data representing the inverse characteristics of the personalized HRTF from the headphones 22 to the ears.
- step S41 the sound quality adjustment unit 172 displays information representing the inverse correction data.
- step S42 the sound quality adjustment unit 172 displays the reference line of the maximum correction amount considering the device characteristics of the headphones 22 based on the reference information.
- FIG. 16 is a diagram showing a display example of the sound quality adjustment screen.
- the content of reference information for sound quality adjustment is displayed above the sound quality adjustment screen.
- Item 211 is "Split Freq", which represents the boundary frequency for applying a certain correction.
- Split Freq represents the boundary frequency for applying a certain correction.
- "11700" Hz is displayed as the boundary frequency.
- An item 212 is "Limit Gain” representing the maximum value of the gain that will be the correction value.
- "16.0" (dB) is displayed as the maximum gain value for frequencies below 11700 Hz
- "-2.0" (dB) is displayed as the maximum gain value for frequencies above 11700 Hz.
- a reference line 213 is displayed along with a waveform 214 representing inverse correction data at the bottom of the screen.
- Waveform 214 represents inverse correction data for the L channel and inverse correction data for the R channel.
- a reference line 213 represents the maximum correction amount considering the device characteristics of the headphones 22 .
- FIG. 17 shows the contents of each information.
- the creator can see the reference line 213 to see what value the gain should be.
- the producer adjusts the reference information for sound quality adjustment represented by "Split Freq” and "Limit Gain” by moving the display on the waveform 214 or the like.
- step S43 the sound quality adjustment unit 172 adjusts the reverse correction data according to the operation of the producer.
- a sound quality adjustment value which is an adjustment value of the inverse correction data, is set by the sound quality adjustment unit 172 according to the operation of the producer. Reproduction using the inverse correction data after adjustment using the sound quality adjustment value is appropriately performed by the reproduction processing unit 142 .
- step S44 the recording unit 145 records the sound quality adjustment value in the header of the personalized HRTF file.
- the sound field adjustment process is started, for example, when an instruction to perform sound field adjustment is given on the main screen of FIG.
- step S61 the sound field adjustment unit 173 displays information representing reverberation components in room A based on the personalized HRTF from the speaker 23 to the ear.
- Room A is, for example, a movie theater, which is the measurement environment.
- step S62 the sound field adjustment unit 173 displays reference lines for converting reverberation components in room A into reverberation components in room B based on the reference information.
- step S63 the sound field adjustment unit 173 displays reference lines for converting reverberation components in room A into reverberation components in room C based on the reference information.
- FIG. 19 is a diagram showing a display example of the sound field adjustment screen.
- FIG. 19 the content of reference information for sound field adjustment is displayed above the sound field adjustment screen.
- FIG. 20 shows the contents of each information.
- Item 221 is "Gain” representing the gain used as the correction value for the reverberation component.
- "-29" dB is displayed as the gain.
- Item 222 is "Start Point” representing the start position of attenuation. In the example of FIG. 19, a value of "256" is displayed as the attenuation start position.
- Item 223 is "Length", which represents the application range of the constant attenuation rate.
- "2"k is displayed as the applicable range of attenuation factor.
- Reference lines 225 to 227 are displayed along with a waveform 224 representing the reverberation component at the bottom of the screen.
- a reference line 225 represents attenuation characteristics of reverberant components in the measurement environment.
- a reference line 225 represents the start position, end position, and gain of the reverberation component in the measurement environment.
- a reference line 226 is a reference line for converting reverberation components in the measurement environment into reverberation components in "Room B”, and represents the attenuation characteristics of "Room B".
- a reference line 227 is a reference line for converting reverberation components in the measurement environment into reverberation components in "Room C”, and represents attenuation characteristics of "Room C”.
- the producer can confirm how much the reverberation component needs to be corrected.
- the creator enters numerical values in the fields of items 221 to 223 or moves the slide bars displayed next to the items 221 to 223 to obtain the values represented by "Gain”, “Start Point”, and "Length”. Adjust reference information for sound field adjustment.
- step S64 the sound field adjustment unit 173 adjusts the personalized HRTF from the speaker 23 to the ear according to the producer's operation.
- a sound field adjustment value which is an adjustment value of the personalized HRTF from the speaker 23 to the ear, is set by the sound field adjustment unit 173 according to the operation of the producer. Playback using the adjusted personalized HRTF using the sound field adjustment value is appropriately performed by the playback processing unit 142 .
- step S65 the recording unit 145 records the sound field adjustment value in the header of the personalized HRTF file.
- step S23 in FIG. 12 After the sound field adjustment values are recorded, the process returns to step S23 in FIG. 12, and the subsequent processes are performed.
- a personalized HRTF file generated by the above series of processes is provided to the playback device 31 .
- FIG. 21 is a block diagram showing a functional configuration example of the playback device 31. As shown in FIG.
- the playback processing unit 251 is realized by executing a predetermined program by the CPU of the PC that configures the playback device 31.
- the playback processing unit 251 is composed of an audio signal acquisition unit 261 , a personalized HRTF file acquisition unit 262 , an audio signal processing unit 263 and an output control unit 264 . At least part of the configuration of the playback processing unit 251 may be implemented in another device provided in the playback environment.
- the audio signal acquisition unit 261 acquires, for example, the audio signal of the audio of the movie to be edited, and outputs it to the audio signal processing unit 263 .
- the personalized HRTF file acquisition unit 262 acquires the personalized HRTF file provided from the information processing device 1 and outputs it to the audio signal processing unit 263 .
- the audio signal processing unit 263 reads the personalized HRTF data from the personalized HRTF file supplied from the personalized HRTF file acquisition unit 262, and performs binaural processing on the audio signal supplied from the audio signal acquisition unit 261. Generate a playback signal.
- the audio signal processing unit 263 appropriately adjusts the personalized HRTF data based on the adjustment values included in the header of the personalized HRTF file, and performs binaural processing using the adjusted personalized HRTF.
- the reproduced signal generated by the audio signal processing section 263 is supplied to the output control section 264 .
- the output control unit 264 causes the headphones 32 to output a reproduced sound according to the reproduced signal supplied from the audio signal processing unit 263 .
- step S81 the audio signal acquisition unit 261 acquires an audio signal of movie audio.
- step S82 the personalized HRTF file acquisition unit 262 acquires the personalized HRTF file provided from the information processing device 1.
- step S83 the audio signal processing unit 263 adjusts the personalized HRTF from the speaker 23 to the ear using the sound field adjustment value.
- the personalized HRTF from the speaker 23 to the ear is obtained from the personalized HRTF data of the personalized HRTF file, and the sound field adjustment value is obtained from the header of the personalized HRTF file.
- step S84 the audio signal processing unit 263 adjusts the inverse correction data of the characteristics from the headphone 22 to the ear using the sound quality adjustment value.
- the inverse correction data is obtained from the personalized HRTF data of the personalized HRTF file, and the sound quality adjustment value is obtained from the header portion of the personalized HRTF file.
- step S85 the audio signal processing unit 263 corrects the adjusted personalized HRTF from the speaker 23 to the ear using the adjusted inverse correction data. Specifically, correction is performed by superimposing the inverse characteristics of the adjusted personalized HRTF from the headphone 22 to the ear on the adjusted personalized HRTF from the speaker 23 to the ear.
- step S86 the audio signal processing unit 263 uses the corrected personalized HRTF to perform binaural processing on the audio signal of the audio of the movie.
- a reproduced signal is generated by binaural processing.
- step S87 the output control unit 264 causes the headphone 32 to output a reproduced sound corresponding to the reproduced signal.
- the audio producer of the movie can adjust the HRTF personalized to himself.
- the personalized HRTF itself By making it possible to adjust the personalized HRTF itself, it becomes possible to reproduce the sound quality and sound field required in movie sound and music production.
- the individualized HRTF is adjusted in the measurement environment
- the individualized HRTF may be adjusted in an environment different from the measurement environment.
- the creator adjusts the personalized HRTF data using headphones 22 brought back from the measurement environment.
- the sound production system shown in FIG. 1 is used to produce sound for movies, it can also be used for producing various sounds such as a system used for producing music and a system used for producing sound for television programs.
- the sound production system of FIG. 1 can be applied to the system.
- the personalized HRTF data may be adjusted as described above when playing back audio on a consumer device, rather than when creating content audio.
- HRTF Information recorded in the form of HRTF, which is information in the frequency domain, is used as the head-related transfer function that represents the transfer characteristics of sound. Recorded information may be used.
- FIG. 23 is a block diagram showing an example of the hardware configuration of a computer that executes the series of processes described above by a program.
- the information processing device 1 and the playback device 31 are configured by PCs having the same configuration as that shown in FIG.
- a CPU (Central Processing Unit) 501 , a ROM (Read Only Memory) 502 and a RAM (Random Access Memory) 503 are interconnected by a bus 504 .
- An input/output interface 505 is further connected to the bus 504 .
- the input/output interface 505 is connected to an input unit 506 such as a keyboard and a mouse, and an output unit 507 such as a display and a speaker.
- the input/output interface 505 is also connected to a storage unit 508 including a hard disk and nonvolatile memory, a communication unit 509 including a network interface, and a drive 510 for driving a removable medium 511 .
- the CPU 501 loads, for example, a program stored in the storage unit 508 into the RAM 503 via the input/output interface 505 and the bus 504 and executes the above-described series of processes. is done.
- Programs executed by the CPU 501 are, for example, recorded on the removable media 511, or provided via wired or wireless transmission media such as local area networks, the Internet, and digital broadcasting, and installed in the storage unit 508.
- the program executed by the computer may be a program in which processing is performed in chronological order according to the order described in this specification, or a program in which processing is performed in parallel or at necessary timing such as when a call is made. It may be a program that is carried out.
- a system means a set of multiple components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Therefore, a plurality of devices housed in separate housings and connected via a network, and a single device housing a plurality of modules in one housing, are both systems. .
- Embodiments of the present technology are not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present technology.
- this technology can take the configuration of cloud computing in which one function is shared by multiple devices via a network and processed jointly.
- each step described in the flowchart above can be executed by a single device, or can be shared by a plurality of devices.
- one step includes multiple processes
- the multiple processes included in the one step can be executed by one device or shared by multiple devices.
- An information processing apparatus comprising an adjusting unit that adjusts a personalized transfer characteristic, which is a transfer characteristic of sound in a measurement environment and is the transfer characteristic personalized by a user, according to an operation by the user.
- the information processing apparatus according to (1) further comprising a presenting unit that presents to the user, together with the personalized transfer characteristic, reference information to be referred to when adjusting the personalized transfer characteristic.
- the adjustment unit adjusts the personalized transfer characteristic measured based on a reproduced sound output from an output device worn by the user.
- the presentation unit presents the content of the reference information acquired based on device characteristics of the output device.
- the information processing apparatus further comprising a recording unit that records, in the header portion, an adjustment value according to the user's operation.
- the presentation unit presents content of attribute information including information representing the location of the measurement environment, information representing the user who uses the personalized transfer characteristic in the reproduction environment, and information representing the output device worn by the user.
- the information processing apparatus according to (8) or (9).
- (11) The information processing apparatus according to (10), wherein the attribute information is recorded in the header portion.
- the information processing device An information processing method for adjusting a personalized transfer characteristic, which is a transfer characteristic of sound in a measurement environment and is the transfer characteristic personalized by a user, according to an operation of the user.
- Adjusting a personalized transfer characteristic, which is a transfer characteristic of sound in a measurement environment and is the transfer characteristic personalized to a user, based on an adjustment value set by adjustment by the user, and performing the adjusted personalized transfer A reproduction device comprising a reproduction unit for reproducing an audio signal using characteristics.
- the reproducing unit is configured to measure the first personalized transfer characteristic based on the reproduced sound output from the speaker installed in the measurement environment and the reproduced sound output from the output device worn by the user.
- the playback device according to (14) above, which adjusts the measured second personalized transfer characteristics, respectively.
- the reproducing unit corrects the first personalized transfer characteristic by superimposing an inverse characteristic of the second personalized transfer characteristic after adjustment on the first personalized transfer characteristic after adjustment, and corrects The reproduction device according to (15), which reproduces an audio signal using the first personalized transfer characteristic that is later used.
- the playback device adjusting a personalized transfer characteristic, which is the transfer characteristic of sound in the measurement environment and is the transfer characteristic personalized to the user, based on an adjustment value set by the adjustment by the user; A reproduction method for reproducing an audio signal using the adjusted personalized transfer characteristic.
- a personalized transfer characteristic which is the transfer characteristic of sound in the measurement environment and is the transfer characteristic personalized to the user, based on an adjustment value set by the adjustment by the user;
- 1 information processing device 1A display, 21 microphone, 22 headphones, 31 playback device, 31A display, 32 headphones, 101 information processing unit, 111 file generation unit, 112 adjustment value recording unit, 121 playback processing unit, 122 output control unit, 123 HRTF acquisition unit, 124 HRTF data generation unit, 125 reference information acquisition unit, 126 HRTF file generation unit, 141 personalized HRTF file acquisition unit, 142 reproduction processing unit, 143 output control unit, 144 adjustment unit, 145 recording unit, 171 File information display section, 172 Sound quality adjustment section, 173 Sound field adjustment section, 251 Playback processing section, 261 Audio signal acquisition section, 262 Personalized HRTF file acquisition section, 263 Audio signal processing section, 264 Output control section
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Abstract
Description
1.音響制作システムの構成
2.音響制作システムにおける作業の全体の流れ
3.情報処理装置の構成と動作
4.再生機器の構成と動作
5.変形例
図1は、本技術の一実施の形態に係る音響制作システムの構成例を示す図である。
測定環境と再生環境のそれぞれにおいて行われる作業の流れについて説明する。測定環境においては、測定と調整の作業がそれぞれ行われる。
図2は、測定環境における測定の流れを示す図である。
図2の左側に示すように、HRTFの測定は、例えば、聴取者が映画館の所定の座席に座り、耳穴にマイク(マイクロフォン)21を取り付けた状態で行われる。
図2の右側に示すように、個人化HRTFの調整時に制作者により参照される情報であるリファレンス情報が取得される。リファレンス情報は、例えば、測定環境の特性やヘッドホン22のデバイス特性などに基づいて取得される。リファレンス情報の詳細については後述する。
図3は、測定環境における調整の流れを示す図である。
図5は、再生環境における再生の流れを示す図である。
<情報処理装置の構成>
図6は、情報処理装置1の機能構成例を示すブロック図である。
図7は、ファイル生成部111の構成例を示すブロック図である。
図9は、調整値記録部112の構成例を示すブロック図である。
ここで、以上のような構成を有する情報処理装置1の処理について説明する。
図11のフローチャートを参照して、測定環境において情報処理装置1が行う個人化HRTFファイル生成処理について説明する。
次に、図12のフローチャートを参照して、測定環境において情報処理装置1が行う個人化HRTF調整処理について説明する。
図13のフローチャートを参照して、図12のステップS21において行われるファイル情報表示処理について説明する。
図15のフローチャートを参照して、図12のステップS22において行われる音質調整処理について説明する。
図18のフローチャートを参照して、図12のステップS23において行われる音場調整処理について説明する。
<再生機器の構成>
図21は、再生機器31の機能構成例を示すブロック図である。
図22のフローチャートを参照して、再生環境において再生機器31が行う再生処理について説明する。
音声の出力機器としてオーバーヘッド型のヘッドホンが用いられるものとしたが、インナーイヤー型のヘッドホン(イヤホン)が用いられるようにしてもよい。また、ヘッドホンではなく、スピーカが音声の出力機器として用いられるようにしてもよい。
上述した一連の処理は、ハードウェアにより実行することもできるし、ソフトウェアにより実行することもできる。一連の処理をソフトウェアにより実行する場合には、そのソフトウェアを構成するプログラムが、専用のハードウェアに組み込まれているコンピュータ、または汎用のパーソナルコンピュータなどに、プログラム記録媒体からインストールされる。
(1)
測定環境における音の伝達特性であり、ユーザに個人化された前記伝達特性である個人化伝達特性を、前記ユーザの操作に応じて調整する調整部を備える
情報処理装置。
(2)
前記個人化伝達特性の調整時に参照されるリファレンス情報の内容を、前記個人化伝達特性とともに前記ユーザに提示する提示部をさらに備える
前記(1)に記載の情報処理装置。
(3)
前記調整部は、前記ユーザが装着する出力機器から出力された再生音に基づいて測定された前記個人化伝達特性を調整する
前記(2)に記載の情報処理装置。
(4)
前記提示部は、前記出力機器のデバイス特性に基づいて取得された前記リファレンス情報の内容を提示する
前記(3)に記載の情報処理装置。
(5)
前記調整部は、前記測定環境に設置されたスピーカから出力された再生音に基づいて測定された前記個人化伝達特性を調整する
前記(2)乃至(4)のいずれかに記載の情報処理装置。
(6)
前記提示部は、前記測定環境における音の残響特性に基づいて取得された前記リファレンス情報の内容を提示する
前記(5)に記載の情報処理装置。
(7)
前記提示部は、前記測定環境とは異なる規定の空間における音の残響特性を表す前記リファレンス情報の内容を提示する
前記(6)に記載の情報処理装置。
(8)
前記リファレンス情報は、前記個人化伝達特性のデータが記録されたファイルのヘッダ部に記録される
前記(2)乃至(7)のいずれかに記載の情報処理装置。
(9)
前記ユーザの操作に応じた調整値を、前記ヘッダ部に記録する記録部をさらに備える
前記(8)に記載の情報処理装置。
(10)
前記提示部は、前記測定環境の場所を表す情報、前記個人化伝達特性を再生環境において使用する前記ユーザを表す情報、および、前記ユーザが装着する出力機器を表す情報を含む属性情報の内容を提示する
前記(8)または(9)に記載の情報処理装置。
(11)
前記属性情報は、前記ヘッダ部に記録される
前記(10)に記載の情報処理装置。
(12)
情報処理装置が、
測定環境における音の伝達特性であり、ユーザに個人化された前記伝達特性である個人化伝達特性を、前記ユーザの操作に応じて調整する
情報処理方法。
(13)
コンピュータに、
測定環境における音の伝達特性であり、ユーザに個人化された前記伝達特性である個人化伝達特性を、前記ユーザの操作に応じて調整する
処理を実行させるためのプログラム。
(14)
測定環境における音の伝達特性であり、ユーザに個人化された前記伝達特性である個人化伝達特性を、前記ユーザによる調整によって設定された調整値に基づいて調整し、調整後の前記個人化伝達特性を用いて音声信号を再生する再生部を備える
再生機器。
(15)
前記再生部は、前記測定環境に設置されたスピーカから出力された再生音に基づいて測定された第1の個人化伝達特性と、前記ユーザが装着する出力機器から出力された再生音に基づいて測定された第2の個人化伝達特性とをそれぞれ調整する
前記(14)に記載の再生機器。
(16)
前記再生部は、調整後の前記第2の個人化伝達特性の逆特性を、調整後の前記第1の個人化伝達特性に重畳することによって前記第1の個人化伝達特性を補正し、補正後の前記第1の個人化伝達特性を用いて音声信号を再生する
前記(15)に記載の再生機器。
(17)
再生機器が、
測定環境における音の伝達特性であり、ユーザに個人化された前記伝達特性である個人化伝達特性を、前記ユーザによる調整によって設定された調整値に基づいて調整し、
調整後の前記個人化伝達特性を用いて音声信号を再生する
再生方法。
(18)
コンピュータに、
測定環境における音の伝達特性であり、ユーザに個人化された前記伝達特性である個人化伝達特性を、前記ユーザによる調整によって設定された調整値に基づいて調整し、
調整後の前記個人化伝達特性を用いて音声信号を再生する
処理を実行させるためのプログラム。
Claims (13)
- 測定環境における音の伝達特性であり、ユーザに個人化された前記伝達特性である個人化伝達特性を、前記ユーザの操作に応じて調整する調整部を備える
情報処理装置。 - 前記個人化伝達特性の調整時に参照されるリファレンス情報の内容を、前記個人化伝達特性とともに前記ユーザに提示する提示部をさらに備える
請求項1に記載の情報処理装置。 - 前記調整部は、前記ユーザが装着する出力機器から出力された再生音に基づいて測定された前記個人化伝達特性を調整する
請求項2に記載の情報処理装置。 - 前記提示部は、前記出力機器のデバイス特性に基づいて取得された前記リファレンス情報の内容を提示する
請求項3に記載の情報処理装置。 - 前記調整部は、前記測定環境に設置されたスピーカから出力された再生音に基づいて測定された前記個人化伝達特性を調整する
請求項2に記載の情報処理装置。 - 前記提示部は、前記測定環境における音の残響特性に基づいて取得された前記リファレンス情報の内容を提示する
請求項5に記載の情報処理装置。 - 前記提示部は、前記測定環境とは異なる規定の空間における音の残響特性を表す前記リファレンス情報の内容を提示する
請求項6に記載の情報処理装置。 - 前記リファレンス情報は、前記個人化伝達特性のデータが記録されたファイルのヘッダ部に記録される
請求項2に記載の情報処理装置。 - 前記ユーザの操作に応じた調整値を、前記ヘッダ部に記録する記録部をさらに備える
請求項8に記載の情報処理装置。 - 前記提示部は、前記測定環境の場所を表す情報、前記個人化伝達特性を再生環境において使用する前記ユーザを表す情報、および、前記ユーザが装着する出力機器を表す情報を含む属性情報の内容を提示する
請求項8に記載の情報処理装置。 - 前記属性情報は、前記ヘッダ部に記録される
請求項10に記載の情報処理装置。 - 情報処理装置が、
測定環境における音の伝達特性であり、ユーザに個人化された前記伝達特性である個人化伝達特性を、前記ユーザの操作に応じて調整する
情報処理方法。 - コンピュータに、
測定環境における音の伝達特性であり、ユーザに個人化された前記伝達特性である個人化伝達特性を、前記ユーザの操作に応じて調整する
処理を実行させるためのプログラム。
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US20200257548A1 (en) * | 2019-02-08 | 2020-08-13 | Sony Corporation | Global hrtf repository |
JP2020201479A (ja) * | 2019-06-10 | 2020-12-17 | ジェネレック・オーワイGenelec Oy | 頭部伝達関数を生成するシステム及び方法 |
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