WO2006107102A1 - 音声信号処理装置及び音声信号処理方法 - Google Patents
音声信号処理装置及び音声信号処理方法 Download PDFInfo
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- WO2006107102A1 WO2006107102A1 PCT/JP2006/307397 JP2006307397W WO2006107102A1 WO 2006107102 A1 WO2006107102 A1 WO 2006107102A1 JP 2006307397 W JP2006307397 W JP 2006307397W WO 2006107102 A1 WO2006107102 A1 WO 2006107102A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
- H04N5/772—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera the recording apparatus and the television camera being placed in the same enclosure
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/027—Spatial or constructional arrangements of microphones, e.g. in dummy heads
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/7824—Television signal recording using magnetic recording on tape with rotating magnetic heads
- H04N5/7826—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape
- H04N5/78263—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape for recording on tracks inclined relative to the direction of movement of the tape
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/84—Television signal recording using optical recording
- H04N5/85—Television signal recording using optical recording on discs or drums
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/806—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal
- H04N9/8063—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal using time division multiplex of the PCM audio and PCM video signals
Definitions
- the present invention relates to an audio signal processing device and an audio signal processing method, and can be applied to, for example, a camera-integrated video tape recorder.
- the present invention detects the setting of audio signal channels input from a plurality of audio signal input terminals, and performs signal processing by switching the right channel and the left channel based on the detection result, so that the stereo system is used. Even when recording with multiple microphone mouthphones using the surround method, create a sound field with a high sense of presence. Background art
- a video tape recorder with a built-in camera is configured to acquire a stereo two-channel audio signal using a built-in microphone, and record the two-channel audio signal together with the imaging result on a magnetic tape.
- Japanese Utility Model Publication No. 5- 1 1 6 5 0 discloses that an audio signal reproduced from a magnetic tape and an audio signal obtained by a built-in microphone are mixed.
- a method has been proposed that can output and easily execute narration and other processing.
- Some of these camera-integrated video tape recorders can record audio signals in 4 channels.
- multiple stereo microphones are connected to surround sound. The signal can be recorded.
- the stereo microphone 2M using the stereo method and the sub microphone 2S using the stereo method with different directivity from the main microphone 2M are used.
- the front voice is acquired using the and the four-channel audio signals are recorded by these main and sub microphones 2M and 2S.
- the method is referred to as the front-only surround method, as appropriate.
- main and sub microphones 2M and 2S can be connected respectively, and main and sub audio input terminals are provided respectively.
- the stereo audio signals output from the main and sub microphones 2M and 2S are input via the.
- voice may be obtained from the front and rear instead of obtaining the voice from only the front.
- the front and rear surround system it will be referred to as the front and rear surround system as appropriate.
- this type of camera-integrated video tape recorder has a front right channel microphone FR, a front left channel microphone FL, and a rear right channel as shown in FIG. 2 in comparison with FIG.
- the microphone 2 for surround sound and the microphone RL for the left rear channel are integrated, and the microphone 2 is used to record four-channel audio signals using the front and rear surround methods. It is formed to be able to.
- portable video recorders that use optical discs such as DVDs (Digital Versatile Disks) as recording media can process 5.1-channel surround sound signals by processing the audio signals obtained in this manner.
- a system for recording audio signals according to the system is provided.
- two stereo microphones 2 F and 2 R are used for the front and rear, respectively. Audio may be acquired.
- the rear microphone 2R is horizontally oriented with the video tape recorder 1 with the camera in the center, and the other microphone 2S. Therefore, the right channel microphone and the left channel microphone are interchanged between the rear microphone 2R and the one microphone 2S. Therefore, when performing front and rear surround recording with two microphones 2 F and 2 R, the right channel is applied to the rear microphone 2 R. If the left channel and the left channel are not interchanged, there is a problem that a sound field with high presence cannot be created correctly.
- the internal connections of the microphones RR and RL on the rear side are switched so as to support the surround system with only the front.
- the present invention has been made in consideration of the above points, and even when recording with a surround system using a plurality of stereo microphones, an audio that can correctly create a sound field with a high sense of presence. I would like to propose a signal processing device and an audio signal processing method. .
- the present invention is applied to an audio signal processing apparatus, and a plurality of audio signal input terminals that respectively input audio signals in a stereo system, and an audio signal input from the plurality of audio signal input terminals
- a right channel is applied to a plurality of audio signal input terminals that are applied to an audio signal processing device and respectively input stereo audio signals and audio signals input from the plurality of audio signal input terminals.
- setting detection means for detecting the setting of the left channel and signal processing means for signal processing audio signals input from the plurality of audio signal input terminals, wherein the signal processing means comprises the detection means Input from at least one of the plurality of audio signal input terminals based on the detection result of If the right channel and left channel of the audio signal are switched and processed, the right channel and left channel of the audio signal will correspond to the settings of the right channel and left channel of the audio signal input from the audio signal input terminal.
- the signal can be processed by replacing the channel.
- the right channel and left channel inputs can be set correctly and processed. Also, even when recording with the surround system using multiple stereo microphones, it is possible to correctly create a sound field with a high sense of presence.
- the present invention is applied to an audio signal processing method in which stereo audio signals are input from a plurality of audio signal input terminals to perform signal processing, and audio signals input from the plurality of audio signal input terminals. And detecting a setting of the right channel and the left channel, and based on the detection result, at least one of the plurality of audio signal input terminals.
- the right channel and left channel of the audio signal input from one are interchanged to process the signal.
- an audio signal input from the plurality of audio signal input terminals is applied to an audio signal processing method in which a stereo audio signal is input from a plurality of audio signal input terminals and processed. Detecting the setting of the right channel and the left channel, and switching the right channel and the left channel of the audio signal input from at least one of the plurality of audio signal input terminals based on the detection result, As a result, it is possible to provide an audio signal processing method that can correctly create a sound field with a high sense of presence even when recording with the surround system using a plurality of stereo microphones. . According to the present invention, it is possible to correctly create a sound field with a high sense of presence even in the case of recording in a surround system using two stereo microphones.
- Figure 1 shows the surround method using only a stereo microphone. It is an approximate line figure used for explanation of a formula.
- FIG. 2 is a schematic diagram for explaining a front and rear surround system using a single microphone.
- FIG. 3 is a schematic diagram for explaining the front and rear surround systems using stereo microphones.
- FIG. 4 is a block diagram showing the editing system according to Embodiment 1 of the present invention.
- FIG. 5 is a block diagram showing a camera-integrated video tape recorder applied to the editing system of FIG.
- FIG. 6 is a schematic diagram showing a recording format in the camera-integrated video tape recorder of FIG.
- FIG. 7 is a block diagram showing an audio input unit of the camera-integrated video tape recorder of FIG.
- FIG. 8 is a flowchart showing the processing procedure of the controller according to the voice input unit of FIG.
- FIG. 9 is a flowchart showing the processing procedure of the controller according to the surround system of the voice input unit of FIG.
- FIG. 10 is a block diagram for explaining the operation of the audio signal of FIG.
- FIG. 11 is a block diagram for explaining the operation at the time of surround recording only in front of the sound processing unit of FIG.
- FIG. 12 is a block diagram showing a computer applied to the editing system of FIG.
- FIG. 13 is a block diagram showing a camera-integrated video recorder according to Embodiment 2 of the present invention.
- FIG. 14 is a block diagram showing an audio input unit of the camera-integrated video recorder of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 4 is a block diagram showing the editing system according to Embodiment 1 of the present invention.
- this editing system 11 the various imaging results captured by the camera-integrated video tape recorder 12 are edited by the computer 13 and recorded on the optical disc.
- the camera-integrated video tape recorder 12 acquires the audio signal and the video signal based on the imaging result in response to the user's operation, records it on the magnetic tape, and records it on the magnetic tape.
- Audio signal SA and video signal SV are played and output to computer 13.
- the computer 1 3 records and holds the audio signal SA and the video signal SV output from the camera-integrated video tape recorder 1 2 according to the user's operation, and the recorded audio signal according to the user's operation.
- SA and video signal SV are edited and recorded on the optical disc.
- FIG. 5 is a block diagram showing a camera-integrated video tape recorder 12.
- the imaging unit 15 acquires an imaging result under the control of the controller 16 and outputs a video signal SV based on the imaging result.
- the audio input unit 17 acquires and processes the audio signal SA under the control of the controller 16.
- the encoder 18 compresses the video signal SV and the audio signal S A obtained from the imaging unit 15 and the audio input unit 17 by, for example, MP EG (Moving Picture Experts Group), and generates encoded data.
- MP EG Motion Picture Experts Group
- the recording / playback unit 19 switches its operation under the control of the controller 16 and, during recording, drives the magnetic head 20 with the encoded data generated by the encoder 18 to form recording tracks on the magnetic tape 21 in sequence. Record the audio signal SA and video signal SV. In this process, the recording / reproducing unit 19 records various types of information output from the controller 16 on the magnetic tape 21 together. The recording / reproducing unit 19 reproduces the encoded data recorded in this way from the magnetic tape 21 and outputs it to the decoder 22 at the time of reproduction, and reproduces various information recorded at the time of recording to reproduce the controller. 1 Output to 6.
- FIG. 6 is a schematic diagram showing a recording format in the magnetic tape 21.
- 16 tracks are set as the interleave processing unit (ECC), and video data (1, P, B) and audio data (A) are recorded in picture units. Also, every 3 pictures, video Data auxiliary data (u) and audio data auxiliary data (X) are recorded.
- ECC interleave processing unit
- u video Data auxiliary data
- X audio data auxiliary data
- the recording / playback unit 19 corresponds to this recording format by using encoded data from the video signal SV and audio signal SA output from the encoder 18 and various data output from the controller 16.
- the magnetic head 20 is driven and these data are recorded on the magnetic tape 21.
- the decoder 22 decompresses the encoded data output from the recording / reproducing unit 19 and reproduces the original video signal S V and audio signal S A.
- the monitor unit 23 drives the liquid crystal display panel by the video signal S V reproduced by the decoder 22 or by the video signal S V obtained from the imaging unit 15 and displays the imaging result and the reproduction result.
- the earphone connected to the earphone jack of the camera-integrated video tape recorder 1 2 is driven by the audio signal SA output from the audio input unit 17 or by the audio signal SA reproduced by the decoder 2 2. These audio signals SA can be monitored.
- the output unit 24 is, for example, an interface such as IEEE (The Institute of Electrical and Electrical Engineers, Inc.) 1 3 94, and the video signal SV, audio signal SA, or imaging unit that is played back by the decoder 2 2. 15 Outputs the video signal SV and audio signal SA obtained from the audio input unit 17 to an external device together with various information output from the controller 16. In this embodiment, this external device is set in the computer 13 described above.
- IEEE The Institute of Electrical and Electrical Engineers, Inc.
- the operation unit 25 is formed of an operator provided in each part of the camera-integrated video tape recorder 12 and a touch panel provided in the monitor unit 23, and notifies the controller 16 of various operations by the user. .
- the controller 16 is a computer that controls the operation of the force-meller type video tape recorder 12 and controls the operation of each unit according to the operation of the operation unit 25 by executing a predetermined processing procedure.
- FIG. 7 is a block diagram showing the configuration of the audio input unit 17 of the camera-integrated video tape recorder 12.
- the built-in microphone (built-in microphone) 31 is disposed, for example, in front of the camera-integrated video tape recorder 12, and outputs right channel and left channel audio signals FRI and FLI.
- Audio jacks 3 2 F and 3 2 R are the audio input terminals to which the integrated microphone 2 of the surround system described above with reference to Fig. 2 is connected, for front and rear (main and sub) respectively. 2 channel audio signals are input to the.
- Audio jacks 3 2 F and 3 2 R are connected signals S 1 and S 2 that detect the connection of the microphone when the plug of the microphone is connected and the contact of the switch circuit provided inside is switched off. Is notified to the controller 16.
- the voice synthesis switching unit 33 receives the audio signals FRI and FLI output from the built-in microphone 31 and the audio signals FR and FL input from the front audio jack 3 2 F, and controls the controller 16 Thus, any audio signal is selectively output, or these audio signals are synthesized and output.
- the audio signal output from the audio synthesis switching unit 3 3 is input to the audio processing unit 3 6 and connected to the built-in microphone 3 1 and the audio jack 3 2 F.
- the audio signal is recorded on the magnetic tape 21 by selectively using an external microphone, and the audio signal is synthesized to be recorded on the magnetic tape 21.
- the audio switching unit 3 4 inputs the audio signals RR and RL inputted from the rear audio jack 3 2 R, and outputs the inputted audio signals RR and RL as it is under the control of the controller 16. Also, the right channel and left channel are interchanged for output.
- the camera-integrated video tape recorder 1 2 By switching the channels in the audio switching unit 3 4, the camera-integrated video tape recorder 1 2 connects the two stereo microphones 3 5 F and 3 5 R to the audio jacks 3 2 F and 3 2 R, respectively.
- the audio processing unit is created so that the sound signal can be recorded with the correct polarity and a highly realistic sound field can be created correctly.
- 3 6 corrects the signal level of the voice signal output from the voice synthesis switching unit 3 3 and the voice switching unit 3 4 and outputs it to the encoder 1 8 and the monitor unit 2 3.
- Controller 1 6 is connected via audio jack 3 2 F, 3 2 R By detecting the connection of the external microphone to the audio jacks 3 2 F and 3 2 R based on the signals S 1 and S 2, respectively, and executing a predetermined processing procedure based on the detection result, the voice synthesis switching unit 3 3, Controls the operation of the audio switching unit 3 4 etc.
- the controller 16 starts the processing procedure of FIG. 8 and proceeds from step SP 1 to step SP 2.
- the controller 16 detects the setting of the voice input switch provided in the operation unit 25 and detects the voice input selection by the user. If the audio input switch is set so that the user selects an external microphone here, the controller 1 6 moves from step SP 2 to step SP 3, and the external microphone input from the audio jack 3 2 F After setting the operation of the voice synthesis switching unit 33 so that the voice signals FL and FR are selectively input to the voice processing unit 36, the process returns to step SP2.
- step SP 2 the controller 1 6 moves from step SP 2 to step SP 4, and the sound output from the built-in microphone 31.
- Step SP 2 to Step SP 4 in this embodiment, even when an external microphone is connected, the built-in microphone and the external microphone can be switched as necessary to obtain an audio signal. It is possible to improve usability compared to the past. Specifically, if the microphones are switched in this way, when the photographer is an interviewer, the interviewed voice and the interviewer's voice can be recorded alternately, and post-processing editing processing is performed. Etc. can be simplified.
- controller 16 moves from step SP 2 to step SP 5, and the external microphone input from audio jack 3 2 F Set the operation of the voice synthesis switching unit 3 3 so that the audio signals FL, FR and the audio signals FLI, FRI output from the built-in microphone 31 are mixed and input to the audio processing unit 36. After that, go back to Step SP 2.
- background audio and interview audio can be synthesized and recorded by the processing of step SP 2 and step SP 5, which simplifies the post-processing editing process and improves usability. can do.
- the controller 16 starts the processing procedure shown in FIG. 1 Move from 1 to step SP 1 2.
- the controller 16 detects the setting of the system setting switch related to the surround recording provided in the operation unit 25, and detects the selection of the surround recording by the user.
- this system setting switch is formed by, for example, a slide switch, and surround system using only two stereo microphones (see FIG. 1) and two stereo systems.
- the front and rear surround system using a microphone (see Fig. 3) and the front and rear surround system using an integrated microphone (see Fig. 2) can be selected.
- this system setting switch constitutes a setting detecting means for detecting the setting of the right channel and the left channel for the audio signal input from the audio jack 3 2 R for the sub microphone, and a plurality of audio signals are input. -Configure the system detection means to detect the surround system by audio signal input from DIOJACK 3 2 F, 3 2 R.
- the controller 16 determines whether the surround recording by the user is based on the front and rear surround systems using two stereo microphones based on the detection result of the system setting switch. If a positive result is obtained here, the controller 16 proceeds from step SP 1 2 to step SP 13 and instructs the audio switching unit 3 4 to output switching between the right channel and the left channel, and then step SP 1 Go to 4. On the other hand, if a negative result is obtained in step SP 1 2, controller 16 directly proceeds from step SP 1 2 force to step SP 14 without instructing such polarity switching. .
- step SP 1 2 and step SP 13 in this embodiment, even in the case of surround recording in the various forms described above with reference to FIGS. 1 to 3, It is configured so that a highly realistic sound field can be created correctly.
- step S P 14 the controller 16 determines whether the surround recording by the user is the front or rear surround system based on the setting of the system setting switch. If a positive result is obtained here, the controller 1 6 moves from step SP 1 4 to step SP 1 5 and sets the identification code of the 4-channel audio signal to be recorded on the magnetic tape 2 1 as auxiliary data of the audio data in the front and Set to the identification code based on the surround method. Also, as shown in Fig. 10, after setting the operation of the audio processing unit 3 6 to encode the audio input from the external microphones 35 F and 35 R for each channel, step SP 1 6 Go to and end this procedure.
- step SP 14 the controller 1 6 moves from step SP 1 4 to step SP 1 7 and records it on the magnetic tape 2 1 as auxiliary data of audio data 4 Set the identification code of the channel audio signal to the surround identification code by the front only.
- each audio jack 3 2 F, 3 2 R is the same as described above for Fig. 10.
- the process proceeds to step SP 16.
- the audio input from the rear audio jack 3 2 R on the rear side as shown in Fig. 11.
- the audio processing unit 36 is configured to add and encode the audio signals input from the front and rear audio jacks 3 2 F and 3 2 R. After setting the operation, the process proceeds to step SP 16 to end this processing procedure.
- this identification code is recorded on the magnetic tape 21 as audio data capture data, and this identification code recorded on the magnetic tape 21 is used as a video signal and audio signal. And played back to computer 1 3.
- the audio signal recorded on the magnetic tape 21 by the computer 13 is subjected to signal processing and the 5.1 channel support is performed.
- the sound signal is correctly processed and a sound field with high presence can be formed.
- FIG. 12 is a block diagram showing the computer 13.
- the optical disk drive 41 transfers the data output to the path BUS under the control of the central processing unit (CPU) 42.
- the data recorded on the optical disc is reproduced, and the data recorded on the optical disc is reproduced and output to the bus BUS.
- the interface 43 is an interface such as I EEE. 1 394, which acquires the video signal SV, audio signal S A, and various related information output from the camera-integrated video tape recorder 12 and outputs them to the path BUS.
- the monitor unit 44 displays various images related to the processing of the computer 13, and further reproduces and outputs various sounds and the like.
- the hard disk drive (HDD) 45 records the application program used for the processing of the computer 13, the video signal SV input through the interface 43, the audio signal SA, etc., and plays back these recordings. Output.
- the central processing unit 42 secures a work area in the random access memory (RAM) 47 according to the recording in the read-only memory (ROM) 46, starts it, and then executes various application programs recorded in the hard disk device 45 according to the user's operation. To do.
- RAM random access memory
- ROM read-only memory
- the central processing unit 42 controls the operation of the interface 43 and the hard disk device 45 according to the user's operation when the application program related to the processing of the moving image file is launched by the user.
- the video signal SV and audio signal SA reproduced by the video tape recorder 1 2 are captured together with related information and recorded on the hard disk device 45.
- the video signal SV and audio signal SA are set to be monitorable by the monitor unit 44.
- the application program related to the processing of the moving image file is provided by being preinstalled in the computer 13, but instead of provision by such preinstallation, such as the Internet, etc. Download via network: You may be provided by a down-link through various recording media such as optical disk, magnetic disk, memory card, etc. You may make it provide by a mode.
- the central processing unit 42 when the central processing unit 42 is instructed to edit the video signal SV and audio signal SA recorded in the hard disk device 45, the central processing unit 42 receives the editing point setting by non-linear editing, and performs the effect processing video signal, etc. if necessary. Is generated.
- the video signal SV and the audio signal SA based on the editing process result are transferred from the hard disk device 45 to the optical disk drive 41, and the optical disk The video signal SV and audio signal SA are recorded in
- the central processing unit 42 performs arithmetic processing on the sound signal output from the hard disk device 45, thereby
- the 4-channel audio signal SA input from the body-type video tape recorder 1 2 is converted to a 5.1-channel surround sound signal, and this 5.1-channel audio signal is converted into an optical disk by the optical disk drive 4 1.
- the central processing unit 42 generates a 5.1-channel audio signal by switching the arithmetic processing according to the surround identification code that is reproduced from the magnetic tape 21 as the data accompanying the audio signal SA.
- the audio signal is processed so that a realistic sound field can be reproduced.
- this editing system 11 (Fig. 4) carries a camera-integrated video tape recorder 12 to record various scenes, and these recorded scenes are also integrated into the camera. It is played back by the video tape recorder 1 2 and input to the computer 1 3, edited and recorded on the optical disc.
- the video signal SV acquired by the imaging unit 15 and the audio signal SA acquired by the audio input unit 17 are encoded by the encoder 18. Then, the data is compressed to generate encoded data, and the encoded data is recorded on the magnetic tape 21 by the recording / reproducing unit 19. In addition, the video signal SV and the audio signal SA recorded as described above are reproduced as encoded data by the recording / reproducing unit 19, and the encoded data is decompressed and reproduced by the decoder 22. And output to the computer 13 through the output unit 24.
- the audio signal SA recorded on the magnetic tape 21 with the video signal SV in this way does not connect the external microphones 3 5 F and 3 5 R to the audio jacks 3 2 F and 3 2 R
- the audio signal obtained by the built-in microphone 3 1 and recorded in stereo by the built-in microphone 3 1 is recorded on the magnetic tape 21.
- the connection of the external microphone 35 F is detected by the controller 16 via the audio jack 3 2 F. Also, by this detection, the setting of the voice input switch provided in the operation unit 25 is detected by the controller 16.
- the audio signal from the built-in microphone 3 1 is selectively input to the encoder 18 through the voice synthesis switching unit 3 3 and the audio processing unit 36, and the audio signal from the built-in microphone 3 1 is recorded on the magnetic tape 21.
- the audio signal from the external microphone 3 5 F input via the audio jack 3 2 F is selectively used as the voice synthesis switching unit 3 3
- the audio signal is input to the encoder 18 through the audio processing unit 36, and the audio signal from the external microphone 35 F is recorded on the magnetic tape 21.
- the voice signal from the built-in microphone 3 1 and the voice signal and force S from the external microphone 3 5 F input via the audio jack 3 2 F, S, voice
- the audio signal from the built-in microphone 3 1 and the audio signal from the external microphone 3 5 F are synthesized. Recorded on magnetic tape 2 1.
- the audio jack for the front 3 2 F and the audio jack for the rear When the external microphones 3 5 F and 3 5 R are connected to the jack 3 2 R, the connection of these external microphones 3 5 F and 3 5 R is detected by the controller 16 via the audio jacks 3 2 F and 3 2 R Is done. Also, by this detection, the setting of the method setting switch related to the surround method provided in the operation unit 25 is detected by the controller 16.
- the controller 16 controls the user to connect the front and rear surround-type integrated microphone 2 (Fig. 2) to these audio jacks 3 2 F and 3 2 R.
- the audio signals of 4 channels obtained from these audio jacks 3 2 F and 3 2 R are processed as they are by the encoder 18 and recorded on the magnetic tape 21.
- the four-channel audio signals obtained from these audio jacks 3 2 F and 3 2 R are subjected to predetermined signal processing. (Fig. 11), the data is processed by the encoder 18 and recorded on the magnetic tape 21.
- the audio switching unit The right and left channels of the audio signal assigned to the rear by 3 4 are interchanged, and the audio signal of 4 channels obtained from audio jacks 3 2 F and 3 2 R is recorded on magnetic tape 21 (first 1 2 Figure)
- the right channel and the left channel can be set correctly, and the audio signal can be recorded. A high sound field can be created correctly.
- this video tape recorder with a built-in camera 12 is one of the information (X) that accompanies audio data (Fig. 6).
- An identification code for the front and rear surround systems is set and recorded on the magnetic tape 21.
- the phase between audio signals is set correctly. This makes it possible to create a sound field that has a high sense of presence, even if you follow it. I'll be here and there. .
- the sasara rounded method according to the front-and-front only, the front-forward direction, and the rear-rear direction
- the voice and voice signals recorded in the Sasara Rounded method are processed correctly and processed 55 .. 11 It can be converted to the voice signal of the sound signal of the voice signal, and the sound field can be distorted by the high realistic sensation. This is where you can form a place. .
- a plurality of sound voice signal signals input / output by the input terminal terminals of the sound voice signal signals are input and output.
- the Chitaya 2200 channel settings are detected and detected according to the results of detection and detection.
- the signals are input from the multiple audio signal input terminals.
- the sound field can be formed with a high level of realism by appropriately processing the audio signal.
- FIG. 13 is a block diagram showing a camera-integrated video recorder 51 according to the second embodiment.
- this force-meller type video recorder 51 the same configuration as that of the camera-integrated video tape recorder 12 described above with reference to FIG. 5 is indicated by the corresponding reference numeral, and redundant description is omitted.
- the audio input unit 52 acquires the audio signal and outputs it by channel 2 or 5.1 channel fc, and the recording / playback unit 53 is controlled by the controller 55.
- the encoded data of the audio signal SA obtained from the audio input unit 52 and the video signal SV obtained from the imaging unit 15 is recorded on the optical disc 54.
- the recording / reproducing unit 53 reproduces the encoded data recorded on the optical disc 54 and outputs it to the decoder 22.
- the camera-integrated video recorder 51 takes an image of the sound signal according to the user's operation under the control of the controller 55. The result is recorded on the optical disc, and the recorded audio signal and imaging result are reproduced and output.
- FIG. 14 is a block diagram showing the configuration of the voice input unit 52.
- the audio input unit 52 receives the audio signal input via the audio jack 3 2 F and the audio signal from the built-in microphone 3 1 according to the setting of the audio input switch. Selectively output, or combine and output.
- the audio input unit 52 is controlled by the audio processor 5 6 under the control of the controller 55. Converts 4-channel audio signals input via 3 2 R into 5.1-channel audio signals and outputs them. In this process, the calculation process is switched according to the surround system of the 4-channel audio signal input via the audio jacks 3 2 F and 3 2 R, and the settings of the right and left channels. Generate a 1-channel audio signal. Therefore, the camera-integrated video recorder 5.1 uses the right channel and left channel described above for the first embodiment.
- the sound processing section 56 switches the computation processing between the front and rear surround methods and the front-only surround method by switching the computation processing in the sound processing unit 56, and the sound field is correctly and highly realistic. Form.
- the setting of the channel of the audio signal input from the plurality of audio signal input terminals is detected, and the signal processing is performed by switching the right channel and the left channel according to the detection result. Even if the right channel and the left channel of the audio signal are switched by switching the calculation processing of the audio signal, the same effect as in the first embodiment can be obtained.
- the setting detection means and the method detection means are formed by the method setting switch using the slide switch, and the setting of the right channel and the left channel is performed by the operation of the user of the method setting switch, and the surround method.
- the present invention is not limited to this, and the method setting switch may be formed by a pressing operation or the like.
- the menu is displayed on the monitor unit and the touch panel is operated. The setting of the right channel and the left channel and the surround system may be detected.
- the present invention is not limited to this, and the sound input by the plurality of microphones by the stereo method is processed. Can be widely applied to cases.
- the case where the audio signal is processed by the 5.1 channel has been described.
- the present invention is not limited to this.
- the case where the audio signal is processed by the 6.1 channel is widely used. Can be applied.
- the present invention relates to an audio signal processing device and an audio signal processing method, and can be applied to, for example, a camera-integrated video tape recorder.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Circuit For Audible Band Transducer (AREA)
- Television Signal Processing For Recording (AREA)
- Stereophonic Arrangements (AREA)
- Studio Devices (AREA)
- Stereophonic System (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/887,882 US20090175457A1 (en) | 2005-04-05 | 2006-03-31 | Audio Signal Processing Apparatus and Audio Signal Processing Method |
EP06731345A EP1868415A1 (en) | 2005-04-05 | 2006-03-31 | Sound signal processing device and sound signal processing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-108138 | 2005-04-05 | ||
JP2005108138A JP2006287824A (ja) | 2005-04-05 | 2005-04-05 | 音声信号処理装置及び音声信号処理方法 |
Publications (1)
Publication Number | Publication Date |
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WO2006107102A1 true WO2006107102A1 (ja) | 2006-10-12 |
Family
ID=37073635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/307397 WO2006107102A1 (ja) | 2005-04-05 | 2006-03-31 | 音声信号処理装置及び音声信号処理方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090175457A1 (ja) |
EP (1) | EP1868415A1 (ja) |
JP (1) | JP2006287824A (ja) |
KR (1) | KR20080005355A (ja) |
CN (1) | CN101138275A (ja) |
WO (1) | WO2006107102A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101330776B (zh) * | 2007-06-21 | 2012-02-29 | 上海风格信息技术有限公司 | 音频信号左右声道反相检测方法 |
US20220272253A1 (en) * | 2021-02-25 | 2022-08-25 | Canon Kabushiki Kaisha | Image capturing apparatus including plurality of sound input units, control method, and recording medium |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090252481A1 (en) * | 2008-04-07 | 2009-10-08 | Sony Ericsson Mobile Communications Ab | Methods, apparatus, system and computer program product for audio input at video recording |
KR101825567B1 (ko) * | 2011-08-31 | 2018-02-05 | 삼성전자 주식회사 | 단말장치의 마이크로폰 극성 제어장치 및 방법 |
CN110223677A (zh) | 2012-03-14 | 2019-09-10 | 诺基亚技术有限公司 | 空间音频信号滤波 |
CN105407443B (zh) * | 2015-10-29 | 2018-02-13 | 小米科技有限责任公司 | 录音方法及装置 |
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JPS6019269U (ja) * | 1983-07-15 | 1985-02-09 | オリンパス光学工業株式会社 | ビデオカメラ |
US5495534A (en) * | 1990-01-19 | 1996-02-27 | Sony Corporation | Audio signal reproducing apparatus |
US6697491B1 (en) * | 1996-07-19 | 2004-02-24 | Harman International Industries, Incorporated | 5-2-5 matrix encoder and decoder system |
JP3636057B2 (ja) * | 2000-10-13 | 2005-04-06 | ソニー株式会社 | 携帯型情報処理装置、携帯型情報処理装置における情報処理方法及び携帯型情報処理装置におけるプログラム格納媒体 |
-
2005
- 2005-04-05 JP JP2005108138A patent/JP2006287824A/ja not_active Abandoned
-
2006
- 2006-03-31 EP EP06731345A patent/EP1868415A1/en not_active Withdrawn
- 2006-03-31 CN CNA2006800075815A patent/CN101138275A/zh active Pending
- 2006-03-31 KR KR1020077020168A patent/KR20080005355A/ko not_active Application Discontinuation
- 2006-03-31 US US11/887,882 patent/US20090175457A1/en not_active Abandoned
- 2006-03-31 WO PCT/JP2006/307397 patent/WO2006107102A1/ja active Application Filing
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JPH05191887A (ja) * | 1992-01-16 | 1993-07-30 | Matsushita Electric Ind Co Ltd | サラウンドマイクロホンシステム |
JPH09312790A (ja) * | 1996-05-21 | 1997-12-02 | Sharp Corp | 音声記録制御装置 |
JPH11215588A (ja) * | 1998-01-23 | 1999-08-06 | Hitachi Ltd | 音声出力システム |
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CN101330776B (zh) * | 2007-06-21 | 2012-02-29 | 上海风格信息技术有限公司 | 音频信号左右声道反相检测方法 |
US20220272253A1 (en) * | 2021-02-25 | 2022-08-25 | Canon Kabushiki Kaisha | Image capturing apparatus including plurality of sound input units, control method, and recording medium |
US12022187B2 (en) * | 2021-02-25 | 2024-06-25 | Canon Kabushiki Kaisha | Image capturing apparatus including plurality of sound input units, control method, and recording medium |
Also Published As
Publication number | Publication date |
---|---|
KR20080005355A (ko) | 2008-01-11 |
EP1868415A1 (en) | 2007-12-19 |
CN101138275A (zh) | 2008-03-05 |
US20090175457A1 (en) | 2009-07-09 |
JP2006287824A (ja) | 2006-10-19 |
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