WO2020004027A1 - 情報処理装置、情報処理システム、プログラム及び情報処理方法 - Google Patents
情報処理装置、情報処理システム、プログラム及び情報処理方法 Download PDFInfo
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/167—Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/3053—Block-companding PCM systems
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/60—General implementation details not specific to a particular type of compression
- H03M7/6005—Decoder aspects
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/60—General implementation details not specific to a particular type of compression
- H03M7/6058—Saving memory space in the encoder or decoder
Definitions
- the present technology relates to an information processing apparatus, an information processing system, a program, and an information processing method for decoding compressed audio data.
- Some audio compression codecs have a large frame length, such as FLAC (Free Lossless Audio Codec).
- FLAC Free Lossless Audio Codec
- When decoding data compressed by such a compression codec having a large frame length it is necessary to ensure a large memory size for storing compressed data (Elementary stream) and a large memory for storing PCM (pulse code modulation).
- PCM pulse code modulation
- an object of the present technology is to provide an information processing apparatus, an information processing system, a program, and an information processing method capable of executing decoding without requiring a large memory resource.
- an information processing device includes a decoding unit.
- the decoding unit obtains the start position of each of the data of the plurality of channels included in each frame of the compressed audio data, and decodes the data of the plurality of channels for each block of a predetermined size from the start position.
- the decoding unit decodes the compressed audio data block by block, it is possible to suppress memory resources required for decoding.
- a compression codec such as FLAC
- the size of a frame is large, so that it is usually difficult to execute decoding in a device having a small memory resource.
- decoding can be executed even in a device having a small memory resource.
- Each frame of the compressed audio data includes data of the first channel and data of the second channel in order from the top of the frame
- the decoding unit decodes a first block from a start position in the first channel, decodes a second block from a start position in the second channel, and decodes the first block in the first channel. May be decoded from the end position of the second block, and the fourth block may be decoded from the end position of the second block in the second channel.
- the information processing apparatus may further include a parser unit that specifies the head position.
- the parser unit may decode the compressed audio data and specify the head position.
- Each frame of the compressed audio data includes data of the first channel and data of the second channel in order from the top of the frame
- the parser unit may decode the data of the first channel, and specify an end position of the data of the first channel as a head position of the data of the second channel.
- the parser unit may specify the head position from the meta information of the compressed audio data.
- the parser unit specifies the head position, generates meta information of the compressed audio data including the head position,
- the decoding unit may decode the data of the plurality of channels for each block of a predetermined size from the start position using the start position included in the meta information.
- the parser unit may generate compressed audio data including the meta information.
- the parser unit may generate a meta information file including the meta information.
- Information processing device may generate a meta information file including the meta information.
- the decoding unit may further include a rendering unit that renders audio data of the first block and the second block.
- an information processing system includes a first information processing device and a second information processing device.
- the first information processing apparatus obtains a start position of each of data of a plurality of channels included in each frame of compressed audio data, and decodes the data of the plurality of channels for each block of a predetermined size from the start position. And a decoding unit.
- the second information processing device includes a parser unit that specifies the head position.
- a program according to the present technology causes an information processing device to operate as a decoding unit.
- the decoding unit obtains the start position of each of the data of the plurality of channels included in each frame of the compressed audio data, and decodes the data of the plurality of channels for each block of a predetermined size from the start position.
- a decoding unit acquires a head position of each of data of a plurality of channels included in each frame of compressed audio data, and decodes the data of the plurality of channels. Decoding is performed for each block of a predetermined size from the head position.
- FIG. 9 is a schematic diagram illustrating a usage mode of a memory resource in a general decoding process. It is a schematic diagram which shows the decoding method of the compressed audio
- 1 is a block diagram illustrating a functional configuration of an information processing device according to a first embodiment of the present technology.
- FIG. 3 is a schematic diagram showing a channel head position in compressed audio data. It is a schematic diagram which shows the aspect of the decoding (identification of the channel head position) by the parser part with which the said information processing apparatus is provided.
- FIG. 3 is a schematic diagram illustrating a data structure of audio data generated by a decoding unit included in the information processing device. It is a schematic diagram which shows the order of the decoding by the decoding part with which the said information processing apparatus is equipped.
- FIG. 3 is a schematic diagram illustrating a data structure of audio data generated by a decoding unit included in the information processing device.
- FIG. 3 is a block diagram illustrating a hardware configuration of the information processing apparatus. It is a block diagram showing a functional configuration of an information processing device according to a second embodiment of the present technology. It is an example of a meta information file generated by a parser unit included in the information processing device. It is an example of a meta information embedding part of the compressed audio data with meta information generated by a parser unit included in the information processing apparatus.
- FIG. 1 is a schematic diagram showing a mode of using memory resources in a general decoding process.
- ES compressed audio data
- FLAC Free Lossless Audio Codec
- PCM pulse code modulation
- the decoding unit 301 reads the ES from the storage 302 and stores it in the ES buffer 1. Further, the decoding unit 301 decodes the compressed audio data in the ES buffer 1 and stores the PCM generated by the decoding in the PCM buffer 1.
- FIG. 2 is a schematic diagram showing the data structure of the ES data of the stereo sound.
- the ES includes a stream header (Stream @ Header), a frame header (Frame @ Header), left channel data (Left @ Date), and right channel data (Right @ Date).
- the ES is composed of a plurality of frames F, and each frame F includes a frame header, left channel data, and right channel data.
- the decoding unit 301 stores the ES for one frame in the ES buffer 1 and performs decoding. Further, during decoding, it is necessary to read the ES of the next frame from the storage 302, and the read ES is stored in the ES buffer 2.
- FIG. 3 is a schematic diagram showing the data structure of PCM. As shown in the figure, one frame F includes left channel data (Left @ Date) and right channel data (Right @ Date).
- the rendering unit 303 renders the PCM to generate an audio signal and causes the speaker 304 to generate a sound.
- the decoding unit 301 decodes the ES of the next frame into PCM and stores it in the PCM buffer 1.
- At least four memory buffers of the ES buffer 1, the ES buffer 2, the PCM buffer 1, and the PCM buffer 2 are required at the same time.
- the size of one frame is large and the required amount of memory buffer is also large. For example, when the size of one frame is about 500 KB, about 2 MB is required for four memory buffers. It is difficult to secure such a memory buffer in a device having limited memory resources such as IoT (Internet of Things) and M2M (Machine to Machine).
- IoT Internet of Things
- M2M Machine to Machine
- sampling is performed at the sampling frequency of the frame time. After being converted into a set of frequency-domain features, the data is compressed based on a human auditory model algorithm or the like.
- the audio compression format is usually premised on decoding in frame units. For this reason, even if an attempt is made to execute the divided decoding, the leading position of the right channel data (Right ⁇ Date in FIG. 2) ⁇ is not known, and the divided decoding cannot be executed. According to the present technology, as described below, the leading position of the right channel data is specified to enable the execution of the divided decoding.
- FIG. 4 is a block diagram illustrating a functional configuration of the information processing apparatus 100 according to the present embodiment.
- the information processing apparatus 100 includes a storage 101, a parser unit 102, a decoding unit 103, a rendering unit 104, and an output unit 105.
- the storage 101 and the output unit 105 may be provided separately from the information processing apparatus 100 and connected to the information processing apparatus 100.
- the storage 101 is a storage device such as an embedded Multi Media Card (eMMC) or an SD card, and stores compressed audio data D to be decoded by the information processing device 100.
- the compressed audio data D is audio data compressed by a compression codec such as FLAC.
- the codec that can be decoded by the technique of the present technology is not limited to FLAC, and is a compression codec that does not perform sampling at the sampling frequency or a compression codec that performs sampling at the sampling frequency, but the audio data unit to be sampled is smaller than the frame size. .
- Vorbis can be decoded by the technique of the present technology.
- the parser unit 102 acquires the compressed audio data D from the storage 101 and analyzes the syntax described in the stream header and the frame header.
- the parser unit 102 supplies Syntax information, which is a result of the syntax analysis, to the decoding unit 103.
- the parser unit 102 specifies a head position (hereinafter, a channel head position) of each channel included in each frame of the compressed audio data D.
- FIG. 5 is a schematic diagram showing a channel head position in the compressed audio data D. Parser 102, as shown in the figure, the left channel data (Left a Date: hereinafter, D L) head position of S L and right channel data (Right a Date: hereinafter, D R) specifying the beginning position S R of the .
- the parser 102 may be the end position of the frame header and the start position S L.
- the start position S R because it is located behind the left channel data D L, it is impossible to identify the start position S R as it is.
- parser 102 can identify the head position S R by the decode.
- FIG. 6 is a schematic diagram illustrating a mode of decoding by the parser unit 102. As indicated by the white arrows in the drawing, the parser unit 102 performs decoding from the head of the left channel data D L.
- parser unit 102 When parser unit 102 completes the decoding of the left channel data D L, since the head position S R of the right channel data D R is found, the parser 102 can identify the head position S R.
- parser 102 may be decoded only the left-channel data D L. Note that the data generated by this decoding is not used and is therefore deleted. Therefore, no memory resources are required in this process.
- the parser unit 102 supplies the channel head position to the decoding unit 103 together with the Syntax information.
- the decoding unit 103 decodes the compressed audio data using the channel head position and the Syntax information.
- FIG. 7 is a schematic diagram showing a mode of decoding by the decoding unit 103. As shown in the figure, the decoding unit 103, a block B L1 is a block from the head position S L of a predetermined size in the left-channel data D L read from the storage 101, decode.
- the size of the block BL1 is not particularly limited, and is preferably a size that allows the information processing apparatus 100 to use the maximum available memory resources. Typically, the size of the block B L1 is about 3-10% of the size of the left channel data D L.
- a block B R1 from the head position S R is a block of a predetermined size in the right-channel data D R read from the storage 101, decode.
- the size of the block B R1 is the same level as the block B L1, may be about 3-10% of the size of the right channel data D R.
- FIG. 8 is a schematic diagram illustrating a data structure of audio data (PCM) generated by the decoding unit 103.
- the audio data P R1 is a result of decoding the audio data P L1
- the block B R1 is a result of decoding the block B L1 is generated.
- the rendering unit 104 renders interleaves the audio data P L1 and audio data P R1, and supplies the generated audio signal to the output unit 105.
- the output unit 105 supplies an audio signal to an output device such as a speaker and causes the output device to generate a sound.
- Audio data P L1 and the audio data P R1 is generated from the block B L1 and block B R1, small relative to one frame of speech data generated from the left channel data D L and right channel data D R Size (See FIGS. 3 and 8).
- the decoding unit 103 decodes the left-channel data D L and right channel data D R for each block, the rendering unit 104 renders the generated voice data.
- FIG. 9 is a schematic diagram showing the order of decoding by the decoding unit 103 of the decoding unit 103
- FIG. 10 is a schematic diagram showing the data structure of audio data (PCM) generated by the decoding unit 103.
- PCM audio data
- the decoding section 103 decoded in block B R1, decodes from the end position of the block B L1 reads the block B L2 of a predetermined size, generates audio data P L2. Subsequently, a block BR2 of a predetermined size is read from the end position of the block BR1, and is decoded to generate audio data PR2 .
- the rendering unit 104 When the audio data PL2 and the audio data PR2 are generated, the rendering unit 104 performs interleaving and rendering, and supplies the generated audio signal to the output unit 105.
- the rendering unit 104 sequentially renders audio data.
- the information processing apparatus 100 performs decoding by the same processing for the subsequent frames. That is, the parser 102 identifies the head position S L and the top position S R for each frame of compressed audio data D, the decoding unit 103 performs decoding for each block. The rendering unit 104 renders the audio data generated for each block to generate sound.
- the decoding unit 103 can decode the compressed audio data D for each block. As a result, the rendering unit 104 has a small size. Audio data can be output.
- the data size stored in each of the ES buffers 1 and 2 and the PCM buffers 1 and 2 is about two blocks (two left and right channels) and is decoded for each frame (FIG. 2). And FIG. 3). For this reason, it is possible to reduce the amount of memory resources required for decoding.
- the parser unit is also used in normal decoding processing, the decoding processing according to the present technology can be realized without requiring a special processing engine.
- the compressed audio data D is stored in the storage 101.
- the compressed audio data D is stored on another information processing device or a network, and the parser unit 102 and the decoding unit 103 communicate with the compressed audio data D by communication. May be obtained.
- the parser 102 can identify the head position S l of the left channel data D L by the decoding.
- the compressed audio data is not limited to two channels on the left and right, but may be multi-channels such as 5.1 channels and eight channels. Even in this case, the parser unit 102 specifies a channel head position for each channel, so that the decoding unit 103 can execute decoding for each block.
- the parser unit 102 specifies the channel head position by decoding, but if the compressed audio data D contains information indicating the channel head position in advance, decoding is not performed by using this information. It is also possible to specify the channel start position at the same time.
- FIG. 11 is a schematic diagram illustrating a hardware configuration of the information processing apparatus 100.
- the information processing apparatus 100 has a CPU 1001, a memory 1002, a storage 1003, and an input / output unit (I / O) 1004 as a hardware configuration. These are connected to each other by a bus 1005.
- a CPU (Central Processing Unit) 1001 controls other components according to a program stored in the memory 1002, performs data processing according to the program, and stores a processing result in the memory 1002.
- CPU 1001 can be a microprocessor.
- the memory 1002 stores programs and data executed by the CPU 1001.
- the memory 1002 can be a RAM (Random Access Memory).
- the storage 1003 stores programs and data.
- the storage 1003 may be a hard disk drive (HDD) or a solid state drive (SSD).
- the input / output unit 1004 receives an input to the information processing device 100 and supplies an output of the information processing device 100 to the outside.
- the input / output unit 1004 includes input devices such as a touch panel and a keyboard, output devices such as a display, and a connection interface such as a network.
- the hardware configuration of the information processing apparatus 100 is not limited to the one shown here, and may be any as long as the functional configuration of the information processing apparatus 100 can be realized. Further, a part or all of the hardware configuration may exist on a network.
- FIG. 12 is a block diagram showing a functional configuration of the information processing apparatus 200 according to the present embodiment.
- the information processing device 200 includes a storage 201, a parser unit 202, a decoding unit 203, a rendering unit 204, and an output unit 205.
- the storage 201 and the output unit 205 may be provided separately from the information processing device 200 and connected to the information processing device 200. Also, the parser unit 202 may be provided in an information processing device different from the information processing device 200 and connected to the storage 201.
- the storage 201 is a storage device such as an eMMC or an SD card, and stores the compressed audio data D to be decoded by the information processing device 200.
- the compressed audio data D is audio data compressed by a compression codec such as FLAC as described above.
- the codec that can be decoded by the information processing apparatus 200 is not limited to FLAC, and is a compression codec that does not perform sampling at the sampling frequency or performs sampling at the sampling frequency. A smaller compression codec.
- the storage 201 stores the compressed audio data E with meta information.
- the compressed audio data E with meta information is the compressed audio data D to which meta information has been added, and will be described later in detail.
- the parser unit 202 acquires the compressed audio data D from the storage 201, analyzes the syntax described in the stream header and the frame header, and generates Syntax information.
- the parser unit 202 specifies the head position (channel head position) of each channel included in each frame of the compressed audio data D.
- Channel head position include the start position of S L and the right-channel data D R of the left channel data D L S R (see FIG. 5).
- the parser 202 may be the end position of the frame header and the start position S L. Further, parser 202, as in the first embodiment perform the decoding from the head of the left channel data D L (see FIG. 6) can acquire the start position S R.
- the parser unit 202 generates the compressed audio data E with meta information by adding the meta information including the head position of the channel and the Syntax information to the compressed audio data D, and stores the compressed audio data E with meta information in the storage 201.
- the meta information includes at least the head position of each channel for each frame.
- the generation of the compressed audio data E with meta information by the parser unit 202 can be executed at an arbitrary timing before the decoding unit 203 executes the decoding.
- the decoding unit 203 decodes the compressed audio data using the channel head position and the Syntax information.
- the decoding unit 203 can read the compressed audio data E with meta information from the storage 201 and acquire the channel head position included in the compressed audio data E with meta information.
- the decoding unit 203 decodes the compressed audio data D using the channel head position as in the first embodiment. That is, the decoding unit 203 reads out the block B L1 from the head position S L which is part of the left channel data D L decodes reads the block B R1 is part of the head position S R of the right channel data D R Decoding (see FIG. 7).
- the audio data P R1 is a result of decoding the audio data P L1 and locking B R1 is a result of decoding the block B L1 is generated (see FIG. 8).
- Rendering unit 204 renders interleaves the audio data P L1 and audio data P R1, and supplies the generated audio signal to the output unit 205.
- the output unit 205 supplies a sound signal to an output device such as a speaker, and causes the output device to sound.
- the decoding unit 203 the first embodiment as well as left-channel data D L and right channel data D R reads each block decoded, the rendering unit 204 renders the generated audio data (FIG. 9).
- the information processing apparatus 200 performs decoding by the same processing for the subsequent frames. That is, the decoding unit 203 acquires the channel head position of each frame from the compressed audio data E with meta information, and decodes the compressed audio data D for each block. The rendering unit 204 renders the sound data generated for each block to generate sound.
- the decoding unit 203 can decode the compressed audio data D for each block. As a result, the rendering unit 204 has a small size. Audio data can be output.
- the data size stored in each of the ES buffers 1 and 2 and the PCM buffers 1 and 2 is approximately two blocks (two channels on the left and right), and is decoded for each frame (FIG. 2). And FIG. 3). For this reason, it is possible to reduce the amount of memory resources required for decoding.
- decoding can be executed without the need for the synchronous operation of the parser unit 202 and the decoding unit 203. For this reason, it is possible to reduce the influence of the fluctuation of the processing amount between the parser unit 202 and the decoding unit 203.
- parser unit 202 can perform parsing processing (syntax analysis and specification of a channel head position) in advance before receiving an actual decoding request, there is no need to perform parsing processing during actual decoding. It is also possible to reduce the processor power and the access load to the storage at the same time.
- the parsing process can be performed by the edge terminal by creating the meta information not by the edge terminal such as a wearable terminal or an IoT device but by, for example, a PC, a server, and a cloud. Without performing the decoding, it is possible to realize the decoding according to the present embodiment.
- the meta information in the compressed audio data it is possible to select the decoding by the method of the present embodiment and the normal decoding by the audio reproduction terminal, and the compressed audio data is independent of the reproduction environment. Data can be reproduced.
- the parser unit 202 may generate a meta information file that does not include the compressed audio data, instead of generating the compressed audio data E with meta information.
- FIG. 13 shows an example of a meta information file.
- the meta information file can be a file storing stream information and size information for each channel data of each frame.
- the decoding unit 203 can execute decoding for each block from the channel head position with reference to the meta information.
- the parser unit 202 can also store meta information in a database (playlist data or the like) held by a music generator or the like.
- the compressed audio data D and the compressed audio data E with meta information are stored in the storage 201.
- these data are stored on another information processing device or a network, and the parser unit 202 and the The decoding unit 203 may acquire these data by communication.
- the parser 202 may obtain the head position S L of the left-channel data D L by the decoding.
- the compressed audio data is not limited to two channels on the left and right, but may be multi-channels such as 5.1 channels and eight channels. Even in this case, the parser unit 202 specifies the channel head position for each channel, so that the decoding unit 203 can execute decoding for each block.
- FIG. 14 is an example of the syntax of the compressed audio data by FLAC.
- a new META DATA BLOCK header type is provided in the META DATA BLOCK (for example, used as CHANNEL_SIZE in BLOCK TYPE 7), and by writing the data format of the channel information shown in FIG.
- the compressed audio data E with information can be realized.
- the above-described functional configuration of the information processing apparatus 200 can be realized by cooperation of hardware and a program.
- the hardware configuration of the information processing device 200 can be the same as the hardware configuration according to the first embodiment (see FIG. 11).
- the parser unit 202 may be realized by an information processing device different from the information processing device in which the decoding unit 203 and the rendering unit 204 are mounted, that is, configured by a plurality of information processing devices.
- This embodiment may be implemented by an information processing system.
- the present technology can have the following configurations.
- An information processing apparatus comprising: a decoding unit that obtains a start position of each of data of a plurality of channels included in each frame of compressed audio data and decodes the data of the plurality of channels for each block of a predetermined size from the start position. .
- Each frame of the compressed audio data includes data of the first channel and data of the second channel in order from the top of the frame
- the decoding unit decodes a first block from a head position in the first channel, decodes a second block from a head position in the second channel, and decodes the first block in the first channel.
- An information processing device that decodes a third block from the end position of the second block and decodes a fourth block from the end position of the second block in the second channel.
- An information processing apparatus further comprising a parser unit for specifying the head position.
- Each frame of the compressed audio data includes data of the first channel and data of the second channel in order from the top of the frame,
- the information processing apparatus wherein the parser unit decodes the data of the first channel, and specifies an end position of the data of the first channel as a head position of the data of the second channel.
- the parser unit specifies the head position, generates meta information of the compressed audio data including the head position, The information processing device, wherein the decoding unit decodes the data of the plurality of channels for each block of a predetermined size from the start position using the start position included in the meta information.
- An information processing apparatus further comprising: a rendering unit that renders audio data of the first block and the second block when the first block and the second block are decoded by the decoding unit.
- First information including a decoding unit that obtains a start position of each of a plurality of channels of data included in each frame of the compressed audio data and decodes the plurality of channels of data from the start position for each block of a predetermined size.
- a second information processing apparatus including a parser unit for specifying the head position.
- the information processing device operates as a decoding unit that obtains the start position of each of the data of the plurality of channels included in each frame of the compressed audio data and decodes the data of the plurality of channels for each block of a predetermined size from the start position. Program to let.
- a decoding unit obtains respective head positions of data of a plurality of channels included in each frame of compressed audio data, and decodes the data of the plurality of channels for each block of a predetermined size from the head position.
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Abstract
Description
上記デコード部は、圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、上記複数のチャンネルのデータを上記先頭位置から所定サイズのブロック毎にデコードする。
上記デコード部は、上記第1のチャンネルにおいて先頭位置から第1のブロックをデコードし、上記第2のチャンネルにおいて先頭位置から第2のブロックをデコードし、上記第1のチャンネルにおいて上記第1のブロックの終端位置から第3のブロックをデコードし、上記第2のチャンネルにおいて上記第2のブロックの終端位置から第4のブロックをデコードしてもよい。
上記パーサ部は、上記第1のチャンネルのデータをデコードし、上記第1のチャンネルのデータの終端位置を上記第2のチャンネルのデータの先頭位置として特定してもよい。
上記デコード部は、上記メタ情報に含まれる上記先頭位置を用いて上記複数のチャンネルのデータを上記先頭位置から所定サイズのブロック毎にデコードしてもよい。
情報処理装置。
上記デコード部によって上記第1のブロックと上記第2のブロックがデコードされると、上記第1のブロックと上記第2のブロックの音声データをレンダリングするレンダリング部をさらに具備してもよい。
上記第1の情報処理装置は、圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、上記複数のチャンネルのデータを上記先頭位置から所定サイズのブロック毎にデコードするデコード部を備える。
上記第2の情報処理装置は、上記先頭位置を特定するパーサ部を備える。
上記デコード部は、圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、上記複数のチャンネルのデータを上記先頭位置から所定サイズのブロック毎にデコードする。
本技術の実施形態について説明する前に、圧縮音声データの一般的なデコード処理でのメモリリソースの使用態様について説明する。
上記のようにフレーム単位でデコードを実行する場合、大きなメモリリソースが必要となる。ここで、フレーム単位以下でのデコード(分割デコード)を実行することができれば、デコードに要するメモリリソースを抑制することが可能である。
本技術の第1の実施形態に係る情報処理装置について説明する。
上記説明では、ストレージ101に圧縮音声データDが格納されているとしたが、圧縮音声データDは別の情報処理装置やネットワーク上に格納され、パーサ部102及びデコード部103は通信によって圧縮音声データを取得してもよい。
上述した情報処理装置100の機能的構成は、ハードウェアとプログラムの協働によって実現することが可能である。
本技術の第2の実施形態に係る情報処理装置について説明する。
パーサ部202は、パース処理を実行した際、メタ情報付き圧縮音声データEを生成する代わりに、圧縮音声データを含まないメタ情報ファイルを生成してもよい。
図14は、FLACによる圧縮音声データのSyntaxの例である。同図に示すようMETA DATA BLOCK内にMETA DATA BLOCKヘッダのタイプを新設し(例えばBLOCK TYPE7でCHANNEL_SIZEとして使用等)、このMETA DATA BLOCKの実態に図13示すチャンネル情報のデータフォーマットを書き込むことでメタ情報付き圧縮音声データEを実現することができる。
上述した情報処理装置200の機能的構成は、ハードウェアとプログラムの協働によって実現することが可能である。情報処理装置200のハードウェア構成は、第1の実施形態に係るハードウェア構成(図11参照)と同様とすることができる。
圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、上記複数のチャンネルのデータを上記先頭位置から所定サイズのブロック毎にデコードするデコード部
を具備する情報処理装置。
上記(1)に記載の情報処理装置であって、
上記圧縮音声データの各フレームには、フレーム先頭から順に第1のチャンネルのデータと第2のチャンネルのデータが含まれ、
上記デコード部は、上記第1のチャンネルにおいて先頭位置から第1のブロックをデコードし、上記第2のチャンネルにおいて先頭位置から第2のブロックをデコードし、上記第1のチャンネルにおいて上記第1のブロックの終端位置から第3のブロックをデコードし、上記第2のチャンネルにおいて上記第2のブロックの終端位置から第4のブロックをデコードする
情報処理装置。
上記(1)又は(2)に記載の情報処理装置であって、
上記先頭位置を特定するパーサ部
をさらに具備する情報処理装置。
上記(3)に記載の情報処理装置であって、
上記パーサ部は、上記圧縮音声データをデコードし、上記先頭位置を特定する
情報処理装置。
上記(4)に記載の情報処理装置であって、
上記圧縮音声データの各フレームには、フレーム先頭から順に第1のチャンネルのデータと第2のチャンネルのデータが含まれ、
上記パーサ部は、上記第1のチャンネルのデータをデコードし、上記第1のチャンネルのデータの終端位置を上記第2のチャンネルのデータの先頭位置として特定する
情報処理装置。
上記(3)に記載の情報処理装置であって、
上記パーサ部は、上記圧縮音声データのメタ情報から上記先頭位置を特定する
情報処理装置。
上記(4)又は(5)に記載の情報処理装置であって、
上記パーサ部は、上記先頭位置を特定し、上記先頭位置を含む上記圧縮音声データのメタ情報を生成し、
上記デコード部は、上記メタ情報に含まれる上記先頭位置を用いて上記複数のチャンネルのデータを上記先頭位置から所定サイズのブロック毎にデコードする
情報処理装置。
上記(7)に記載の情報処理装置であって、
上記パーサ部は、上記メタ情報を含む圧縮音声データを生成する
情報処理装置。
上記(7)に記載の情報処理装置であって、
上記パーサ部は、上記メタ情報を含むメタ情報ファイルを生成する
情報処理装置。
上記(2)から(9)のうちいずれか一つに記載の情報処理装置であって、
上記デコード部によって上記第1のブロックと上記第2のブロックがデコードされると、上記第1のブロックと上記第2のブロックの音声データをレンダリングするレンダリング部
をさらに具備する情報処理装置
圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、上記複数のチャンネルのデータを上記先頭位置から所定サイズのブロック毎にデコードするデコード部を備える第1の情報処理装置と、
上記先頭位置を特定するパーサ部を備える第2の情報処理装置と
を具備する情報処理システム。
圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、上記複数のチャンネルのデータを上記先頭位置から所定サイズのブロック毎にデコードするデコード部
として情報処理装置を動作させるプログラム。
デコード部が、圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、上記複数のチャンネルのデータを上記先頭位置から所定サイズのブロック毎にデコードする
情報処理方法。
101…ストレージ
102…パーサ部
103…デコード部
104…レンダリング部
105…出力部
200…情報処理装置
201…ストレージ
202…パーサ部
203…デコード部
204…レンダリング部
205…出力部
Claims (13)
- 圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、前記複数のチャンネルのデータを前記先頭位置から所定サイズのブロック毎にデコードするデコード部
を具備する情報処理装置。 - 請求項1に記載の情報処理装置であって、
前記圧縮音声データの各フレームには、フレーム先頭から順に第1のチャンネルのデータと第2のチャンネルのデータが含まれ、
前記デコード部は、前記第1のチャンネルにおいて先頭位置から第1のブロックをデコードし、前記第2のチャンネルにおいて先頭位置から第2のブロックをデコードし、前記第1のチャンネルにおいて前記第1のブロックの終端位置から第3のブロックをデコードし、前記第2のチャンネルにおいて前記第2のブロックの終端位置から第4のブロックをデコードする
情報処理装置。 - 請求項1に記載の情報処理装置であって、
前記先頭位置を特定するパーサ部
をさらに具備する情報処理装置。 - 請求項3に記載の情報処理装置であって、
前記パーサ部は、前記圧縮音声データをデコードし、前記先頭位置を特定する
情報処理装置。 - 請求項4に記載の情報処理装置であって、
前記圧縮音声データの各フレームには、フレーム先頭から順に第1のチャンネルのデータと第2のチャンネルのデータが含まれ、
前記パーサ部は、前記第1のチャンネルのデータをデコードし、前記第1のチャンネルのデータの終端位置を前記第2のチャンネルのデータの先頭位置として特定する
情報処理装置。 - 請求項3に記載の情報処理装置であって、
前記パーサ部は、前記圧縮音声データのメタ情報から前記先頭位置を特定する
情報処理装置。 - 請求項4に記載の情報処理装置であって、
前記パーサ部は、前記先頭位置を特定し、前記先頭位置を含む前記圧縮音声データのメタ情報を生成し、
前記デコード部は、前記メタ情報に含まれる前記先頭位置を用いて前記複数のチャンネルのデータを前記先頭位置から所定サイズのブロック毎にデコードする
情報処理装置。 - 請求項7に記載の情報処理装置であって、
前記パーサ部は、前記メタ情報を含む圧縮音声データを生成する
情報処理装置。 - 請求項7に記載の情報処理装置であって、
前記パーサ部は、前記メタ情報を含むメタ情報ファイルを生成する
情報処理装置。 - 請求項2に記載の情報処理装置であって、
前記デコード部によって前記第1のブロックと前記第2のブロックがデコードされると、前記第1のブロックと前記第2のブロックの音声データをレンダリングするレンダリング部
をさらに具備する情報処理装置 - 圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、前記複数のチャンネルのデータを前記先頭位置から所定サイズのブロック毎にデコードするデコード部を備える第1の情報処理装置と、
前記先頭位置を特定するパーサ部を備える第2の情報処理装置と
を具備する情報処理システム。 - 圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、前記複数のチャンネルのデータを前記先頭位置から所定サイズのブロック毎にデコードするデコード部
として情報処理装置を動作させるプログラム。 - デコード部が、圧縮音声データの各フレームに含まれる複数のチャンネルのデータのそれぞれの先頭位置を取得し、前記複数のチャンネルのデータを前記先頭位置から所定サイズのブロック毎にデコードする
情報処理方法。
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| US17/058,763 US20210210107A1 (en) | 2018-06-25 | 2019-06-12 | Information processing apparatus, information processing system, program, and information processing method |
| KR1020207035312A KR20210021968A (ko) | 2018-06-25 | 2019-06-12 | 정보 처리 장치, 정보 처리 시스템, 프로그램 및 정보 처리 방법 |
| CN201980040819.1A CN112400280A (zh) | 2018-06-25 | 2019-06-12 | 信息处理装置、信息处理系统、程序和信息处理方法 |
| JP2020527375A JP7247184B2 (ja) | 2018-06-25 | 2019-06-12 | 情報処理装置、情報処理システム、プログラム及び情報処理方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009500681A (ja) * | 2005-07-11 | 2009-01-08 | エルジー エレクトロニクス インコーポレイティド | オーディオ信号のエンコーディング及びデコーディング装置及び方法 |
| JP2009134115A (ja) * | 2007-11-30 | 2009-06-18 | Oki Semiconductor Co Ltd | デコーダ |
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| US6108584A (en) * | 1997-07-09 | 2000-08-22 | Sony Corporation | Multichannel digital audio decoding method and apparatus |
| US7168031B2 (en) * | 2000-04-14 | 2007-01-23 | Siemens Aktiengesellschaft | Method for channel decoding a data stream containing useful data and redundant data, device for channel decoding, computer-readable storage medium and computer program element |
| US8145974B2 (en) * | 2008-02-02 | 2012-03-27 | Broadcom Corporation | Virtual limited buffer modification for rate matching |
| US9998890B2 (en) * | 2010-07-29 | 2018-06-12 | Paul Marko | Method and apparatus for content navigation in digital broadcast radio |
| CN105376613B (zh) * | 2015-12-10 | 2019-05-10 | 华为技术有限公司 | 一种快速频道切换方法、服务器及iptv系统 |
| JP7209456B2 (ja) * | 2016-08-08 | 2023-01-20 | ソニーグループ株式会社 | 基地局装置、端末装置、通信方法、及びプログラム |
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| JP2009500681A (ja) * | 2005-07-11 | 2009-01-08 | エルジー エレクトロニクス インコーポレイティド | オーディオ信号のエンコーディング及びデコーディング装置及び方法 |
| JP2009134115A (ja) * | 2007-11-30 | 2009-06-18 | Oki Semiconductor Co Ltd | デコーダ |
Non-Patent Citations (1)
| Title |
|---|
| ZHU, F. ET AL.: "Design and research on free lossless audio decoding systems under the embedded development platform of ARM9", 2009 SECOND INTERNATIONAL SYMPOSIUM ON INFORMATION SCIENCE AND ENGINEERING, 26 December 2009 (2009-12-26), pages 223 - 226, XP031657463, Retrieved from the Internet <URL:https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5447174> * |
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| US20210210107A1 (en) | 2021-07-08 |
| DE112019003220T5 (de) | 2021-04-08 |
| JP7247184B2 (ja) | 2023-03-28 |
| JPWO2020004027A1 (ja) | 2021-08-05 |
| CN112400280A (zh) | 2021-02-23 |
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