EP1920439A1 - Creation d'un signal audio code et traitement d'un signal audio - Google Patents

Creation d'un signal audio code et traitement d'un signal audio

Info

Publication number
EP1920439A1
EP1920439A1 EP06769319A EP06769319A EP1920439A1 EP 1920439 A1 EP1920439 A1 EP 1920439A1 EP 06769319 A EP06769319 A EP 06769319A EP 06769319 A EP06769319 A EP 06769319A EP 1920439 A1 EP1920439 A1 EP 1920439A1
Authority
EP
European Patent Office
Prior art keywords
channel
division
configuration information
arbitrary
node
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP06769319A
Other languages
German (de)
English (en)
Other versions
EP1920439A4 (fr
Inventor
Hyeon O 306-403 Gangseon Maeul 3-danji Hanshin OH
Hee Suk Pang
Dong Soo 502 Woorim Villa KIM
Jae Hyun 609 Parkvill Officetel LIM
Hyo Jin Kim
Yang Won 2-803 Yeoksam Hanshin Apt. JUNG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020060004048A external-priority patent/KR20070031212A/ko
Priority claimed from KR1020060017659A external-priority patent/KR20070014936A/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1920439A1 publication Critical patent/EP1920439A1/fr
Publication of EP1920439A4 publication Critical patent/EP1920439A4/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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

Definitions

  • the present invention relates to a multi-channel coding method, and more particularly to a method for generating an encoded audio signal and a method for processing the audio signal.
  • signals may be configured in various ways (e.g., a block, a band, and a channel.).
  • the above- mentioned signals can be processed without being 'divided into several units within in a stationary period in which signals can maintain predetermined statistical characteristics because it is an advantage to compress the signals.
  • the signal is preferable for the signal to be divisionally processed in a transient period in which signal characteristics are abruptly changed, because of the prevention of signal distortion.
  • the present invention is directed to a method for signaling division information that substantially obviates one or more problems due to limitations and disadvantages of the related art.
  • An object of the present invention devised to solve the problem lies on a method for effectively signaling divided signals.
  • the object of the present invention can be achieved by providing a method for generating an encoded audio signal comprising: including basic configuration information requisite for a multi-channel audio coding process; and including extension configuration information, wherein the extension configuration information includes configuration information of extension environment which is identified by a type identifier (ID).
  • ID type identifier
  • FIG. 1 is a conceptual diagram illustrating a signaling method for block division information according to an embodiment of the present invention
  • FIG. 2 and FIG. 3 are conceptual diagram illustrating a signaling method for band and channel division information according to an embodiment of the present invention
  • FIG. 4 is a conceptual diagram illustrating a method for creating a multi-channel signal according to another embodiment of the present invention.
  • FIG. 5 is a conceptual diagram illustrating a signaling method for channel division information according to another embodiment of the present invention.
  • a signaling method for division information (also called “splitting information") according to the present invention will hereinafter be described with reference to the annexed drawings .
  • the signaling method for the division information according to the present invention is classified according to signal categories.
  • the above-mentioned signal is configured in various ways, for example, a block, a band, and a .channel.
  • the above-mentioned “Signaling method” may include the meaning of “Signaling” or the meaning of “Recognition of the signaled signal”.
  • Node is a point indicating whether the signal is divided or not.
  • spatial Information is information capable of downmixing or upmixing a multi-channel signal. It should be noted that the spatial information is indicative of spatial parameters, however, it is not limited to the above-mentioned examples, and can be applied to other examples as necessary.
  • the above-mentioned spatial parameters are a Channel Level Difference (CLD) indicating a difference in energy between two channels, Inter-Channel Coherences (ICC) indicating correlation between two channels, and Channel Prediction Coefficients (CPC) used for creating three channels from two channels.
  • CLD Channel Level Difference
  • ICC Inter-Channel Coherences
  • CPC Channel Prediction Coefficients
  • Block Division A block processing is required to compress consecutive data of a time domain in the same manner as in audio signals.
  • Block Processing indicates that an input signal is divisionally processed at intervals of a predetermined distance.
  • the above-mentioned interval is defined as a block, and one or more blocks are combined to configure a frame.
  • the above-mentioned frame is indicative of a unit for transmitting/storing data.
  • Block Division or “Block Splitting” is indicative of a specific process in which an input signal is changed to different-sized blocks during the signal processing .
  • Block Size Information is specific information indicating a block size acquired when the input signal is processed while being changed to different-sized blocks.
  • the signal processing is performed using a long block or a short block.
  • the signal has various characteristics for every interval, such that it is difficult to conclusively determine that all the signals can be processed according to the long-block signal processing scheme and the short- block signal processing scheme.
  • a specific-sized block is selected from among different-sized blocks suitable for signal characteristics within a specific interval, and the block division is then performed on the selected block.
  • blocks are configured to have two or more different sizes.
  • a predetermined-sized block from among the two or more different-sized blocks can be selected from the frame in various ways .
  • the above-mentioned signaling method is classified into a sequential signaling method and a hierarchical signaling method.
  • the sequential signaling method pre-defines the frame size (i.e., length denoted by "N"), and performs the signaling process using the number of minimum-sized blocks M.
  • the frame length "N" is a multiple of a specific M.
  • the hierarchical signaling method may be classified into a method for transmitting layer' s depth information and a method for not transmitting the layer' s depth information and a detailed description thereof will hereinafter be described with reference to the annexed drawings .
  • FIG. 1 is a conceptual diagram illustrating a signaling method for block division information according to an embodiment of the present invention.
  • each layer is denoted by a layer, and the depth of the layer is set to "5".
  • a “Layer 1" includes a first block 210, which is the longest block used as a basic unit for block division, and the length of the first block 210 is N.
  • Reference numbers (1), (2), ..., (a), (b) , (c) , and (d) indicate exemplary binary signaling sequences.
  • the block division information indicating whether the block is divided or not is represented by a division ID (identifier) and a non-division ID.
  • a specific number "1" is used as the division ID, and a specific number "0" is used as the non-division ID.
  • the above-mentioned division ID and the non-division ID are represented in nodes for each layer.
  • the division ID indicates that a predetermined block contained in an upper layer is divided into equal halves in a lower layer, and also indicates that a lower node is assigned to the lower layer.
  • the non-division ID indicates that a predetermined block of the upper layer is not divided by the lower layer, and also indicates that any lower node corresponding to a node which is represented by the non- division ID is not assigned to the lower layer.
  • To un- assign the lower node means that there is no performing additional signaling operations.
  • the block division information (1) of the first block 210 has the value of 1 in the uppermost layer (i.e., the Layer 1), the block division of the first block 210 is performed.
  • Layer 2 acting as the lower layer of the Layer 1 includes two blocks 220 and 221, each of which has the length of N/2.
  • Block division information (2) of the block 220 contained in the Layer 2 has the value of "1”
  • block division information (3) of the block 221 has the value of "1”
  • Layer 3 acting as a lower layer of the Layer 2 includes four blocks 230, 231, 232, and 233, each of which has the length of N/4.
  • the block division information (4) associated with the block 230 contained in the Layer 3 has the value of "0”.
  • the block division information (5) associated with the block 231 3 has the value of "1”.
  • the block division information (6) associated with the block 232 has the value of "1”.
  • the block division information (7) associated with the block 233 contained in the Layer 3 has the value of "0".
  • the block division is not performed on the blocks 230 and 233 of the Layer 3, but is performed on the blocks 231 and 232 of the Layer 3.
  • a lower node is not assigned to a Layer 4 acting as a lower layer of the above-mentioned non-block-divided blocks 230 and 233 of the Layer 3.
  • the block-divided blocks 231 and 232 of the Layer 3 assign a lower node to a lower layer. And the presence or absence of block division is represented in the lower node .
  • Layer 4 has the length of N/8, and includes blocks
  • the block division information (8) associated with the block 240 of the Layer 4 has the value of "0".
  • the block division information (a) associated with the block 242 of the Layer 4 has the value of "0".
  • the block division information (b) associated with the block 243 of the Layer 4 has the value of "0".
  • the block division is not performed on the blocks 240, 242, and 243 of the Layer 4, but is performed on the block 241 of the Layer 4.
  • a lower node is not assigned to a Layer 5 acting as a lower layer of the above-mentioned non-block-divided blocks 240, 242, and 243 of the Layer 4,
  • the block-divided block 241 of the Layer 4 assigns a lower node to the Layer 5, such that it indicates the presence or absence of block division in the above- mentioned lower node.
  • the Layer 5 has the length of N/16, and includes blocks 250 and 251 which are divided on block 241 of the Layer 4.
  • the block division information (c) associated with the block 250 of the Layer 5 has the value of "0".
  • the block division information (d) associated with the block 251 of the Layer 5 has the value of "0".
  • each of the blocks contained in the Layer 4 has the value of "O' , such that the hierarchical block division is not performed any more, and a block division depth of the block can be recognized.
  • the layout structure of blocks capable of being hierarchically-block-divided includes an N/4 block (i.e., a block having the length of N/4), an N/8 block, an N/16 block, an N/16 block, an N/8 block, an N/8 block, and an N/8 block.
  • block division information capable of being denoted by a binary number according to binary signaling sequences (1) (2) (3) (4) (5) (6) (7) (8) (9) (a) (b) (c) (d) , the block division information can be denoted by 13 bits "1110110010000".
  • the layer' s depth information is not additionally represented, and can be recognized by only block division information denoted by the division ID and non-division ID.
  • the other block division information for additionally representing the layer's depth information can also be signaling-processed.
  • the layer' s depth information is represented by a division-termination ID and a division- continuation ID.
  • the above-mentioned division-termination ID is indicative of the lowermost layer in which block division is not performed any more.
  • the above-mentioned division- continuation ID is indicative of the remaining layers except the lowermost layer. In this case, the division- continuation ID is denoted by "1", and the division- termination ID is denoted by "0".
  • the depth of the layer depicted in FIG. 1 is "5", and can also be represented by "11110" using the division-termination ID "0" and the division-continuation ID "1".
  • the size of a sub-block can be recognized by the above-mentioned signaling method.
  • only the non-division ID can be represented at a node assigned to the lowermost layer, such that the signaling process can be performed in the range from a current layer to a previous layer of the lowermost layer.
  • a specific value indicating whether the node assigned to the lowermost layer is divided may be represented by "0" indicating the division termination.
  • FIG. 2 is a conceptual diagram illustrating a method for signaling band division information according to another embodiment of the present invention.
  • FIG. 2 shows hierarchical band division configured in the structure of a tree in a sub-band filterbank.
  • a frequency resolution of the sub-band can be defined in various ways, and a detailed description thereof will hereinafter be described in detail.
  • the band division of FIG. 2 includes a plurality of bands in the uppermost layer, whereas an uppermost layer of FIG. 1 is composed of a single long block.
  • the band division information indicating whether the band is divided or not is represented by the division ID and the non-division ID.
  • the value of "1" is used as the division ID, and the value of "0" is used as the non-division ID.
  • the division ID and the non-division ID can be indicated at nodes for each layer.
  • the division ID indicates that a band of an M-th layer is divided into equal halves at an (M+l)-th layer.
  • the non-division ID indicates that a band of the M- th layer is not divided at the (M+l)-th layer and also indicates that that any lower node corresponding to a node which is represented by the non-division ID is not assigned to the lower layer.
  • To un-assign the lower node means that there is no performing additional signaling operations .
  • the Layer 1 acting as the uppermost layer includes first to sixth bands 310, 311, 312, 313, 314, and 315.
  • Band division information (1) of the first band 310 is denoted by “1”.
  • Band division information (2) of the second band 311 is denoted by “1”.
  • Band division information (3) of the third band 312 is denoted by "0”.
  • Band division information (4) of the fourth band 313 is denoted by "0".
  • Band division information (5) of the fifth band 314 is denoted by “0”.
  • Band division information (6) of the fourth band 313 is denoted by "0".
  • the above-mentioned band division information is indicated at the node assigned to the Layer 1.
  • the first band 310 creates a signal conversion module 310T
  • the second band 311 creates a signal conversion module 311T, such that lower bands 320, 321, 322, and 323 are created in the Layer 2.
  • Lower nodes are assigned to the lower bands 320, 321, 322, and 323.
  • the above-mentioned signal conversion module can also be called a "band conversion module" in the present embodiment.
  • the third, fourth, fifth, or sixth band 312, 313, 314, or 315 at which there is no band division does not create the band conversion module.
  • Lower bands corresponding to the Layer 2 are not also created in the third, fourth, fifth, or sixth band 312, 313, 314, or 315. Therefore, any lower node corresponding to 312, 313, 314 and 315 is not assigned to the layer 2.
  • the Layer 2 includes two bands 320 and 321 which are divided on the band 310 of the layer 1, and also includes two bands 322 and 323 which are divided on the band 311 of the layer 1.
  • Band division information (7) of the band 320 is denoted by "1”.
  • Band division information (8) of the band 321 is denoted by "1”.
  • Band division information (9) of the band 322 is denoted by "0”.
  • Band division information (10) of the band 323 is denoted by "0”.
  • the band 320 creates a band conversion module 320T
  • the band 321 creates a band conversion module 321T, such that lower bands 330, 331, 332, and 333 are created in the Layer 3.
  • Lower nodes are assigned to the lower bands 330, 331, 332, and 333.
  • the bands 322 and 323 at which there is no band division does not create the band conversion module.
  • Lower bands corresponding to the Layer 3 are not also created in the bands 322 and 323. Therefore, a lower node is also not assigned to the bands 322 and 323.
  • the Layer 3 includes two bands 330 and 331 which are divided on the band 320 of the layer 2, and also includes two bands 332 and 333 which are divided on the band 321 of the layer 2.
  • Band division information (11) of the band 330 is denoted by "1".
  • Band division information (12) of the band 331 is denoted by “0”.
  • Band division information (13) of the third band 332 is denoted by "0”.
  • Band division information (14) of the band 333 is denoted by ⁇ N 0" .
  • the band 330 creates a signal conversion module 330T, and the lower bands 340 and 341 are created in the Layer 4. Lower nodes are assigned to the lower bands 340 and 341.
  • the bands 331, 332, and 333 at which there is no band division does not create the band conversion module.
  • Lower bands corresponding to the Layer 4 are not also created in the bands 331, 332, and 333. Therefore, a lower node is also not assigned to the bands 322 and 323. Therefore, a lower node is also not assigned to the bands 331, 332, and 333.
  • the Layer 4 includes two bands 340 and 341 331 which are divided on the band 330 of the layer 3.
  • Band division information (15) of the band 340 is denoted by "0".
  • Band division information (16) of the band 341 is denoted by "0".
  • the lowermost layer is equal to the Layer 4.
  • the block division information can be denoted by 16 bits "1100001100100000".
  • FIG. 3 is a block diagram illustrating a signaling method for band division information according to another embodiment of the present invention.
  • the band division of FIG. 3 is similar to that of FIG. 2 in light of a method for performing the band division.
  • FIG. 3 a binary signaling sequence of the band division information in FIG. 3 is different from that of FIG. 2.
  • the block division information capable of being denoted by a binary number according to binary signaling sequences (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16), the block division information can be denoted by 16 bits "1110001001000000".
  • the above-mentioned description has disclosed an exemplary case in which the layer' s depth information is not additionally represented, and can be recognized by only band division information denoted by the division ID and non-division ID.
  • the other band division information for additionally representing the layer's depth information can also be signaling-processed.
  • the layer's depth information is represented by a division-termination ID and a division- continuation ID.
  • the above-mentioned division-termination ID is indicative of the lowermost layer in which band division is not performed any more.
  • the above-mentioned division- continuation ID is indicative of the remaining layers except the lowermost layer. In this case, the division- continuation ID is denoted by "1", and the divis ⁇ on- termination ID is denoted by "0".
  • the size of a sub-band can be recognized by the above-mentioned signaling method.
  • only the non-division ID can be represented at a node assigned to the lowermost layer, such that the signaling process can be performed in the range from a current layer to a previous layer of the lowermost layer.
  • a specific value indicating whether the node assigned to the lowermost layer is divided may be represented by "0" indicating the division termination.
  • Channel division information relates to channel configuration information used for channel configuration, such that a detailed description of channel division will hereinafter be described with reference to the above- mentioned channel configuration information.
  • Basic spatial information is required for coding the multi-channel audio signal.
  • the above-mentioned basic spatial information includes basic configuration information capable of indicating configuration information associated with basic environments and basic data corresponding to the basic configuration information.
  • the multi-channel audio coding selectively requires extension spatial information.
  • the above- mentioned extension spatial information includes extension configuration information indicating configuration information associated with extension environments and extension data corresponding to the extension configuration information.
  • the configuration information of the above-mentioned extension environment may exist one or more.
  • the above-mentioned extension environment can be identified by a type ID.
  • the channel configuration referred by the above-mentioned multi-channel signal coding is mainly classified into two channel configurations, i.e., a basic channel configuration and an extension channel configuration .
  • One or more channel configuration information is used as the above-mentioned basic channel configuration information.
  • the basic channel configuration information indicates a single channel configuration information selected from among several channel configuration information.
  • the basic channel configuration information is referred to as "fixed channel configuration information”
  • multiple channels i.e., a multi-channel
  • a fixed output channel multiple channels (i.e., a multi-channel) created by the fixed channel configuration information
  • the fixed channel configuration information is indicative of a single channel configuration component from among several pre-established channel configuration components.
  • the above-mentioned pre-established channel configuration may be represented in various ways.
  • the channel may be configured in the form of "5- 1-5", "5-2-5", “7-2-7”, or "7-5-7".
  • the above-mentioned "5-2-5" configuration is indicative of a specific channel structure in which six input channels are down-mixed in two channels, and the down-mixed channels is outputted to six channels.
  • the remaining channel configurations other than the "5-2-5" configuration have the same channel structure as that of the "5-2-5" configuration.
  • the above-mentioned fixed channel configuration information is contained in the basic configuration information, and data associated with the fixed channel configuration information is contained in basic data.
  • CLD Channel Level Difference
  • ICC Inter-Channel Coherences
  • CPC Channel Prediction Coefficients
  • the above-mentioned extension channel configuration indicates a channel configuration formed after the fixed channel configuration.
  • extension channel configuration information is referred to as arbitrary channel configuration information
  • multi-channel created by the arbitrary channel configuration information is referred to as an arbitrary output channel.
  • the above-mentioned arbitrary channel configuration information is contained in the extension configuration information, and is identified by a type ID called a channel ID.
  • the arbitrary channel configuration data corresponding to the arbitrary channel configuration information is contained in the extension data.
  • the above-mentioned arbitrary channel configuration data may use only the CLD parameter indicating a difference in energy between two channels for a simple operation.
  • the arbitrary channel configuration information is represented by the division ID and the non-division ID.
  • the division ID acting as a constituent element of the above-mentioned arbitrary channel configuration information indicates the increase the number of channels.
  • the non-division ID indicates a specific case in which there is no change in the number of channels.
  • the division ID indicates that one input channel is converted to two output channels.
  • Non- division ID indicates that an input channel is outputted without any change of number of channels .
  • lower channels are created in the lower layer, and lower nodes corresponding to the created channels are assigned to the lower layer.
  • the lower channels are not created in the lower layer, such that lower nodes corresponding to the lower channels are not assigned to the lower layer.
  • FIGS. 2 ⁇ 3 show not only the above-mentioned band
  • FIG. 2 Detailed description of FIG. 2 will be firstly described as follows.
  • the Layer 1 acting as the uppermost layer includes six bands 310, 311, 312, 313, 314, and 315.
  • the aforementioned bands 310, 311, 312, 313, 314, and 315 may serve as the above-mentioned fixed multi-channels, respectively.
  • the division ID is denoted by "1”
  • the non-division ID is denoted by "0".
  • a method for representing the arbitrary channel configuration information sequentially indicates the value "0" or 1" contained in the nodes assigned to the channels 310, 311, 312, 313, 314, and 315 of the Layer 1.
  • the method for representing the arbitrary channel configuration information sequentially indicates the value "0" or 1" contained in the nodes assigned to the channels 320, 321, 322, and 323 of the Layer 2.
  • the method for representing the arbitrary channel configuration information sequentially indicates the value "0" or 1" contained in the nodes assigned to the channels 330, 331, 332, and 333 of the Layer 3.
  • the method for representing the arbitrary channel configuration information sequentially indicates the value "0" or 1" contained in the nodes assigned to the channels 340 and 341 of the Layer 4.
  • the above-mentioned method sequentially indicates whether the number of channels increases at nodes of the upper layer, and then sequentially indicates whether the number of channels increases at nodes of the lower layer.
  • the arbitrary channel configuration information according to the above-mentioned method is represented by 16 bits "1100001100100000".
  • the method for representing the arbitrary channel configuration information is referred to as a "hierarchical priority method".
  • a first node of a upper layer is denoted by "1" when the signaling result is acquired from the first node of the upper layer
  • lower nodes corresponding to the first node of the upper layer indicate whether the number of channels sequentially increases. If the first node of the upper layer is denoted by "0" when the signaling result is acquired from the first node of the upper layer, a current node moves to a second node of the upper, such that the second node indicates that the number of channels sequentially increases. Therefore, the arbitrary channel configuration information acquired by the above-mentioned method is represented by 16 bits "1110001001000000".
  • the method for representing the arbitrary channel configuration information is referred to a "branch priority method".
  • FIG. 4 is a conceptual diagram illustrating a method for creating a multi-channel signal according to the present invention.
  • an arbitrary output channel (y) is created by calculation between a down-mix signal (x) and a basic matrix (ml), and another arbitrary output channel (z) is created by calculation between a fixed output channel (y) and a post matrix (m2) .
  • Two or more basic matrixes (ml) may exist as necessary.
  • Configuration elements of the basic matrix (ml) may be acquired by using at least one of CLD, ICC, CPC and the above-mentioned fixed channel configuration information .
  • Configuration elements of the post matrix (m2) may be acquired by using CLD and the above-mentioned arbitrary channel configuration information.
  • the above-mentioned exemplary method sequentially recognizes the division ID and the non-division ID, which act as the configuration components of the arbitrary channel configuration information, and performs the signal processing according to the recognized ID.
  • the recognized ID is determined to be the division ID
  • a single input channel is connected to the channel conversion module which is an example of the signal conversion, resulting in the creation of two lower channels .
  • the recognized ID is determined to be the non-division ID
  • the above-mentioned input channel is outputted without any change of the number of channels.
  • IDs to be decoded is set to "1", and an initial value of the number of arbitrary output channels is set to "0", and an initial value of the number of channel conversion modules is set to N "O".
  • an ID to be decoded is recognized.
  • the recognized ID is determined to be the division ID, the number of channel conversion modules increases by 1, and the number of IDs to be recognized increases by 1.
  • the recognized ID is determined to be the non- division ID
  • the number of arbitrary output channels increases by 1, and the number of IDs to be recognized is decreased by 1.
  • the above-mentioned signal processing method is repeated according to the number of fixed output channels.
  • the arbitrary channel configuration acquired when the arbitrary channel configuration information is denoted by "11100010010000" is shown in FIG. 3.
  • the "1" means the division ID
  • "0" means the non-division ID.
  • the number of "l”s indicates the number of channel conversion modules (i.e., a signal conversion module of FIG. 3), and the number of "0"s indicates the number of arbitrary output channels.
  • the fixed output channels may be rearranged (i.e., re-mapped) in different orders, and the arbitrary output channel may be then created, as shown in FIG. 5.
  • FIG. 5 is a conceptual diagram illustrating a method for signaling channel division information according to the present invention.
  • the fixed output channels 310, 311, 312, 313, 314, and 315 are re-arranged by the remapping module 100.
  • the re-arranged fixed output channels 310', 311', 312', 313', 314', and 315' act as the channels of the uppermost layer, such that the above-mentioned arbitrary output channel is created.
  • the above-mentioned arbitrary output channels may be rearranged or re-mapped in different orders.
  • channel mapping information for mapping the channels of the arbitrary channel configuration information to a speaker is contained in the arbitrary channel configuration information, the arbitrary output channel may also be mapped to the speaker.
  • the above-mentioned description has disclosed an exemplary case in which the layer' s depth information is not additionally represented, and can be recognized by the arbitrary channel configuration information denoted by the division ID and non-division ID.
  • the other arbitrary channel configuration information for additionally representing the layer' s depth information can also be represented.
  • the layer's depth information is represented by a division-termination ID and a division- continuation ID.
  • the above-mentioned division-termination ID is indicative of the lowermost layer in which channel division is not performed any more.
  • the above-mentioned division-continuation ID is indicative of the remaining layers except the lowermost layer. In this case, the division-continuation ID is denoted by "1", and the division-termination ID is denoted by "0".
  • only the non-division ID can be represented at a node assigned to the lowermost layer, such that the signaling process can be performed in the range from a current layer to a previous layer of the lowermost layer.
  • the division ID is denoted by "1” and the non-division ID is denoted by "0” and the division-continuation ID is denoted by "1”, and the division-termination ID is denoted by XN 0"
  • a specific value indicating whether the node assigned to the lowermost layer is divided may be represented by "0" indicating the division termination.
  • the lowermost layer can be recognized by the above- mentioned depth information, and it is assumed that the omitted value "0" exists, such that the above-mentioned arbitrary output channel can be configured.
  • the decoder may not use the received arbitrary channel configuration information as necessary.
  • the above-mentioned operations of the decoder may occur in an exemplary case in which the decoder recognizes the arbitrary channel configuration information and the size of the arbitrary channel configuration information, but skips over a predetermined range corresponding to the above-mentioned size.
  • a signaling method for division information according to the present invention has the following effects.
  • the above- mentioned signaling method according to the present invention can perform the signaling of the hierarchical block division information using minimum number of bits.
  • the signaling method according to the present invention need not additionally transmit specific information indicating the number of bits used for the signaling process, and can recognize not only the depth of a divided layer by a signaled signal but also the end of the signaled signal.
  • the signaling method according to the present invention can divide a plurality of sub-bands into number of different-sized sub-bands (e.g., sub-bands having different frequency bandwidths) using a minimum number of bits.
  • the signaling method according to the present invention can perform the signaling of specific information associated with an upmixing process, which allows a signal received in input channel (s) to be outputted via many more output channels than the input channel (s) .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Stereophonic System (AREA)

Abstract

Cette invention concerne un procédé de création d'un signal audio codé et de traitement dudit signal pendant le codage audio multi-canal. Ce procédée de création d'un signal audio codé consiste: à inclure des informations de configuration de base requises pour un processus de codage audio multi-canal; et à inclure des informations de configuration d'extension, ces dernières informations comprenant des informations de configuration de l'environnement d'extension identifié par un identificateur de type (ID).
EP06769319A 2005-07-29 2006-07-28 Creation d'un signal audio code et traitement d'un signal audio Ceased EP1920439A4 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US70346305P 2005-07-29 2005-07-29
US71652605P 2005-09-14 2005-09-14
KR1020060004048A KR20070031212A (ko) 2005-09-14 2006-01-13 오디오 신호의 인코딩/디코딩 방법 및 장치
KR1020060017659A KR20070014936A (ko) 2005-07-29 2006-02-23 오디오 신호의 인코딩/디코딩 방법 및 장치
KR1020060017660A KR20070014937A (ko) 2005-07-29 2006-02-23 오디오 신호의 인코딩/디코딩 방법 및 장치
US81602206P 2006-06-22 2006-06-22
PCT/KR2006/002985 WO2007013784A1 (fr) 2005-07-29 2006-07-28 Creation d'un signal audio code et traitement d'un signal audio

Publications (2)

Publication Number Publication Date
EP1920439A1 true EP1920439A1 (fr) 2008-05-14
EP1920439A4 EP1920439A4 (fr) 2010-01-06

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EP06769319A Ceased EP1920439A4 (fr) 2005-07-29 2006-07-28 Creation d'un signal audio code et traitement d'un signal audio
EP06769316A Ceased EP1920437A4 (fr) 2005-07-29 2006-07-28 Procede de signalisation d'informations coupees
EP06769318A Ceased EP1915757A4 (fr) 2005-07-29 2006-07-28 Procede destine au traitement d'un signal audio
EP06769309A Ceased EP1915756A4 (fr) 2005-07-29 2006-07-28 Procede pour la generation de signal audio code et procede pour le traitement de signal audio
EP06769317A Ceased EP1920438A4 (fr) 2005-07-29 2006-07-28 Procede de generation d'un signal sonore code et procede de traitement du signal sonore

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EP06769316A Ceased EP1920437A4 (fr) 2005-07-29 2006-07-28 Procede de signalisation d'informations coupees
EP06769318A Ceased EP1915757A4 (fr) 2005-07-29 2006-07-28 Procede destine au traitement d'un signal audio
EP06769309A Ceased EP1915756A4 (fr) 2005-07-29 2006-07-28 Procede pour la generation de signal audio code et procede pour le traitement de signal audio
EP06769317A Ceased EP1920438A4 (fr) 2005-07-29 2006-07-28 Procede de generation d'un signal sonore code et procede de traitement du signal sonore

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EP (5) EP1920439A4 (fr)
KR (5) KR100888970B1 (fr)
CN (5) CN101233568B (fr)
AU (1) AU2006273012B2 (fr)
CA (1) CA2617050C (fr)
RU (1) RU2414741C2 (fr)
WO (5) WO2007013784A1 (fr)

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EP1853092B1 (fr) 2006-05-04 2011-10-05 LG Electronics, Inc. Amélioration de signaux audio stéréo par capacité de remixage
EP2084901B1 (fr) 2006-10-12 2015-12-09 LG Electronics Inc. Appareil de traitement d'un signal de mélange et procédé associé
WO2008060111A1 (fr) 2006-11-15 2008-05-22 Lg Electronics Inc. Procédé et appareil de décodage de signal audio
JP5450085B2 (ja) 2006-12-07 2014-03-26 エルジー エレクトロニクス インコーポレイティド オーディオ処理方法及び装置
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EP2278582B1 (fr) * 2007-06-08 2016-08-10 LG Electronics Inc. Procédé et appareil de traitement de signal audio
JP2010538571A (ja) * 2007-09-06 2010-12-09 エルジー エレクトロニクス インコーポレイティド オーディオ信号のデコーディング方法及び装置
JP2011507013A (ja) 2007-12-06 2011-03-03 エルジー エレクトロニクス インコーポレイティド オーディオ信号処理方法及び装置
WO2011027494A1 (fr) 2009-09-01 2011-03-10 パナソニック株式会社 Dispositif d'émission de radiodiffusion numérique, dispositif de réception de radiodiffusion numérique, système de réception de radiodiffusion numérique
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CN101233570B (zh) 2011-06-22
CN101233570A (zh) 2008-07-30
EP1920439A4 (fr) 2010-01-06
KR100857103B1 (ko) 2008-09-08
EP1920438A4 (fr) 2010-01-06
WO2007013781A1 (fr) 2007-02-01
EP1915756A1 (fr) 2008-04-30
CN101233568A (zh) 2008-07-30
CN101233569A (zh) 2008-07-30
CN101233571A (zh) 2008-07-30
RU2414741C2 (ru) 2011-03-20
AU2006273012A1 (en) 2007-02-01
CA2617050C (fr) 2012-10-09
CA2617050A1 (fr) 2007-02-01
EP1920437A4 (fr) 2010-01-06
WO2007013784A1 (fr) 2007-02-01
CN101233568B (zh) 2010-10-27
WO2007013780A1 (fr) 2007-02-01
WO2007013783A1 (fr) 2007-02-01
KR20080033452A (ko) 2008-04-16
KR100857104B1 (ko) 2008-09-05
KR20080036119A (ko) 2008-04-24
CN101233567A (zh) 2008-07-30
AU2006273012B2 (en) 2010-06-24
KR100841332B1 (ko) 2008-06-25
KR20080030686A (ko) 2008-04-04
KR20080035656A (ko) 2008-04-23
EP1915757A4 (fr) 2010-01-06
KR100857102B1 (ko) 2008-09-08
KR20080034002A (ko) 2008-04-17
CN101233571B (zh) 2012-12-05
RU2008107773A (ru) 2009-09-10
EP1915757A1 (fr) 2008-04-30
CN101233569B (zh) 2010-09-01
EP1920437A1 (fr) 2008-05-14
EP1915756A4 (fr) 2010-01-06
CN101233567B (zh) 2011-06-15
WO2007013775A1 (fr) 2007-02-01
KR100888970B1 (ko) 2009-03-17
EP1920438A1 (fr) 2008-05-14

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