RU2414741C2 - Method of generating multichannel signal - Google Patents

Abstract

FIELD: physics. ^ SUBSTANCE: in the method, a reducing mixing signal is received, as well as information on base channel configuration, which indicates information on configuration of one channel from information on configurations of several pre-set channels, and information on configuration of the expanding channel which includes a type identifier. Base output channels are then formed using information on configuration of the base channel and the reducing mixing signal. At least one expansion output channel is formed using information on configuration of the expansion channel, and base output channels so that each expansion channel is formed only from one base channel. ^ EFFECT: formation of an increasing mixing channel. ^ 2 cl, 5 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a signaling method and, in particular, to a method of dividing a signal into several signals, and to efficiently present division information (also called “splitting information”) of the separated signals.

State of the art

In general, signals can be configured in various ways (e.g., block, band, and channel). The aforementioned signals can be processed without dividing by several units within a stationary period in which the signals can store predetermined statistical characteristics, since it is an advantage to compress the signals.

Preferably, the signal is processed fractionally during the transition period in which the characteristics of the signal change dramatically due to the prevention of signal distortion.

However, if the user wants to fractionally process the aforementioned signals, there is no detailed way to signal the shared information. Therefore, it is difficult to efficiently process the above signals.

SUMMARY OF THE INVENTION

Therefore, the present invention relates to a method for signaling division information, which essentially eliminates one or more problems due to limitations and disadvantages of the related art.

An object of the present invention, developed to solve the problem, is a method for efficiently signaling split signals.

The objective of the present invention can be solved by providing a signaling method for signal division information, comprising the steps of designating the number of lower nodes equal to the number of divisions to the lower level if the upper level node is represented by a division identifier (ID); and no lower node is assigned to the lower level if the upper level node is represented by a non-division identifier (ID), wherein the signal division information includes a division ID and a non-division ID indicating the presence or absence of signal division in the level node.

Brief Description of the Drawings

The accompanying drawings, which are included to provide a better understanding of the invention, illustrate embodiments of the invention and, together with the description, serve to explain the principle of the invention.

In the drawings:

1 is a conceptual diagram illustrating a signaling method for block information according to an embodiment of the present invention;

FIG. 2 and FIG. 3 are a conceptual diagram illustrating a signaling method for band and channel information according to an embodiment of the present invention;

4 is a conceptual diagram illustrating a method for generating a multi-channel signal according to another embodiment of the present invention; and

5 is a conceptual diagram illustrating a method for signaling channelization information according to another embodiment of the present invention.

The best embodiment of the invention

Detailed reference is now made to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings.

The signaling method for division information according to the present invention is described hereinbelow with reference to the accompanying drawings.

The signaling method for division information according to the present invention is classified into signal categories.

Before describing the present invention, it should be noted that the aforementioned signal is configured in various ways, for example, a block, a strip, and a channel.

The aforementioned “signaling method” may include the meaning of “signaling” or the meaning of “recognizing a signaling signal”.

The term “node” is a dot indicating whether the signal is divided or not.

The term "spatial information" is information capable of performing down-mixing (conversion with decreasing the number of channels) or up-mixing (conversion with increasing the number of channels) of a multi-channel signal.

It should be noted that spatial information indicates spatial parameters, however, it is not limited to the above examples and can be applied to other examples when necessary.

The aforementioned spatial parameters are the channel level difference (CLD, HAND) indicating the energy difference between the two channels, inter-channel coherence (ICC, MCC) indicating the correlation between the two channels, and the channel prediction coefficients (CPC, CPC) used to create three channels from two channels.

Below in this document, the division into blocks, division into bands and division into channels are described in detail.

1) Division into blocks

Block processing is required to compress serial time-domain data in the same manner as in audio signals.

The term “block processing” indicates that the input signal is fractionally processed at intervals of a predetermined distance.

In this case, the aforementioned interval is defined as a block, and one or more blocks are combined to configure the frame.

The above frame indicates a unit for transmitting / storing data.

The term "division into blocks" or "splitting into blocks" indicates a specific process in which the input signal is changed into blocks of different sizes during signal processing.

The term “block size information” is specific information indicating the block size obtained when the input signal is processed when changing to blocks of different sizes.

Basically, if the signal is configured as a block, the signal is processed using a long block or a short block.

In the case of using a short block, several short blocks are combined, and the combined blocks correspond to one long block.

However, the signal has different characteristics for each interval, so it is difficult to finally determine that all signals can be processed according to the signal processing scheme with a long block and the signal processing scheme with a short block.

Preferably, a block with a given size is selected from among blocks of various sizes suitable for the characteristics of the signal within a given interval, and then division into blocks is performed on the selected block.

In more detail, the blocks are configured to have two or more different sizes. A block with a predetermined size from among two or more blocks with different sizes can be selected from the frame in various ways.

For this purpose, it is necessary to indicate which blocks are contained in the current frame, so that a signaling method is required for the above operations.

The above signaling method is classified into a serial signaling method and a hierarchical signaling method.

The serial signaling method preliminarily determines the frame size (ie, the length indicated by “N”) and performs the signaling process using the number of blocks M with minimum sizes.

In this case, the length “N” of the frame is a multiple of a given M. The frame size may be a fixed value or may be a specified value that can be transmitted to the destination as additional information.

For example, provided that N is 2048 (N = 2048), M is 256 (M = 256) and the blocks are in the order 256 → 256 → 1024 → 512, information about the block size can be processed in a signal manner in the order M * 1, M * 1, M * 4, M * 2 → 1, 1, 4, 2 → 0, 0, 3, 1.

The hierarchical signaling method can be classified into a method for transmitting information about a level depth and a method for not transmitting information about a level depth, and a detailed description thereof will be given later in this document with reference to the accompanying drawings.

1 is a conceptual diagram illustrating a signaling method for block division information according to an embodiment of the present invention.

As shown in FIG. 1, each level is indicated by a level, and the depth of the level is set to “5”.

“Level 1” includes a first block 210, which is the longest block used as a base block for division into blocks, and the length of the first block 210 is N.

Positions (1), (2), ... (a), (b), (c) and (d) indicate exemplary binary signaling sequences.

According to the present embodiment, block division information indicating whether a block is divided or not is represented by a division ID (identifier) and a non-division ID. A predetermined number “1” is used as a division ID, and a predetermined number “0” is used as a non-division ID.

The above division IDs and non-division IDs are represented in nodes for each level.

The division ID indicates that the predefined block contained in the upper level is divided into equal halves in the lower level, and also indicates that the lower node is assigned to the lower level.

The non-division ID indicates that the predetermined upper-level block is not divided by the lower level, and also indicates that any lower node corresponding to the node that is represented by the non-division ID is not assigned to the lower level. The non-assignment of the lower node means that there is no additional signaling operation.

Since the information (1) on the division into blocks of the first block 210 has a value of 1 at the highest level (i.e., level 1), division into blocks of the first block 210 is performed.

Level 2, serving as the lower level for level 1, includes two blocks 220 and 221, each of which has a length of N / 2.

Information (2) on division into blocks of block 220 contained in level 2 has the value “1”, and information (3) on division into blocks of block 221 has the value “1”, so level 3, serving as the lower level for level 2, includes four blocks 230, 231, 232 and 233, each of which has a length of N / 4.

Information (4) on the division into blocks associated with the block 230 contained in level 3, has the value "0". Information (5) on the division into blocks associated with the block 231, has the value "1". Information (6) on the division into blocks associated with the block 232, has the value "1". Information (7) on the division into blocks associated with the block 233 contained in level 3, has the value "0".

Therefore, in accordance with the information on division into blocks of level 3, division into blocks is not performed on blocks 230 and 233 of level 3, but is performed on blocks 231 and 232 of level 3.

In this case, the lower node is not assigned to level 4, serving as the lower level of the aforementioned not divided into blocks of blocks 230 and 233 level 3.

Blocked blocks of blocks 231 and 232 of level 3 designate the lower node to the lower level. And the presence or absence of division into blocks is represented in the lower node.

Level 4 has a length of N / 8 and includes blocks 240 and 241 into which the level 3 block 231 is divided, and also includes other blocks 242 and 243 into which the level 3 block 232 is divided.

Information (8) on the division into blocks associated with the block 240 level 4, has the value "0". Information (9) on the division into blocks associated with the block 241 level 4, has the value "1". The blocking information (a) associated with the level 24 block 242 is set to “0”. The blocking information (b) associated with the level 4 block 243 is set to “0”.

Therefore, in accordance with the information about division into blocks of level 4, division into blocks is not performed on blocks 240, 242 and 243 of level 4, but is performed on block 241 of level 4.

In this case, the lower node is not assigned to level 5, serving as the lower level of the aforementioned not divided into blocks of blocks 240, 242 and 243 level 4.

Blocked block 241 level 4 assigns a lower node to level 5, so that it indicates the presence or absence of division into blocks in the aforementioned lower node.

Level 5 is N / 16 in length and includes blocks 250 and 251 into which level 4 block 241 is divided.

The blocking information (c) associated with the level 250 block 250 is set to “0”. The blocking information (d) associated with the level 5 block 251 is set to “0”.

Therefore, each of the blocks contained in level 4 has a value of “0”, so that hierarchical division into blocks is no longer performed, and the depth of division into blocks of a block can be recognized.

The arrangement structure of blocks having the ability to perform hierarchical division into blocks includes an N / 4 block (i.e., a block having a length of N / 4), an N / 8 block, an N / 16 block, an N / 16 block, N / 8 block, N / 8 block and N / 8 block.

If the signal length is N, the blocks divided into blocks have any one of the lengths (ie N / 2, N / 4, N / 8, N / 16 and N / 32 ...), as represented by “N / x ⁱ "(Where i = 1, 2, ... P, while P is an integer and x = 2).

In the case of submission of information on division into blocks that can be denoted by a binary number in accordance with the sequences (1) (2) (3) (4) (5) (6) (7) (8) (9) (a) (b) (c) (d) binary signaling, blocking information may be denoted by 13 bits of “1110110010000”.

The above description discloses an exemplary case in which information about the level depth is not additionally presented and can only be recognized by the division information indicated by the division ID and non-division ID.

However, it should be noted that other blocking information for further representing level depth information can also be processed by signaling.

For example, information about the depth of a level is represented by an ID to complete the division and an ID to continue the division.

The above division completion ID indicates the lowest level at which block division is no longer performed. The above continued division ID indicates the remaining levels except the lowest level. In this case, the ID of continuing the division is indicated by “1”, and the ID of the completion of division is indicated by “0”.

The depth of the level depicted in FIG. 1 is “5” and can also be represented by “11110” using the ID “0” to complete the division and the ID “1” to continue the division.

The size of the subunit can be recognized using the aforementioned signaling method.

Thus, in the case of additional presentation of information about the depth, only the non-partitioning ID can be represented in the node assigned to the lowest level, so that the signaling process can be performed in the range from the current level to the level previous to the lowest level.

For example, provided that the division ID is indicated by “1,” and the non-division ID is indicated by “0,” and the continued division ID is indicated by “1,” and the division completion ID is indicated by “0,” a predetermined value indicating whether or not to divide the node assigned to the lowest level may be represented by “0” indicating completion of the division.

2) Division into bands

Below in this document describes the division into bands with reference to Fig.2-3.

2 is a conceptual diagram illustrating a method for signaling banding information according to another embodiment of the present invention.

Figure 2 depicts a hierarchical banding configured in a tree structure in a subband filter block. The resolution for the frequency of the subband can be determined in various ways, and its detailed description is described in detail later in this document.

Compared to the division into blocks in FIG. 1, the division into bands in FIG. 2 includes a plurality of bands at the highest level, while the highest level in FIG. 1 consists of one long block.

According to the present embodiment, banding information indicating whether a band is divided or not is represented by a division ID and a non-division ID. The value “1” is used as the division ID, and the value “0” is used as the division number.

The division ID and non-division ID can be indicated in nodes for each level.

The division ID indicates that the M-th band is divided into equal halves at the (M + 1) -th level.

The non-division ID indicates that the strip of the Mth level is not divided at the (M + 1) -th level, and also indicates that any lower node corresponding to the node that is represented by the non-division ID is not assigned to the lower level. The non-assignment of the lower node means that no additional signaling operations are performed.

Level 1, serving as the uppermost level, includes first through sixth bands 310, 311, 312, 313, 314 and 315.

Information (1) on the division into strips of the first strip 310 is indicated by "1". Information (2) on the division into bands of the second strip 311 is indicated by "1". Information (3) on the division into bands of the third band 312 is indicated by "0". Information (4) on the division into bands of the fourth band 313 is indicated by "0". Information (5) on the division into bands of the fifth strip 314 is indicated by "0". Information (6) on the division into bands of the fourth band 313 is indicated by "0".

The above banding information is indicated in the node assigned to level 1.

In accordance with the banding information (1) and (2), the first strip 310 creates a signal conversion module 310T, and the second strip 311 creates a signal conversion module 311T, so that the lower bands 320, 321, 322 and 323 are created at level 2. The lower nodes are assigned to the lower bands 320, 321, 322 and 323. It should be noted that the aforementioned signal conversion module may also be called a “band conversion module" in the present embodiment.

Meanwhile, the third, fourth, fifth or sixth strip 312, 313, 314 or 315, on which there is no division into bands, does not create a band conversion module. The lower bands corresponding to level 2 are also not created in the third, fourth, fifth or sixth strip 312, 313, 314 or 315. Therefore, no lower node corresponding to 312, 313, 314 and 315 is assigned to level 2.

Level 2 includes two bands 320 and 321 into which the band 1 of level 1 is divided, and also includes two bands 322 and 323 into which the band of 311 level 1 is divided.

Information (7) on the division into strips of the strip 320 is indicated by "1". Information (8) on the division into strips of the strip 321 is indicated by “1”. Information (9) on the division into strips of the strip 322 is indicated by "0". Information (10) on the division into strips of the strip 323 is indicated by "0".

According to the aforementioned information on striping, the strip 320 creates the strip conversion module 320T, and the strip 321 creates the strip conversion module 321T, so that the lower stripes 330, 331, 332 and 333 are created at level 3. The lower nodes are assigned to the lower bands 330, 331, 332 and 333.

Meanwhile, the bands 322 and 323, on which there is no division into bands, do not create a band conversion module. Lower bands corresponding to level 3 are also not created in bands 322 and 323. Therefore, the lower node is also not assigned to bands 322 and 323.

Layer 3 includes two lanes 330 and 331 into which the lane 320 of level 2 is divided, and also includes two lanes 332 and 333 into which the lane 321 of level 2 is divided.

Information (11) on the division into strips of the strip 330 is indicated by "1". Information (12) on dividing strips of strip 331 is indicated by “0”. Information (13) on dividing into bands of the third band 332 is indicated by “0”. Information (14) on the division into strips of the band 333 is indicated by "0".

In accordance with the aforementioned banding information (11), the strip 330 creates a signal conversion module 330T, and the lower bands 340 and 341 are created at level 4. The lower nodes are assigned to the lower bands 340 and 341.

Meanwhile, strips 331, 332 and 333, in which there is no division into strips, do not create a band conversion module. The lower bands corresponding to level 4 are also not created in the bands 331, 332 and 333. Therefore, the lower node is also not assigned to the bands 322 and 323. Therefore, the lower node is also not assigned to the bands 331, 332 and 333.

Level 4 includes two lanes 340 and 341 into which the lane 330 of level 3 is divided.

Information (15) on the division into strips of the strip 340 is indicated by "0". Information (16) on the division into strips of the strip 341 is indicated by "0".

Therefore, there is no lower level capable of banding, and the signaling process ends. In this case, the lowest level is level 4.

In the case of submission of information on division into blocks that can be denoted by a binary number in accordance with the sequences (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) binary signaling, information about the division into blocks can be denoted by 16 bits of "1100001100100000".

FIG. 3 is a flowchart illustrating a signaling method for banding information according to another embodiment of the present invention.

Compared to FIG. 2, the division into strips of FIG. 3 is similar to the division of FIG. 2, taking into account the method of performing division into strips.

However, as shown in FIG. 3, the binary signaling sequence information of the banding in FIG. 3 is different from the sequence in FIG. 2.

Therefore, in the case of submission of information on division into blocks that can be denoted by a binary number in accordance with the sequences (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11 ) (12) (13) (14) (15) (16) binary signaling, information about the division into blocks can be denoted by 16 bits "1110001001000000".

The above description discloses an exemplary case in which level depth information is not additionally presented and can only be recognized by banding information denoted by a division ID and a non-division ID.

However, it should be noted that other banding information to further represent level depth information can also be processed by signaling.

For example, information about the depth of a level is represented by an ID to complete the division and an ID to continue the division.

The above division completion ID indicates the lowest level at which band division is no longer performed. The above continued division ID indicates the remaining levels except the lowest level. In this case, the ID of continuing the division is indicated by “1”, and the ID of the completion of division is indicated by “0”.

The depth of the level depicted in FIGS. 2-3 is “4” and can also be represented by “1110” using the ID “0” to complete the division and the ID “1” to continue the division.

The subband size can be recognized by the aforementioned signaling method.

Thus, in the case of additional presentation of depth information, only the non-division ID can be represented in the node assigned to the lowest level, so that the signaling process can be performed in the range from the current level to the level previous to the lowest level.

For example, provided that the division ID is indicated by “1,” and the non-division ID is indicated by “0,” and the continued division ID is indicated by “1,” and the division completion ID is indicated by “0,” a specific value indicating whether the node assigned to the lowest level can be represented by “0” indicating the completion of the division.

3) Channelization

Channel division information refers to channel configuration information used for channel configuration, so that a detailed description of channelization is described later in this document with reference to the above channel configuration information.

In particular, an example of a channel configuration obtained when a multi-channel audio signal is encoded or decoded is described in detail.

Basic spatial information is required for encoding a multi-channel audio signal. The aforementioned basic spatial information includes basic configuration information capable of indicating configuration information associated with the basic environments and the basic data corresponding to the basic configuration information.

Also, multi-channel audio coding selectively requires extensive spatial information. The aforementioned spatial spatial information includes expansion configuration information indicating configuration information associated with the expansion media and expansion data corresponding to the expansion configuration information. There may be one or more configuration information of the aforementioned expansion medium. The aforementioned expansion medium may be identified by a type ID.

Meanwhile, the channel configuration mentioned by the aforementioned multi-channel coding of the signal is classified mainly into two channel configurations, i.e. the configuration of the base channel and the configuration of the expansion channel.

The configuration information of one or more channels is used as the above configuration information of the base channel. In particular, the configuration information of the base channel indicates the configuration information of one channel selected from the configuration information of several channels.

For convenience of description, base channel configuration information is referred to as “fixed channel configuration information”, and multiple channels (ie, multi-channel) created by the fixed channel configuration information are referred to as “fixed output channel”.

Fixed channel configuration information and associated channel configuration information is required to create the aforementioned fixed output channel.

The fixed channel configuration information indicates one channel configuration component among several configuration components of predefined channels. The above configuration of the preset channels may be presented in various ways. For example, the channel may be configured as “5-1-5”, “5-2-5”, “7-2-7” or “7-5-7”.

The aforementioned “5-2-5” configuration indicates a predetermined channel structure in which six input channels are downmixed into two channels, and downmix channels are output to six channels. Other channel configurations other than the “5-2-5” configuration have the same channel structure as the “5-2-5” configuration structure.

The above fixed channel configuration information is contained in the basic configuration information, and data associated with the fixed channel configuration information is contained in the basic data.

Numerous parameters can be used as the aforementioned basic data, for example, a channel level difference (BRC) parameter indicating an energy difference between two channels, an inter-channel coherence parameter (MCC) indicating a correlation between two channels, and a channel prediction coefficient (CPC) parameter used to create three channels from two channels.

The aforementioned expansion channel configuration indicates a channel configuration formed after a fixed channel configuration.

The aforementioned expansion channel configuration is arbitrarily generated using coded signals. For convenience of description, the configuration information of the expansion channel is referred to as the configuration information of the arbitrary channel, and numerous channels created by the configuration information of the arbitrary channel are referred to as the arbitrary output channel.

The aforementioned arbitrary channel configuration information is contained in the expansion configuration information and is identified by a type ID called a channel ID.

The configuration data of an arbitrary channel corresponding to the configuration information of an arbitrary channel is contained in the expansion data.

If required, the aforementioned arbitrary channel configuration data can only use the HAND parameter indicating the energy difference between the two channels for a simple operation.

The configuration information of an arbitrary channel is represented by a division ID and a non-division ID. The division ID serving as a constituent element of the above-mentioned arbitrary channel configuration information indicates an increase in the number of channels. The non-division ID indicates a specific case in which there is no change in the number of channels.

For example, the division ID indicates that one input channel is converted to two output channels. The non-division ID indicates that the input channel is output without any change in the number of channels.

In the case of representing the division ID at the top-level node assigned to the upper-level channel, the lower channels are created at the lower level, and the lower nodes corresponding to the created channels are assigned to the lower level.

However, in the case of the subdivision ID being presented at the upper level node assigned to the upper level channel, the lower channels are not created at the lower level, so that the lower nodes corresponding to the lower channels are not assigned to the lower level.

A method for presenting the above-mentioned random channel configuration information using a division ID and a non-division ID is described later in this document with reference to FIGS. 2-3.

2 to 3 illustrate not only the aforementioned division into bands, but also the division into channels.

A detailed description of FIG. 2 is first described as follows.

Layer 1, acting as the uppermost level, includes six bands 310, 311, 312, 313, 314 and 315. The above bands 310, 311, 312, 313, 314 and 315 can serve as the aforementioned fixed multiple channels, respectively . According to the present invention, the division ID is indicated by “1”, and the non-division ID is indicated by “0”.

The method for presenting configuration information of an arbitrary channel sequentially indicates the values "0" or "1" contained in the nodes assigned to the channels 310, 311, 312, 313, 314 and 315 of level 1.

The method for presenting configuration information of an arbitrary channel sequentially indicates the values "0" or "1" contained in the nodes assigned to the channels 320, 321, 322 and 323 of level 2.

The method for presenting configuration information of an arbitrary channel sequentially indicates the values “0” or “1” contained in the nodes assigned to the channels 3, 3, 3, 332, and 333 of level 3.

The method for presenting configuration information of an arbitrary channel sequentially indicates the values "0" or "1" contained in the nodes assigned to channels 340 and 341 of level 4.

In other words, the aforementioned method successively indicates whether the number of channels at the nodes of the upper level increases, and then sequentially indicates whether the number of channels at the nodes of the lower level increases.

The random channel configuration information according to the above method is represented by 16 bits of “1100001100100000”.

For convenience of description, a method for presenting configuration information of an arbitrary channel is referred to as a “hierarchical priority method”.

According to the method of presenting configuration information of an arbitrary channel, as shown in FIG. 3, if the first top-level node is indicated by “1”, when the signaling result is obtained from the first upper-level node, the lower nodes corresponding to the first upper-level node indicate whether sequentially the number of channels. If the first top-level node is indicated by “0” when the signaling result is obtained from the first upper-level node, the current node moves to the second upper-level node, so that the second node indicates that the number of channels is increasing sequentially. Therefore, the random channel configuration information obtained by the above method is represented by 16 bits of “1110001001000000”.

For convenience of description, a method for presenting configuration information of an arbitrary channel is referred to as a “branch priority method”.

A method for creating a fixed output channel and an arbitrary output channel is described later in this document with reference to FIG.

4 is a conceptual diagram illustrating a method for creating a multi-channel signal according to the present invention.

As shown in FIG. 4, an arbitrary output channel (y) is created by computing between the downmix signal (x) and the base matrix (m1), and another arbitrary output channel (z) is created by computing between the fixed output channel (y) and the post-matrix (m2). If necessary, two or more basis matrices (m1) may exist.

The configuration elements of the basis matrix (m1) can be obtained by using at least one of the ARMs, MCCs, PDAs and the above fixed channel configuration information.

Post-matrix configuration elements (m2) can be obtained by using the HAND and the above-mentioned arbitrary channel configuration information.

Below in this document, a method for creating an arbitrary output channel is described in detail.

First, a method for configuring an arbitrary channel using arbitrary channel configuration information is described in detail.

An exemplary method for representing the above-mentioned random channel configuration information using the aforementioned branch priority method is described below.

The above exemplary method sequentially recognizes the division ID and non-division ID, which serve as configuration components of the configuration information of the arbitrary channel, and performs signal processing in accordance with the recognized ID.

If, as determined, the recognized ID is a division ID, a single input channel is connected to a channel conversion module, which is an example of a signal conversion, leading to the creation of two lower channels.

Otherwise, if, as determined, the recognized ID is a non-division ID, the aforementioned input channel is output without any change in the number of channels.

The following is a detailed description of this document.

At the first stage, the initial value of the number of IDs to be decoded is set to “1”, and the initial value of the number of arbitrary output channels is set to “0”, and the initial value of the number of channel conversion modules is set to “0”.

At the second stage, the ID to be decoded is recognized.

In the third step, if, as determined, the recognized ID is a division ID, the number of channel conversion modules is increased by 1, and the number of IDs to be recognized is increased by 1.

If, as determined, the recognized ID is a non-division ID, the number of arbitrary output channels increases by 1, and the number of IDs to be recognized decreases by 1.

Until the number of IDs to be decoded reaches "0", the aforementioned second and third steps are repeated.

The above signal processing method is repeated in accordance with the number of fixed output channels.

For example, a random channel configuration obtained when the random channel configuration information is denoted by “11100010010000” is depicted in FIG. 3. In this case, “1” means the division ID, and “0” means the division number.

The number “1” indicates the number of channel conversion modules (i.e., signal conversion modules in FIG. 3), and the number “0” indicates the number of arbitrary output channels.

Meanwhile, the fixed output channels can be reordered (i.e., reallocated) in other orders, and an arbitrary output channel can then be created, as shown in FIG.

5 is a conceptual diagram illustrating a method for signaling channelization information according to the present invention.

As shown in FIG. 5, the fixed output channels 310, 311, 312, 313, 314 and 315 are reordered by the redistribution unit 100. The reordered fixed output channels 310 ', 311', 312 ', 313', 314 'and 315' serve as the channels of the highest level, so that the aforementioned arbitrary output channel is created. It goes without saying that the aforementioned arbitrary output channels may be reordered or redistributed in other orders.

Meanwhile, if the channel allocation information for channel distribution of the arbitrary channel configuration information to the loudspeaker is contained in the arbitrary channel configuration information, the arbitrary output channel can also be distributed to the loudspeaker.

The above description discloses an exemplary case in which level depth information is not additionally presented and can be recognized by arbitrary channel configuration information denoted by a division ID and a non-division ID.

However, it should be noted that other configuration information of an arbitrary channel may also be provided to further represent level depth information.

For example, information about the depth of a level is represented by an ID to complete the division and an ID to continue the division.

The above division completion ID indicates the lowest level at which channel division is no longer performed. The above continued division ID indicates the remaining levels except the lowest level. In this case, the ID of continuing the division is indicated by “1”, and the ID of the completion of division is indicated by “0”.

The depth of the level depicted in FIGS. 2-3 is “4” and can also be represented by “1110” using the ID “0” to complete the division and the ID “1” to continue the division.

Thus, in the case of additional presentation of information about the depth, only the non-partitioning ID can be represented in the node assigned to the lowest level, so that the signaling process can be performed in the range from the current level to the level previous to the lowest level.

For example, provided that the division ID is indicated by “1,” and the non-division ID is indicated by “0,” and the continued division ID is indicated by “1,” and the division completion ID is indicated by “0,” a predetermined value indicating whether or not to divide the node assigned to the lowest level can be represented by "0", indicating the completion of the division.

Although the aforementioned situation actually takes place, the lowest level can be recognized by the aforementioned depth information, and it is assumed that a missing value of “0” exists, so that the aforementioned arbitrary output channel can be configured.

Meanwhile, although the above-mentioned random channel configuration information is transmitted to the decoder, it should be noted that the decoder may not use the received random channel configuration information when necessary. The aforementioned operations of the decoder can take place in an example case in which the decoder recognizes the configuration information of an arbitrary channel and the size of the configuration information of an arbitrary channel, but misses a predetermined range corresponding to the aforementioned size.

It will be apparent to those skilled in the art that various modifications and changes can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided that they come within the scope of the appended claims and their equivalents.

Industrial applicability

The signaling method for division information according to the present invention has the following results.

First, if a long block with a predetermined size is divided into short blocks of different sizes, the aforementioned signaling method according to the present invention can signal hierarchical blocking information using a minimum number of bits.

Secondly, the signaling method according to the present invention does not need to additionally transmit predetermined information indicating the number of bits used for the signaling process, and it can recognize not only the depth of the divided level by the signal to be signaled, but also the end of the signal to be signaled.

Thirdly, the signaling method according to the present invention can divide multiple subbands into several subbands of different sizes (for example, subbands having different bandwidths) using a minimum number of bits.

Fourthly, the signaling method according to the present invention can signal predetermined information associated with the upmixing process, which allows outputting a signal received on the input channel (s) to a larger number of output channels than the input channel (s).

Claims (2)

1. A method of creating a multi-channel signal, comprising stages in which
receiving a downmix signal, base channel configuration information indicating one channel configuration information from configuration information of several preset channels, and expansion channel configuration information including a type identifier;
creating base output channels using base channel configuration information and a downmix signal; and
create at least one expansion output channel using the configuration information of the expansion channel, and the base output channels, so that each expansion channel is created from only one base channel,
moreover, the number of basic output channels is greater than the number of channels of the downmix signal, and
however, the number of output channels of the generated signal, including at least one expansion output channel, is greater than the number of basic output channels. 2. The method according to claim 1, wherein the type identifier includes one identifier from a division identifier and a non-division identifier, wherein the division identifier indicates the division into channels in the level node in the expansion configuration of the audio channel tree, and the non-division identifier indicates the division into channels in the node level in the expansion configuration of the sound channel tree.

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