Abstract: In one embodiment, the method includes receiving the audio signal having configuration information and multi-channels, and reading a first indicator from the configuration information. The first indicator indicates whether or not channel mapping information is included in the configuration information. The channel mapping information is read from the configuration information if the first indicator indicates that the channel mapping information is included in the configuration information. The channel mapping information indicates to which speaker in a reproduction device to map each channel in the audio signal. A second indicator is also read from the configuration information. The second indicator indicates whether or not channel rearrangement information is included in the configuration information. The channel rearrangement information is read from the configuration information if the second indicator indicates that the channel rearrangement information is included in the configuration information.

Abstract: In one embodiment, channel mapping information is added to configuration information for the audio signal. The channel mapping information indicates to which speaker in a reproduction device to map each channel in the audio signal. For example, the channel mapping information may include a plurality of bits where each bit is associated with a speaker and indicates whether a channel exists in the audio signal for the associated speaker.

Abstract: In one embodiment, the method includes receiving the audio signal including at least one block of audio data and configuration information, and reading coding type information and partitioning information from the configuration information. The coding type information indicates an entropy coding scheme used in encoding the audio signal, and the partitioning information indicates a sub-block partition scheme by which the block is divided into sub-blocks. Sub-block information is read from the block of audio data, and the sub-block information indicates a number of the sub-blocks into which the block is partitioned given the sub-block partitioning scheme. The number of the sub-blocks is determined based on the entropy coding scheme and the sub-block partition scheme. The partitioned sub-blocks are decoded based on the entropy coding scheme.

Abstract: In one embodiment, a channel in a frame of the audio signal is subdivided into a plurality of blocks according to a subdivision hierarchy. The subdivision hierarchy has more than one level, and each level being associated with a different block length. At least two of the blocks have different lengths. An optimum prediction order is determined for each block based on a maximum permitted prediction order and a length of the block, where a prediction order is the number of linear prediction coefficients. The optimum prediction order is selected as a minimum one of the global prediction order and the local prediction order. The global prediction order is determined based on the maximum permitted prediction order, and the local prediction order is determined based on the length of the block.

Abstract: In one embodiment, the method includes receiving an audio data frame having at least first and second channels. The first and second channels are synchronously subdivided into blocks such that the lengths of the blocks into which the second channel is subdivided correspond to the lengths of the blocks into which the first channel is subdivided if the first and second channels are correlated with each other and difference coding is used. The first and second channels are decoded and the subdivided blocks of the first and second channels are interleaved if the first and second channels are synchronously subdivided.

Abstract: In one embodiment, at least first and second channels in a frame of the audio signal are independently subdivided into blocks if the first and second channels are not correlated with each other. At least two of the blocks have different block lengths. Furthermore, the first and second channels are correspondingly subdivided into blocks such that the lengths of the blocks into which the second channel is subdivided correspond to the lengths of the blocks into which the first channel is subdivided if the first and second channels are correlated with each other. At least two of the blocks have different block lengths.

Abstract: In one embodiment, a channel in a frame of the audio signal is subdivided into a plurality of blocks according to a subdivision hierarchy. The subdivision hierarchy has more than one level, and each level is associated with a different block length. At least two of the blocks have different lengths. First subdivision information indicating whether the channel has been subdivided is generated, and second subdivision information is generated if the subdividing has been performed. The second subdivision information indicates the subdivision of the channel into the blocks.

Abstract: In one embodiment, random access unit information is added to an audio signal including a plurality of random access units. Each random access unit includes a number of frames and at least one of the frames being a random access frame. Each random access frame is a frame encoded such that previous frames are not necessary to decode the random access frame. The random access unit information indicates a distance between at least two of the random access frames in bytes.

Abstract: In one embodiment, the method includes receiving an audio signal having configuration information and multi-channels, and reading an indicator from the configuration information. The indicator indicates whether or not channel mapping information is included in the configuration information. The method further includes reading the channel mapping information from the configuration information if the indicator indicates that the channel mapping information is included in the configuration information. The channel mapping information indicates to which speaker in a reproduction device to map each channel in the audio signal. Channel rearrangement information is read from the configuration information. The channel rearrangement information indicates the rearrangement of the multi-channels. The multi-channels are decoded based on the channel mapping information and channel rearrangement information.

Abstract: In one embodiment, the method includes receiving the audio signal including at least one block of audio data and configuration information, and reading coding type information from the configuration information. The coding type information indicates an entropy coding scheme used in encoding the audio signal. Partitioning information is read from the configuration information, and the partitioning information indicates whether the block is divided into sub-blocks. The partitioned sub-blocks are decoded based on the entropy coding scheme if the block is divided into sub-blocks.

Abstract: In one embodiment, a channel in a frame of the audio signal is subdivided into a plurality of blocks, and at least two of the blocks have different lengths. An optimum prediction order for each block is determined based on a permitted prediction order and a length of the block.

Abstract: In one embodiment, the method includes receiving an audio data frame having at least first and second channels. The first and second channels are independently subdivided into blocks if the first and second channels are not correlated with each other. The first and second channels are decoded, and the subdivided blocks of the first and second channels are not interleaved if the first and second channels are independently subdivided.

Abstract: In one embodiment, at least first and second channels in a frame of the audio signal are independently subdivided into blocks if the first and second channels are not correlated with each other. The first and second channels are corresponding subdivided into blocks such that the lengths of the blocks into which the second channel is subdivided correspond to the lengths of the blocks into which the first channel is subdivided if the first and second channels are correlated with each other. First information may be generated to indicate the subdivision of the channel into the blocks and the first information is generated commonly for first and second channels when the channels are correlated, and the first information is generated respectively for each of first and second channels when the channels are not correlated.

Abstract: In one embodiment, the method includes receiving an audio data frame having at least one channel. The channel is subdivided into a plurality of blocks, and at least two of the blocks are capable of different lengths. The embodiment further includes obtaining information from the audio signal indicating the subdivision of the channel into the blocks, and decoding the channel based on the obtained information. In one embodiment, an optimum prediction order is obtained for each block in the channel, where a prediction order indicates a number of prediction coefficients. The optimum prediction order indicates a minimum one of a global prediction order and a local prediction order. The global prediction order is determined based on a maximum permitted prediction order, and the local prediction order is determined based on a length of the block.

Abstract: In one embodiment, at least one audio data frame having at least one channel is generated. Each channel is divided into a plurality of blocks. A sub-block partitioning scheme is selected, and a number of sub-blocks into which the block is to be partitioned is selected. The selected number of sub-blocks is chosen from numbers of sub-blocks available for the selected sub-block partitioning scheme. The block of audio data is partitioned into sub-blocks according to the selected number of sub-blocks, and the partitioned sub-blocks are coded according to a selected entropy coding scheme.

Abstract: In one embodiment, at least first and second channels in a frame of the audio signal are independently subdivided into blocks if the first and second channels are not correlated with each other. The first and second channels are corresponding subdivided into blocks such that the lengths of the blocks into which the second channel is subdivided correspond to the lengths of the blocks into which the first channel is subdivided if the first and second channels are correlated with each other. First information may be generated to indicate whether the first and second channels are independently subdivided or correspondingly subdivided.

Abstract: A method for processing an audio signal, comprising: receiving the audio signal; and processing the received audio signal, wherein the audio signal is processed according to a scheme comprising: comparing a size information of at least two blocks of A+1 level with a size information of a block of A level corresponding to the at least two of A+1 level; and, determining the at least two blocks of A+1 level as an optimum block if the size information of the at least two blocks of A+1 level is less than the size information of the block of A level is disclosed.

Abstract: In one embodiment, the method includes receiving the audio signal including a block of audio data partitioned into N sub-blocks, and restoring a plurality of code parameters s(0), s(1), . . . , s(N?1), respectively. The restoring step includes detecting s(0) from the audio signal, where s(0) represents the code parameter of the first sub-block; detecting a difference s(i)?s(i?1) from the audio signal for i=1, . . . N?1, where s(i) representing the code parameter of each sub-block following the first sub-block. The difference s(i)?s(i?1) is encoded by using first entropy code. The restoring step further includes calculating s(i) for i=1, . . . , N?1 using s(0) and the detected differences, and the method further includes decoding the N sub-blocks using the restored code parameters.

Abstract: In one embodiment, the method includes storing a plurality of entropy parameter tables, selecting one of the stored tables for entropy decoding based on a received audio signal, and entropy decoding at least one prediction coefficient value in the received audio signal based on the selected table.

Abstract: In one embodiment, the method includes receiving an audio signal including a prediction residual of a block of digital audio data and coded coefficient values. Table index information is obtained from the digital audio data. The table index information identifies a table from a plurality of tables to select. A set of prediction coefficient value are reconstructed from the coded-coefficient values. This reconstruction includes selecting a table including offset values and entropy parameters from the plurality of tables based on the table index information, first entropy decoding the coded-coefficient values using entropy codes defined by the entropy parameters from the selected table, and calculating a set of prediction coefficient values based on the offset values from the selected table and the decoded coded-coefficient values.