Method of encoding and/or decoding digital audio using time-frequency correlation and apparatus performing the method
AssigneeSamsung Electronics Co., Ltd.
InventorsMathew Manu, Ki-seok Chang
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Abstract
An advanced digital audio encoding and/or decoding method and apparatus are provided. The digital audio encoding method involves (a) based on an input audio signal, generating a time-frequency band table; (b) based on the generated time-frequency band table, searching for a nearest neighbor block of a block being currently encoded, and generating information on the nearest neighbor block searched for; and (c) generating a bitstream containing the generated information on the nearest neighbor block.
Claims36
A digital audio signal encoding method comprising:
- (a) based on an input audio signal, generating a time-frequency band table;
- (b) based on the generated time-frequency band table, searching for a nearest neighbor block of a block being currently encoded, and generating information on the nearest neighbor block;
- and
- (c) generating a bitstream containing the generated information on the nearest neighbor block.
A digital audio signal encoding method comprising:
- (a) based on an input audio signal, generating a time-frequency band table;
- (b) based on the generated time-frequency band table, searching for a nearest neighbor block of a block being currently encoded;
- (c) based on the nearest neighbor block searched for, determining whether or not a block being currently encoded is a redundant block;
- and
- (d) based on the result determined in step (c), generating an output bitstream.
A digital audio signal encoding apparatus comprising:
- a time-frequency band table generation unit which, based on an input audio signal, generates a time-frequency band table;
- a nearest neighbor block searching and nearest neighbor block information generation unit which, based on the generated time-frequency band table, searches for a nearest neighbor block of a block being currently encoded, and generates information on the nearest neighbor block;
- and
- a bitstream packing unit which generates a bitstream containing the generated information on the nearest neighbor block.
A digital audio signal encoding apparatus comprising:
- a time-frequency band table generation unit which, based on an input audio signal, generates a time-frequency band table;
- a nearest neighbor block searching unit which, based on the generated time-frequency band table, searches for a nearest neighbor block of a block being currently encoded;
- a redundant block decision unit which, based on the nearest neighbor block, determines whether or not the block being currently encoded is a redundant block;
- and
- a bitstream generation unit which, based on the result determined in the redundant block decision unit, generates an output bitstream.
A decoding method for decoding an audio signal containing additional information on a predetermined region of the audio signal, comprising:
- (a) decoding a block which is not included in the predetermined region, from an input audio bitstream;
- (b) based on the decoded block data, generating a time-frequency band table corresponding to the predetermined region;
- and
- (c) by using the generated time-frequency band table, reconstructing a current block included in the predetermined region, based on the additional information on the predetermined region of the audio signal.
A decoding method for decoding a digital audio signal comprising:
- (a) extracting nearest neighbor block information from an input audio bitstream;
- (b) based on the input audio bitstream, generating a time-frequency band table;
- (c) based on the extracted nearest neighbor block information, determining whether or not a block being currently decoded is a redundant block;
- and
- (d) if the block being currently decoded is the redundant block, by using the generated time-frequency band table, reconstructing the redundant block based on the extracted nearest neighbor block information.
A decoding apparatus for decoding an audio signal containing additional information on a predetermined region of the audio signal, comprising:
- a decoding unit which decodes a block which is not included in the predetermined region, from an input audio bitstream;
- and
- a post-processing unit which, based on the decoded block data, generates a time-frequency band table corresponding to the predetermined region, and by using the generated time-frequency band table, reconstructs a current block included in the predetermined region, based on the additional information on the predetermined region of the audio signal.
A decoding apparatus for decoding a digital audio signal comprising:
- a nearest neighbor block information extracting unit which extracts nearest neighbor block information from an input audio bitstream;
- a time-frequency band table generation unit which, based on the input audio bitstream, generates a time-frequency band table;
- and
- a redundant block reconstruction unit which, based on the extracted nearest neighbor block information, determines whether or not a block being currently decoded is a redundant block, and if the block being currently decoded is the redundant block, by using the generated time-frequency band table, the redundant block reconstruction unit reconstructs the redundant block based on the extracted nearest neighbor block information.
Dependencies are inferred from the claim text.