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US 2019/0103123 A1Published application
Decoding audio bitstreams with enhanced spectral band replication metadata in at least one fill element
AssigneeDolby International AB
InventorsLars VILLEMOES, Heiko PURNHAGEN, Per EKSTRAND
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Abstract
Embodiments relate to an audio processing unit that includes a buffer, bitstream payload deformatter, and a decoding subsystem. The buffer stores at least one block of an encoded audio bitstream. The block includes a fill element that begins with an identifier followed by fill data. The fill data includes at least one flag identifying whether enhanced spectral band replication (eSBR) processing is to be performed on audio content of the block. A corresponding method for decoding an encoded audio bitstream is also provided.
Claims15
An audio processing device comprising:
- a buffer configured to store at least one block of an encoded audio bitstream;
- a bitstream payload deformatter coupled to the buffer and configured to demultiplex at least a portion of the at least one block of the encoded audio bitstream;
- and
- a decoding subsystem coupled to the bitstream payload deformatter and configured to decode at least a portion of the at least one block of the encoded audio bitstream, wherein the at least one block of the encoded audio bitstream includes:
- a fill element with an identifier indicating a start of the fill element and fill data after the identifier, wherein the fill data includes:
- at least one flag identifying whether enhanced spectral band replication processing is to be performed on audio content of the at least one block of the encoded audio bitstream, and
- enhanced spectral band replication metadata which does not include one or more parameters used for both spectral patching and harmonic transposition, wherein the enhanced spectral band replication metadata is metadata configured to enable at least one eSBR tool which is described or mentioned in the MPEG USAC standard and which is not described or mentioned in the MPEG-4 AAC standard,
- wherein the at least one flag is included in an extension payload and the audio processing device uses a function returning a number of bits of the extension payload.
5 more elements
An audio processing device, comprising:
- a buffer configured to store at least one block of an encoded audio bitstream;
- a bitstream payload deformatter coupled to the buffer and configured to demultiplex at least a portion of the at least one block of the encoded audio bitstream;
- and
- a decoding subsystem coupled to the bitstream payload deformatter and configured to decode at least a portion of the at least one block of the encoded audio bitstream, wherein the at least one block of the encoded audio bitstream includes:
- a fill element with an identifier indicating a start of the fill element and fill data after the identifier, wherein the fill data includes:
- at least one flag identifying whether enhanced spectral band replication processing is to be performed on audio content of the at least one block of the encoded audio bitstream, and
- enhanced spectral band replication metadata which does not include one or more parameters used for both spectral patching and harmonic transposition, wherein the enhanced spectral band replication metadata is metadata configured to enable at least one eSBR tool which is described or mentioned in the MPEG USAC standard and which is not described or mentioned in the MPEG-4 AAC standard,
- wherein the at least one flag is included in an extension payload and the audio processing device uses a function returning a number of bits of the extension payload.
5 more elements
A method for decoding an encoded audio bitstream, the method comprising:
- receiving at least one block of an encoded audio bitstream;
- demultiplexing at least a portion of the at least one block of the encoded audio bitstream;
- and
- decoding at least a portion of the at least one block of the encoded audio bitstream,
- wherein the at least one block of the encoded audio bitstream includes:
- a fill element with an identifier indicating a start of the fill element and fill data after the identifier, wherein the fill data includes:
- at least one flag identifying whether enhanced spectral band replication processing is to be performed on audio content of the at least one block of the encoded audio bitstream, and
- enhanced spectral band replication metadata which does not include one or more parameters used for both spectral patching and harmonic transposition, wherein the enhanced spectral band replication metadata is metadata configured to enable at least one eSBR tool which is described or mentioned in the MPEG USAC standard and which is not described or mentioned in the MPEG-4 AAC standard,
- wherein the at least one flag is included in an extension payload and the method includes uses a function returning a number of bits of the extension payload.
6 more elements
Dependencies are inferred from the claim text.