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US 8,948,404 B2Granted
Apparatus and method encoding/decoding with phase information and residual information
AssigneeSamsung Electronics Co., Ltd.
InventorsJung Hoe Kim, Eun Mi Oh
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Abstract
Provided is an apparatus and method of encoding and decoding multiple channel signals based upon phase information and one or more residual signals.
Claims9
An audio encoding method, comprising:
- extracting one or more spatial parameters associated with phase information of N audio channel signals and to encode the extracted one or more spatial parameters including an inter-channel phase difference (IPD) parameter;
- down-mixing the N audio channel signals into M channel signals, based on the extracted one or more spatial parameters;
- encoding a residual signal associated with the N audio channel signals based on the down-mixed M channel signals;
- encoding the M channel signals;
- and
- outputting the encoded residual signal and the encoded M channel signals,
- wherein the down-mixing of the N audio channel signals into the M channel signals is performed so that when the encoded M channel signals are up-mixed, by a decoder, the up-mixing is based a decoding of the encoded one or more spatial parameters, including a decoded IPD parameter, and an estimated overall phase difference (OPD) parameter estimated by the decoder based on the decoded one or more spatial parameters.
4 more elements
An audio encoding method, comprising:
- extracting spatial parameters for N audio channel signals and encoding one or more of the extracted spatial parameters including a phase difference parameter;
- down-mixing the N audio channel signals into M channel signals;
- encoding a residual signal for the M audio channels;
- and
- encoding the M channel signals,
- wherein the down-mixing of the N audio channel signals into the M channel signals is performed so a decoder can up-mix a decoding of the encoded M channel signals, received from a bitstream, based on a decoding of the residual signal, received from the bitstream, and an up-mixing matrix, with the up-mixing matrix being based on a result of a decoding by the decoder of the encoded spatial parameters, including the phase difference parameter, and an estimation of a different phase difference parameter by the decoder based on the decoded spatial parameters, wherein the different phase difference parameter is different from the decoded spatial parameters.
3 more elements
An audio encoding method, comprising:
- extracting spatial parameters for plural audio channel signals and encoding one or more of the extracted spatial parameters;
- down-mixing the plural audio channel signals to generate a down-mixed mono signal;
- and
- encoding the down-mixed mono signal,
- wherein the down-mixing of the plural audio channel signals into the down-mixed mono signal is performed so a decoder can up-mix a decoding of the encoded down-mixed mono signal, received from a bitstream, with the up-mixing being based on a decoding of the encoded spatial parameters, received from the bitstream, and an estimation, by the decoder, of a spatial parameter representing phase information between a left audio channel signal, of the plural audio channel signals, and the down-mixed mono signal, wherein the estimation of the spatial parameter representing phase difference is based on the decoded spatial parameters and different from the decoded spatial parameters.
2 more elements
Dependencies are inferred from the claim text.