STEREO SIGNAL CODING AND DECODING METHOD AND CODING AND DECODING APPARATUS

WIPO Patent Application WO/2020/001570

A8

Provided are a stereo signal coding method and apparatus and decoding method and apparatus. The coding method comprises: performing spectrum spreading on a quantized LSF parameter of a primary channel signal of a current frame in a stereo signal to obtain the LSF parameter of the primary channel signal after spectrum spreading (S510); determining the prediction residual of an LSF parameter of a secondary channel signal according to an original LSF parameter of the secondary channel signal of the current frame and the LSF parameter of the primary channel signal after spectrum spreading (S520); and performing quantization coding on the prediction residual of the LSF parameter of the secondary channel signal (S530). The coding and decoding method and apparatus facilitate a reduction in the number of bits in coding.

WO/2022/074283	QUANTISATION OF AUDIO PARAMETERS
WO/2011/124621	MDCT-BASED COMPLEX PREDICTION STEREO CODING
WO/2000/079520	IMPROVING SOUND QUALITY OF ESTABLISHED LOW BIT-RATE AUDIO CODING SYSTEMS WITHOUT LOSS OF DECODER COMPATIBILITY

SHLOMOT EYAL (US)
GIBBS JONATHAN ALASTAIR (GB)
LI HAITING (CN)

PCT/CN2019/093404

October 22, 2020

June 27, 2019

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HUAWEI TECH CO LTD (CN)

G10L19/008

LONGSUN LEAD IP LTD. (CN)

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