US 11,790,923 B2
Stereo signal encoding method and apparatus, and stereo signal decoding method and apparatus
Eyal Shlomot, Long Beach, CA (US); Jonathan Alastair Gibbs, Cumbria (GB); and Halting Li, Beijing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Aug. 23, 2022, as Appl. No. 17/893,488.
Application 17/893,488 is a continuation of application No. 17/135,539, filed on Dec. 28, 2020, granted, now 11,462,223.
Application 17/135,539 is a continuation of application No. PCT/CN2019/093404, filed on Jun. 27, 2019.
Claims priority of application No. 201810701919.1 (CN), filed on Jun. 29, 2018.
Prior Publication US 2022/0406316 A1, Dec. 22, 2022
Int. Cl. G10L 19/008 (2013.01); G10L 19/038 (2013.01); G10L 19/06 (2013.01); G10L 19/032 (2013.01); G10L 19/07 (2013.01)
CPC G10L 19/008 (2013.01) [G10L 19/038 (2013.01); G10L 19/06 (2013.01); G10L 19/032 (2013.01); G10L 19/07 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining a frame of an audio signal that comprises a first channel signal and a second channel signal;
obtaining a plurality of first initial line spectral frequency (LSF) parameters of the first channel signal;
obtaining a plurality of second initial LSF parameters of the second channel signal;
obtaining a distance between the plurality of first initial LSF parameters and the plurality of second initial LSF parameters;
performing, when the distance is greater than or equal to a preset threshold, spectrum broadening on each of the plurality of first initial LSF parameters to obtain a plurality of first broadened LSF parameters;
obtaining a plurality of LSF residuals of the second channel signal at least according to the plurality of first broadened LSF parameters and the plurality of second initial LSF parameters;
encoding the plurality of LSF residuals to obtain an encoded bitstream corresponding to the frame; and
transmitting the encoded bitstream.