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 |
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.
|