Stereo audio signal processing method, communication apparatus, and storage medium

A stereo audio signal processing method, performed by a decoding device, comprising:

• obtaining a coded stream transmitted by a coding device;
• determining two decorrelation processed channel signals and a flag bit based on the coded stream;
• and
• in response to the flag bit being a first value, obtaining a reconstructed audio signal by reconstructing the two decorrelation processed channel signals using a first decorrelation reconstructing method, and outputting the reconstructed audio signal;
• wherein the two decorrelation processed channel signals are obtained by decorrelating a current frame of the stereo audio signal;
• the flag bit being the first value indicates that a first cross-correlation coefficient for a left channel signal and a right channel signal of the current frame of the stereo audio signal before decorrelation is less than a second cross-correlation coefficient for the two decorrelation processed channel signals.

A communication apparatus, comprising:

• a processor;
• and
• a memory storing a computer program executable by the processor;
• wherein the processor is configured to perform:
• determining a first cross-correlation coefficient for a left channel signal and a right channel signal of a current frame of a stereo audio signal to identify a correlation form of the current frame of the stereo audio signal;
• and
• in response to the first cross-correlation coefficient being less than a first threshold, obtaining two decorrelation processed channel signals by using a first decorrelation processing method to decorrelate the current frame of the stereo audio signal, calculating a second cross-correlation coefficient for the two decorrelation processed channel signals to determine whether a decorrelation is achieved by the first decorrelation process method, and in response to the first cross-correlation coefficient being less than the second cross-correlation coefficient, determining a flag bit to be a first value, encoding the two decorrelation processed channel signals to obtain a coded stream, and writing the flag bit into the coded stream, wherein a value of the first threshold is in a range of (−1, 0).