ENCODING AND DECODING METHODS AND APPARATUSES FOR MULTI-CHANNEL SIGNALS

Disclosed are a multi-channel signal encoding and decoding method and apparatus. In a multi-channel signal encoding method, a current frame of a to-be-encoded multi-channel signal includes a first sound channel and a second sound channel. First group information of M blocks of the first sound channel and second group information of M blocks of the second sound channel are obtained. When the first group information and the second group information meet a preset condition, first adjusted group information and second adjusted group information are obtained based on the first group information and the second group information (405). Then, a first to-be-encoded spectrum is obtained based on the first adjusted group information and the spectrums of the M blocks of the first sound channel (406). Similarly, a second to-be-encoded spectrum may be obtained (407). Finally, the first to-be-encoded spectrum and the second to-be-encoded spectrum are encoded by using an encoding neural network, to obtain a spectrum encoding result (408). The spectrum encoding result may be carried by a bitstream (409). Blocks with different transient identifiers can be grouped, adjusted, and encoded. This improves encoding quality of the multi-channel signal.