Stereo signal encoding method and stereo signal encoding device

摘要

The present application provides a stereo signal encoding method and a stereo signal encoding apparatus.The encoding method isThe residual signal encoding parameter of the current frame of the stereo signal isIs a step of determining the downmix signal energy and the residual signal energy for each of the M subbands of the current frame;The residual frame encoding parameter of the current frame isIt is used to indicate whether M subbands are to be encoded.M subbands are at least a portion of N subbands.N is a positive integer greater thanM ≦ nM is a positive integer.Step 301 andBased on the residual signal encoding parameter of the current frameDetermining whether the residual signal of M subbands of the current frame is to be encoded (302) and.According to this coding method, the high frequency distortion of the decoded stereo signal can be reduced as much as possible while improving the spatial sense of the decoded stereo signal and the sound image stability, thereby improving the coding quality.