COMPATIBLE MULTICHANNEL CODING/DECODING Russian patent published in 2008 - IPC H04S3/00 

FIELD: radio engineering.

SUBSTANCE: invention relates to device and method of multichannel sound signal processing in the compatible stereo format. While processing the multichannel sound signal having at least three initial channels, (12) the first mixing channel and the second mixing channel which are extracted from the initial channels are transmitted. (14) Additional channel information is calculated for the initial channel selected from initial channels in such a way so that mixing channel or combined mixing channel, including the first and the second mixing channels, generate approximation of the selected initial channel using weighting with additional channel information. Additional channel information and the first/second mixing channels form output data (20), which are to be transmitted to the decoder. If a low-level decoder is used, only the first/second mixing channels are decoded; if a high-level decoder is used, a composite multichannel sound signal is transmitted basing on mixing channels and additional channel information.

EFFECT: due to additional channel information occupies few bits and decoder does not use an inverse matrix, effective and high-quality multichannel extension for stereo record-players and multichannel record-players is obtained.

29 cl, 10 dwg