MULTICHANNEL AUDIO SIGNAL ENCODING APPARATUS AND METHOD Russian patent published in 2012 - IPC G10L19/00 H04S1/00 H04S5/00 

FIELD: information technology.

SUBSTANCE: apparatus for encoding a mutichannel audio signal has a multichannel audio signal receiver, having a first and a second audio signal from a first and a second microphone, a time difference module for determining time difference between the first and second audio signals by combining successive observations of cross-correlations between the first and second audio signals, wherein the cross-correlations are normalised to derive state probabilities accumulated using a Viterbi algorithm to achieve time difference with built-in hysteresis, and the Viterbi algorithm calculates the state probability for each given state in form of a combined contribution of all routes included in that state, a delay module for multichannel audio signal compensation by delaying the first or second audio signal in response to the time difference signal, a monophonic module for generating a monophonic signal by combining multichannel audio signal compensation channels, and a monophonic signal encoder.

EFFECT: high quality and efficiency of encoding.

10 cl, 5 dwg