ACCURACY-OPTIMISED ENCODING WITH SUPRESSION OF LEAD ECHO Russian patent published in 2011 - IPC G01L19/00 

FIELD: information technology.

SUBSTANCE: method of encoding multichannel audio signals involves generating a first output signal (x'_mono) which represents coding parameters which characterise the main signal (x_mono). The main signal (x_mono) is a first linear combination of signals (16A, 16B) of at least a first and a second channel. The method also involves generating a second output signal (P_side), which represents coding parameters which characterise a side signal (x_side). The side signal (x_side) is a second linear combination of signals (16A, 16B) of at least a first and a second channel in the coding frame. Generation of the second output signal also includes scaling the side signal (x_side) on the energy loop of the main signal (x_mono).

EFFECT: high quality of perception of audio signals during transmission of multichannel signals at very low bitrates.

17 cl, 15 dwg