COMPLEX TRANSFORMATION CHANNEL CODING WITH BROADBAND FREQUENCY CODING Russian patent published in 2015 - IPC H03M1/30 G10L19/00 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to complex transformation channel coding devices with broadband frequency coding. The coded data of multichannel sound are received in a bit flow, and the coded data of multichannel sound contain the coding data with channel expansion and coding data with frequency expansion, and coding data with channel expansion contain the combined channel for multiple sound channels and the set of parameters for representation of certain canals of this set of sound channels as modified versions of the combined channel. On the basis of information in the bit flow it is determined whether the named set of parameters contains the package of parameters containing a normalised correlation matrix, or the set of parameters containing the complex parameter representing the ratio containing the imaginary component and the real component for cross-correlation between two of the named set of sound channels. On the basis of this determination the named set of parameters is decoded. The set of sound channels is recovered using the coding data with channel expansion and coding data with frequency expansion.

EFFECT: improvement of quality of multichannel sound.

20 cl, 42 dwg, 1 tbl