SCALED CODING OF SPEECH AND AUDIO USING COMBINATORIAL CODING OF MDCT-SPECTRUM Russian patent published in 2012 - IPC G10L19/00 G10L19/02 

FIELD: information technologies.

SUBSTANCE: in the method for coding in a scaled speech and audio codec, comprising several layers, a residual signal is produced from a coding layer on the basis of linear prediction with code excitation (CELP). The layer of coding on the basis of CELP comprises one or two previous layers in the scaled and audio codec, and at the same time the residual signal is a difference between the initial audio signal and the recovered version of the initial audio signal, the residual signal is converted, from the previous layer, in the later of transformation of discrete cosine transformation (DCT) type, in order to produce the appropriate transformation spectrum, having multiple spectral lines, and spectral lines of transformation spectrum are coded with application of a technology of combinatorial position coding.

EFFECT: reduced size of stored or sent information under efficient implementation of MDCT-spectrum coding.

40 cl, 13 dwg, 1 tbl