FIELD: technological processes.
SUBSTANCE: invention is related to method and device for improvement of masking shots of coded sound signal, which were deleted in the process of transfer from coder to decoder and for acceleration of restoration in decoder, after non-deleted shots of coded sound signal were accepted. When parameters of masking/restoration are determined in coder, they are transferred to decoder, where masking of deleted shots takes place and deleted shots are restored in accordance with parameters of masking/restoration. Masking/restoration parameters may be selected from the group that consists of the following: parameter of signal classification, parameter of energy information and parameter of phase information. Determination of masking/restoration parameters contains classification of sequential shots of coded sound signal as unvoiced shot, unvoiced conversion, voiced conversion, voiced shot or access shot, moreover, this classification is defined on the basis of the least part of the following parameters: parameter of normalized correlation, parameter of spectral gradient, parameter of relationship signal-noise, parameter of parameter main tone stability relative to parameter of shot relative energy and parameter of transition through zero.
EFFECT: improves masking of deleted shots of coded sound signal in the process of transfer from coder to decoder and acceleration of restoration in decoder.
177 cl, 7 dwg, 5 tbl
