FIELD: analysis-synthesis of speech or audio signal.
SUBSTANCE: technical result is achieved by quantisation of coefficients obtained from current prediction error coefficient block using a set of predetermined quantisers; wherein set of predetermined quantifiers depends on predictor parameter; wherein set of predetermined quantifiers comprises different quantifiers with different signal-to-noise ratio and at least one quantiser with addition of pseudorandom noise; wherein said predictor parameter comprises a predictor gain ratio; wherein said predictor gain is a feature of the degree of significance of one or more previous blocks of reconstructed transform coefficients for the current unit of reconstructed transformation coefficients; wherein the number of quantisers with addition of pseudorandom noise enclosed in the set of predetermined quantizers depends on said predictor gain; and determining coefficients data for the bit stream based on said quantised coefficients.
EFFECT: technical result consists in improvement of accuracy of speech signal processing.
29 cl, 2 tbl, 10 dwg
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