FIELD: speech analysis or synthesis; speech recognition.
SUBSTANCE: invention relates to means for contextual entropy coding of sample values of a spectral envelope. By a spectral-temporal method, the current sample value of the spectral envelope is predicted in order to obtain the estimated value for the current sample value. Context for the current sampling value is determined depending on the metric for deviating between a pair of already decoded sample values of the spectral envelope in the spectral-temporal vicinity of the current sampled value. Value of the prediction residual for the current sample value is entropy-decoded using the specified specific context. Combine the estimated value and the value of the prediction residual in order to obtain the current sampling value.
EFFECT: technical result consists in improvement of efficiency of coding.
24 cl, 14 dwg
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