LINEAR PREDICTION BASED AUDIO CODING USING IMPROVED PROBABILITY DISTRIBUTION ESTIMATION

摘要

FIELD: audio equipment.;SUBSTANCE: invention relates to means for encoding audio. Linear prediction based audio decoder comprises: a probability distribution estimator, configured to be able to determine, for each of a plurality of spectral components, an estimate of the probability distribution from the information of the linear prediction coefficients, contained in the data stream, to which the audio signal is encoded; an entropy decoding and dequantizing cascade, configured to perform entropy decoding and dequantizing a spectrum, composed of said plurality of spectral components, from the data stream, using a probability distribution estimate, that is defined for each of said plurality of spectral components; and a filter configured to generate a spectrum according to a transfer function, dependent on the synthesizing linear prediction filter, determined by the information of the linear prediction coefficients.;EFFECT: technical result consists in improvement of efficiency of coding.;30 cl, 14 dwg