AUDIO ENCODER, AUDIO DECODER, METHOD OF ENCODING AUDIO INFORMATION, METHOD OF DECODING AUDIO INFORMATION AND COMPUTER PROGRAMME USING OPTIMISED HASH TABLE Russian patent published in 2015 - IPC G10L19/00 

FIELD: physics, acoustics.

SUBSTANCE: invention relates to means of encoding and decoding audio information using an optimised hash table. The method includes converting information from the frequency domain into the time domain to provide a time-domain audio representation using decoded spectral values to obtain decoded audio information; selecting a mapping rule describing the mapping of a code value, representing a spectral value or a matrix of most significant bits of the spectral value, in an encoded form into a symbol code representing the spectral value or matrix of most significant bits of the spectral value in a decoded form depending on the state of context described by the current numerical context value; determining the current numerical context value depending on a plurality of spectral values decoded earlier; estimating a hash table, entries of determine both significant values of the state among numerical context values and interval boundaries of the numerical context values.

EFFECT: high rate of transmitting information.

19 cl, 101 dwg