METHOD AND SYSTEM FOR ENCODING AUDIO DATA WITH ADAPTIVE LOW FREQUENCY COMPENSATION Russian patent published in 2016 - IPC G10L19/28 

FIELD: physics.

SUBSTANCE: audio encoding method, which includes performing tonality detection on frequency domain audio data to generate compensation control data indicative of whether each low frequency band of a set of at least some low frequency bands of the audio data has prominent tonal content; for the said each low frequency band, generating a preliminary masking value for the audio data in the band; for the said each low frequency band, determining a masking value for the audio data in the band, wherein the masking value for the audio data in each said low frequency band having the prominent tonal content as indicated by the compensation control data is obtained by performing low frequency compensation to correct the preliminary masking value for the audio data in the band, and the masking value for each other low frequency band in the set is the preliminary masking value for the audio data in the band.

EFFECT: adaptive application of low frequency compensation when encoding audio signals having prominent low frequency tonal components without changing the decoder.

28 cl, 7 dwg