SELECTIVE BASS POST-FILTER Russian patent published in 2016 - IPC G10L19/26 

FIELD: acoustics.

SUBSTANCE: invention relates to encoding digital sound, specifically to means of encoding audio signals having components of different nature. Audio encoding method is characterised by a decision whether a device which will decode resultant bit stream must use post-filtering, including attenuation of inter-harmonic noise. Thus, decision on whether to use a post-filter, encoded inn bit stream, is made separately from decision on most suitable encoding mode. Audio decoding method, where a decoding step is followed by a post-filtering step, including inter-harmonic noise attenuation and characterised by presence of step of switching off post-filter in accordance with information on post-filtering, encoded in bit stream signal. Said method is well suited for audio signals of mixed origin due to its ability to deactivate post-filter depending only on information on post-filtering and, therefore, independently of such factors as current encoding mode.

EFFECT: technical result is improvement of accuracy of reproducing sound.

18 cl, 11 dwg