SELECTIVE BASS POST-FILTER Russian patent published in 2015 - IPC G10L19/26 

FIELD: physics, acoustics.

SUBSTANCE: invention relates to digital audio encoding and particularly to methods of encoding audio signals having components of different nature. The technical result is achieved through an audio encoding method, characterised by a decision being made as to whether the device which will decode the resulting bit stream should apply post-filtering including attenuation of inter-harmonic noise. Hence, the decision whether to use the post-filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable encoding mode. Another aspect provides an audio decoding method where the decoding step is followed by a post-filtering step, including inter-harmonic noise attenuation and characterised by a step of disabling the post-filter in accordance with post-filtering information encoded in the bit stream signal.

EFFECT: high accuracy of reproducing audio.

20 cl, 11 dwg