SELECTIVE BASS POST-FILTER Russian patent published in 2023 - IPC G10L19/26 

FIELD: computer technology for decoding video data.

SUBSTANCE: decoding of the bitstream signal as a preliminary temporal audio signal in one of the plurality of decoding modes, the said plurality of decoding modes including at least one first decoding mode including the post-filtering stage, and at least one second decoding mode not including the post-filtering stage. The post-filtering stage applies a tone boost filter to the preliminary temporal audio signal, thereby obtaining a temporal audio signal, wherein the tone boost filter is controlled by the post-filter gain, wherein in the said at least one first decoding mode the post-filtering step is selectively turned off in response only to the post-filtering information encoded in the bitstream signal by setting the post-filter gain to zero. The post-filtering information indicates the decision on the encoder side as to whether to disable post-filtering.

EFFECT: increased accuracy of reproduction of the sound signal.

7 cl, 11 dwg