DECODER AND DECODING METHOD FOR LC3 MASKING INCLUDING FULL FRAME LOSS MASKING AND PARTIAL FRAME LOSS MASKING Russian patent published in 2023 - IPC G10L19/05 

FIELD: computer technology for processing audio data.

SUBSTANCE: technical result is achieved by decoding the current frame to restore the audio signal, while the audio signal is encoded in the current frame, while the current frame contains the current working data of the bit stream, while the current working data of the bit stream contains a plurality of bits of working data, while the plurality of bits of working data encoding a plurality of spectral lines of an audio signal spectrum, while each of the working data bits exhibits a position in the working data of the bitstream; recovering the audio signal, while in the error concealment mode the audio signal recovery is performed by performing error concealment on those spectral lines of the audio signal spectrum that exhibit a frequency greater than a threshold frequency; and/or wherein, if error concealment is performed, error concealment is performed in a manner that depends on whether the previous working data of the bit stream of the previous frame preceding the current frame encodes a signal component of an audio signal that is tonal or harmonic; and audio output.

EFFECT: increasing the accuracy of error masking when processing audio data.

40 cl, 9 dwg