METHODS AND APPARATUS FOR SWITCHING CODING TECHNOLOGIES IN DEVICE Russian patent published in 2018 - IPC G10L19/20 G10L21/38 

FIELD: speech analysis or synthesis; speech recognition.

SUBSTANCE: invention relates to means for switching coding technologies when encoding an audio signal. First frame of an audio signal is encoded using analysis of a first region in a first encoder. When encoding the first frame, a baseband signal is generated, said baseband signal corresponding to an estimate of the high band of the audio signal or a synthesized version of at least a portion of the audio signal. Second frame of the audio signal is encoded using analysis of the second region in a second encoder by processing the first data representing the baseband signal, and second data representing a high band portion of the second frame to generate high band parameters associated with the second frame.

EFFECT: technical result consists in reducing artefacts at the frame boundaries and energy inconsistencies when switching coding technology.

40 cl, 8 dwg