JITTER BUFFER CONTROL UNIT, AUDIO DECODER, METHOD AND COMPUTER PROGRAM Russian patent published in 2018 - IPC G10L21/04 G10L19/12 

FIELD: speech analysis or synthesis; speech recognition.

SUBSTANCE: invention relates to audio encoding and decoding devices. Frame-based time scaling or sample-based time scaling in a signal-adaptive manner is selected. Audio frames are dropped or inserted to control a depth of a jitter buffer when the frame-based time scaling is used, and wherein a time-shifted overlap-and-add of audio signal portions is performed when the sample-based time-scaling is used. Frame-based comfort noise insertion or frame-based comfort noise deletion is selected for time scaling if the intermittent transmission in combination with generation of comfort noise is currently used or was used for the previous frame. Overlap-and-add operation is selected using a predetermined time offset for time scaling if the current audio portion is active but contains a signal energy that is less than or equal to the threshold energy value.

EFFECT: technical result is higher encoding and decoding efficiency.

28 cl, 17 dwg