TIME WARP ACTIVATION SIGNAL TRANSMITTER, AUDIO SIGNAL ENCODER, METHOD OF CONVERTING TIME WARP ACTIVATION SIGNAL, METHOD FOR ENCODING AUDIO SIGNAL AND COMPUTER PROGRAMMES Russian patent published in 2016 - IPC G10L19/10 G10L21/04 

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to means of converting a time warp activation signal. An audio encoder includes a window function controller, a windower, a time warper with a final quality check functionality, a time/frequency converter, a TNS stage or a quantiser encoder, the window function controller, the time warper, the TNS stage or an additional noise filling (524) analyser being controlled by signal analysis results obtained by a time warp analyser or a signal classifier. A decoder applies a noise filling operation using a manipulated noise filling estimate depending on a harmonic or speech characteristic of the audio signal.

EFFECT: high encoding quality with a low data rate.

4 cl, 37 dwg