FIELD: information technology.
SUBSTANCE: basic idea of the invention is to ascertain information on the course of the bit rate change during a speech phase. According to the invention, during the speech phase, information on the percentage proportion of broadband speech frames in comparison to narrowband speech frames is compiled on the side of the decoder. A high percentage proportion of broadband active speech frames indicates that broadband use is preferred on the side of the decoder and therefore a need exists for synthesising noise information in broadband form during a DTX phase.
EFFECT: improving quality of a signal synthesised in the decoder by changing bit rate of the SID frame during speech-off.
13 cl, 3 dwg
