| 摘要 |
FIELD: information technology.SUBSTANCE: method of smoothing stationary background noise involves receiving and decoding a signal representing a speech session, said signal comprising both a speech component and a background noise component; providing an indicator of noise properties for said signal, said indicator of noise properties indicating signal predictability, said predictability being defined in prediction gain indicators of a linear predictive coder (LPC) of said signal, and said background noise component is additively smoothed depending on the provided indicator of noise properties. Said smoothing operation is controlled by said indicator of noise properties through a smoothing control parameter which is varied gradually in accordance with the detected increase in said indicator of noise properties, and varied instantly in accordance with the detected decrease in said indicator of noise properties.EFFECT: improved control of the operation of smoothing background noise in speech sessions in telecommunication systems.22 cl, 7 dwg |
