Method and arrangement for producing comfort noise in a linear p

Details Method and arrangement for producing comfort noise in a linear p Method and arrangement for producing comfort noise in a linear p

1997-09-12

1999-11-02

Dorvil, Richemond

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704233, G10L 914

Patent

active

059787619

ABSTRACT:
Comfort noise is produced in a linear predictive speech decoder which operates discontinuously, i.e., treats data frames which alternately represent speech information and background noise. During decoding of received data frames which contain background noise-describing parameters, a first number of these data frames which have been received directly before a speech frame are excluded and replaced with one or more background noise describing frames which have been received earlier. Another number of the background noise-describing frames which have been received immediately after a sequence of speech frames are also left out during the decoding and replaced by one or more background noise-describing frames which have been received before the sequence of speech frames. This results in a minimized degradation of the background noise information and gives an optimal comfort noise on the receiver side.

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