Method and apparatus for the transmission of speech signals.

摘要

In a speech signal transmitting system which effect VOX control, the transmitting side transmits a postamble and the succeeding background noise coded data at regular time intervals in a silent duration subsequent to a speech-active duration. At the receiving end, upon each reception of the background noise coded data in the silent duration, power information and prediction coefficients contained in the coded data are stored in a background noise parameter memory (22). A random pattern, generated by a random pattern generator (23), is used as a residual signal, and a background noise is synthesized by a background noise synthesizer (24) on the basis of the power information and prediction coefficients read out of the background noise parameter memory for each frame. In the speech-active duration a decoded speech is output, and in the silent duration the synthesized background noise is output. <IMAGE>