Masking noise modulation and interference noise in non-speech intervals in telecommunication system that uses echo cancellation, by inserting noise to match estimated level

摘要

The noise level (n(m)) during a non-speech interval is estimated. In the time segments of the non-speech intervals in which echoes occur, and the echoes and the noise are being suppressed, noise generated by a noise generator (3) is supplied to the created echo- and noise- gaps, so that the level of the inserted noise matches the level (n(m)) during the non-speech interval. An Independent claim is included for a circuit for carrying out the method.