A process for determining an echo coupling factor and the...

Details A process for determining an echo coupling factor and the... A process for determining an echo coupling factor and the...

H - Electricity

04

B

H04B 3/23 (2006.01) G10K 11/178 (2006.01) H04B 3/32 (2006.01) H04B 17/00 (2006.01)

Patent

CA 2285803

To be able to successfully compensate the echos occurring- in bidirectional telecommunications systems, comprising for example 2-wire/4-wire converters and/or AD/DA converters and/or satellite transmission links, the echo coupling factor and echo delay time for a system must be determined with a very high degree of accuracy and independently of the double talk situation. For this purpose, in accordance with the invention a process is provided wherein, by analyzing a dialogue, states and time segments are determined in which the probability of an incorrect evaluation of the coupling factor between the transmission paths and the echo delay time is very low. To improve the measurement accuracy, auxiliary quantities dependent upon the speech dynamics and the characteristic curve of the speech signal are introduced.

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