Difference between revisions of "Line Echo Cancellation"
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(New page: = Introduction = In voice calls you will usually hear an echo of what your self are saying, due to overhearing at the far end terminal. In line-switched networks over short distances, the ...) |
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Revision as of 17:13, 10 December 2007
Introduction
In voice calls you will usually hear an echo of what your self are saying, due to overhearing at the far end terminal. In line-switched networks over short distances, the delay of the echo is very small, and you feel it as a natural and pleasant feedback.
With VoIP technologies, the transmission delay will always be significant, due to transmission in packets. Echo of your own voice with 50 to 100 ms delay can be very anoing.
Echo Cancellation is a class of advanced signal processing techniques for reducing the echo from voice terminals.