ECHO CANCELING IN A SPEECH PROCESSING SYSTEM

摘要

A speech processing system includes an echo canceller 100 with a first input for receiving a first input signal from a microphone and a second input for receiving a second signal to be cancelled from the first input signal. The echo canceller subtracts the second input signal from the first input signal under control of a set of at least one reverberation parameter. A memory 200 stores a plurality of sets of reverberation parameters. Each of the sets is associated with a predetermined type of room. The system includes means 210 for selecting one of the sets of reverberation parameters for use by the echo canceller.