| 摘要 |
<p>In a speakerphone device identification of signals (i.e., voice input or speaker output) in a process for reducing acoustic feedback, in a communication device, is accomplished by adding a signature nois (i.e., an identification mark) to output signals radiated by the speaker to enable these signals to be separated from speech input to the microphone. The signature noise entering the microphone is identified and analysed. The information obtained from the analysis is then used to control the echo cancellation of the device.</p> |
