| 摘要 |
A voice activity monitoring apparatus 10 for use with telecommunications apparatus having a local ear-piece 3 and a local microphone 2 receives a microphone audio signal A<SB>M</SB> and an ear-piece audio signal A<SB>E</SB> from the microphone and ear-piece respectively, transforms the received microphone audio and received ear-piece audio signals from the time domain to the frequency domain to generate respective transformation signals, and monitors the transformation signals as a function of time to derive voice activity information. Divergence of the transformation signals is indicative of voice activity of a distant party and a local party. If the signals track each other, voice activity solely of the local party is indicated.
|
