CLOCK SKEW COMPENSATION FOR ACOUSTIC ECHO CANCELLERS USING INAUDIBLE TONES

摘要

audio signals in acoustic echo method and apparatus are provided for the removal. Listener to insert the at least one tone that is substantially inaudible to the voice signal, determining a clock skew between the two sampling clock based on at least one tone of a frequency shift, and re-sampling the voice signal based on the determined clock skew , the acoustic echo is removed by performing the Acoustic Echo Cancellation Using the resampled audio signal. Acoustic echo canceller is provided, for example, may be implemented as a terminal-based and / or network-based acoustic echo canceller. Tone comprises a plurality of non-audible tone or tone as selective. Tone is generated around the tone frequency, speech power can be limited only at times to start the call or greater than the predetermined threshold value. The tone of the tone level can be selectively controlled to be masked by the audio signal.