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KMID : 0917520080150010075
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Journal of Speech Sciences
2008 Volume.15 No. 1 p.75 ~ p.83
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Real-Time Implementation of Acoustic Echo Canceller Using TMS320C6711 DSK
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Heo Won-Chul
Bae Keun-Sung
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Abstract
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The interior of an automobile is a very noisy environment with both stationary cruising noise and the reverberated music or speech coming out from the audio system. For robust speech recognition in a car environment, it is necessary to extract a driver’s voice command well by removing those background noises. Since we can handle the music and speech signals from an audio system in a car, the reverberated music and speech sounds can be removed using an acoustic echo canceller. In this paper, we implement an acoustic echo canceller with robust double-talk detection algorithm using TMS-320C6711 DSK. First we developed the echo canceller on the PC for verifying the performance of echo cancellation, then implemented it on the TMS320C6711 DSK. For processing of one speech sample with 8kHz sampling rate and 256 filter taps of the echo canceller, the implemented system used only 0.035ms and achieved the ERLE of 20.73dB.
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KEYWORD
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acoustic echo canceller, TMS320C6711
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