New stereo echo canceller operating on single digital signal processor(<Special Issue>Applied Systems)

概要

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In this paper, we provide an overview of a new immersive, cost-effective stereo echo canceller that we have developed recently. To achieve immersive stereo hands-free communication, we expanded the frequency range from 0.1-7 kHz to 0.1-20 kHz and revised the echo reduction processing. To achieve a cost-effective canceller, we revised the adaptive algorithm to reduce the required memory and implemented the entire signal processing in a single fixed-point digital signal processor(DSP). The experiments indicate that the new stereo echo canceller delivers near-end speech and background sound more naturally under the double-talk situation.