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A stereophonic echo canceler using single adaptive filter

The paper proposes a new stereophonic echo canceler which can be realized by using single adaptive filter. Since most of conversations in telecommunication are single talking, the pseudo-stereophonic echo canceler (PST-EC), which is a monaural echo canceler and has only been applied to pseudo-stereophonic speech sound produced by attenuating and delaying monaural sound, is applicable to stereophonic communication. To cope with double talking, stereophonic speech sound is classified into strongly a correlated component (single talking) and a less correlated component (double talking). Therefore, PST-EC and echo suppressors can be applied to the former and the latter component, respectively.