Masahiro Fukui

New acoustic echo canceller for videotelephony-enabled wideband business phone

The implementation and evaluation of our new acoustic echo canceller for a videotelephony-enabled business phone is presented. The developed echo canceller has the following features, the sufficient echo and noise suppression, low processing delay, natural-sounding processed speech and low computational cost. The experimental results demonstrate that the new echo canceller suppresses the echo and noise sufficiently and thus achieves natural-sounding speech.

20-kHz frequency-range acoustic echo canceller for high-quality TV conferencing

This paper presents an overview of a new sub-band acoustic echo canceller for the 100 Hz–20 kHz frequency band that we have developed. It consists mainly of adaptive digital filter and echo reduction processes to eliminate an echo signal. The experimental results indicate that the new echo canceller suppresses the echo signal at least over 35 dB and delivers natural near-end speech sound even during double-talk situations.