A NLMS (normalized LMS) adaptive algorithm is proposed for an acoustic echo canceller with double the convergence speed of but the same computational load as the conventional NLMS. This algorithm, called the ES (exponential step) algorithm, implements a different value of step gain (feedback factor) for each tap coefficient of a canceller. These step gains are weighted exponentially along the series by the same exponential ratio as the expected variation in a room impulse response. This algorithm is implemented in a commercial subband echo canceller, and its superiority to the conventional algorithm is demonstrated.
|ジャーナル||ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings|
|出版ステータス||Published - 1990|
|イベント||1990 International Conference on Acoustics, Speech, and Signal Processing: Speech Processing 2, VLSI, Audio and Electroacoustics Part 2 (of 5) - Albuquerque, New Mexico, USA|
継続期間: 1990 4月 3 → 1990 4月 6
ASJC Scopus subject areas