tailieunhanh - Báo cáo hóa học: " Efficient Fast Stereo Acoustic Echo Cancellation Based on Pairwise Optimal Weight Realization Technique"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Efficient Fast Stereo Acoustic Echo Cancellation Based on Pairwise Optimal Weight Realization Technique | Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006 Article ID84797 Pages 1-15 DOI ASP 2006 84797 Efficient Fast Stereo Acoustic Echo Cancellation Based on Pairwise Optimal Weight Realization Technique Masahiro Yukawa Noriaki Murakoshi and Isao Yamada Department of Communications and Integrated Systems Graduate School of Science and Engineering Tokyo Institute of Technology 2-12-1 Ookayama Meguro-Ku Tokyo 152-8550 Japan Received 1 February 2005 Revised 1 October 2005 Accepted 4 October 2005 In stereophonic acoustic echo cancellation SAEC problem fast and accurate tracking of echo path is strongly required for stable echo cancellation. In this paper we propose a class of efficient fast SAEC schemes with linear computational complexity with respect to filter length . The proposed schemes are based on pairwise optimal weight realization POWER technique thus realizing a best strategy in the sense of pairwise and worst-case optimization to use multiple-state information obtained by preprocessing. Numerical examples demonstrate that the proposed schemes significantly improve the convergence behavior compared with conventional methods in terms of system mismatch as well as echo return loss enhancement ERLE . Copyright 2006 Masahiro Yukawa et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION The ultimate goal of this paper is to develop an efficient adaptive filtering scheme with linear computational complexity to stably cancel acoustic coupling from loudspeakers to microphones occurring in telecommunications with stereophonic audio systems. This acoustic coupling is commonly called acoustic echo we just call it echo in the following . The stereophonic acoustic echo cancellation SAEC problem has become a central issue when we design high-quality .