Multi-Channel Adaptive Signal Processing to be Applied to a Remoto Collaboration System with High Presence

多通道自适应信号处理应用于高临场感远程协作系统

• 批准号: 12650386
• 负责人: CHEN Guoyue
• 金额: $ 1.92万
• 依托单位: Akita Prefectural University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650386/
• 关键词: Adaptive Signal Processing; Multchannel; Active Noise Control; Frequency domain; Acoustic echo; Remoto Meeting; Filtered-x LMS algorithm; Step gain; イイズ除去; 周波数領域; Filtered-x LMS アルゴリズム

The most widely used adaptive filter algorithms for the feedforward active noise control (ANC) system are the filtered-x LMS algorithm and the multiple error filtered-x (MEFX) LMS algorithm, The convergence characteristics of these algorithms for the ANC system have been studied mostly in the time domain, and it was found that the convergence properties are subject to a distribution of the eigenvalues of the autocorrelation matrix of the filtered reference signal sequence. Analysis in the time domain, however, requires a great deal of computation, and its physical meaning is unclear. This project presents a method for evaluating the adaptive algorithm for the ANC system for multiple noise sources and multiple control points in the frequency domain.The echo canceller which connects a multi point has some acoustic echo paths. It is necessary to estimate some acoustic echo paths to communications by a good quality. Then, we studied the application of the multi point control to the multiple-channel echo canceller Specifically, we studied the multi-channel adaptive algorithm. We chose the projection algorithm which had the variable step gain as the adaptive algorithm. The acoustic echo path estimation is sped up by the sequential control of the step gain. Then, we calculated the theory equation of the step gain of the projection algorithm. When speakers in two remote places talk at the same time, and the acoustic echo path changes, we simulated the estimation of the acoustic echo path with the computer. As a result, the proposal method removed the acoustic echo at about two seconds, and we showed the effectiveness of this method.

前馈有源噪声控制(ANC)系统中应用最广泛的自适应滤波算法是滤波x LMS算法和多重误差滤波x(MEFX)LMS算法，主要在时间域研究了这两种算法的收敛特性，发现它们的收敛特性取决于滤波后参考信号序列的自相关矩阵的特征值分布。然而，在时间域中进行分析需要大量的计算，而且其物理意义尚不清楚。本课题提出了一种在频域内对多噪声源和多控制点自适应算法进行评估的方法。有必要对通信中的一些回声路径进行高质量的估计。然后，具体研究了多点控制在多通道回波抵消器中的应用，研究了多通道自适应算法。选择步长可变的投影算法作为自适应算法。通过对阶跃增益的顺序控制，加快了回波路径估计的速度。然后，我们计算了投影算法的阶跃增益的理论方程。当两个遥远地点的说话人同时通话时，回声路径发生变化，我们用计算机模拟了回声路径的估计。结果，提出的方法在大约两秒的时间内消除了声学回波，我们证明了该方法的有效性。

项目成果

武藤憲司, 陳国躍, 浅井紀久夫, 杉本裕二, 結城皖曠, 島田一雄: "エコーキャンセラのための射影アルゴリズムのステップゲインについて"平成13年度電気関係学会東北支部連合大会. 132-132 (2001)

Kenji Muto、Guoyue Chen、Kikuo Asai、Yuji Sugimoto、Koki Yuuki、Kazuo Shimada：“回声消除器投影算法的步进增益”2001 年电气工程学会东北分会会议 132-132 (2001)。

武藤憲司,陳国躍,浅井紀久夫,杉本裕二,結城皖曠,島田一雄: "可変ステップゲインを有する射影法による2チャンネルエコーキャンセラ"電気関係学会東北支部連合大会講演論文集. 37-37 (2000)

Kenji Muto、Guoyue Chen、Kikuo Asai、Yuji Sugimoto、Kohei Yuki、Kazuo Shimada：“使用可变步长增益投影法的双通道回声消除器”日本电气工程师学会东北分会会议记录 37-37。 (2000)

Guoyue Chen, Kenji Muto, Kikuo Asai, Yuji Sugimoto, Kiyohiro, Yuki, Kazuo Shimada: "A Study on Step Gain in an Adaptive Algorithm for Multi-Channel Echo Canceller"17th International Congress on Acoustics. 52-53 (2001)

Guiyue Chen、Kenji Muto、Kikuo Asai、Yuji Sugimoto、Kiyohiro、Yuki、Kazuo Shimada：“多通道回声消除器自适应算法中的步进增益研究”第 17 届国际声学大会。

Guoyue Chen, Masato Abe, Toshio Sone: "Analysis of the convergence characteristics of a multiple channel ANC System"8th International congress on sound and vibration. 215-220 (2001)

陈国跃、阿部正人、曾根敏夫：“多通道 ANC 系统的收敛特性分析”第八届国际声音与振动大会。

Guoyud Chen, Masato Abe, Toshio Sons: "The behavior of a multiple channel ANC system"The Seventh Western Pacific Regional Acoustics Conference. 537-540 (2000)

Guiyud Chen、Masato Abe、Toshio Sons：“多通道 ANC 系统的行为”第七届西太平洋区域声学会议。