| 视听系统声干扰的自适应抵消 |
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| 引用本文： | 向大威,顾亚平,许伟杰,李秀红.视听系统声干扰的自适应抵消[J].应用声学,1997,16(4):1-6,26. |
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| 作者姓名： | 向大威 顾亚平 许伟杰 李秀红 |
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| 作者单位： | 中国科学院声学研究所!上海，200032，中国科学院声学研究所!上海，200032，中国科学院声学研究所!上海，200032，中国科学院声学研究所!上海，200032 |
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| 摘 要： | 对一个用语音遥控的视听系统而言，视听系统本身所发出的声音常常造成语音识别的错误，本文所采用的自适应声干扰低消技术能有效地降低这种声干扰，基于自适应声干扰抵消最佳性能的分析，导出了抵消性能与权系数的个数以及混响时间的表达式，并实时地实现了带有１０２４个权系数的自适应声干扰抵消系统。在一般居室中，声干扰的抵肖可达２６ｄＢ。
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| 关 键 词： | 视听系统 声干扰 自适应抵消 语音识别 |
Self-adaptive cancellation of acoustic interference produced by an AV system |
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| Xiang Dawei,Gu Yaping,Xu Weijie and Li Xiuhong.Self-adaptive cancellation of acoustic interference produced by an AV system[J].Applied Acoustics,1997,16(4):1-6,26. |
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| Authors: | Xiang Dawei Gu Yaping Xu Weijie and Li Xiuhong |
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| Institution: | Institute of Acoustics, Academia Sinica, ShangHai, 200032;Institute of Acoustics, Academia Sinica, ShangHai, 200032;Institute of Acoustics, Academia Sinica, ShangHai, 200032;Institute of Acoustics, Academia Sinica, ShangHai, 200032 |
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| Abstract: | For an AV system under the remote control of speech, errors of speechrecognition are often observed caused by the sound produced by the AV system itself.Self-adaptive acoustic interference cancellation is used to reduced the acousticsinterference effectively. Based on the analysis of the optimum cancellation, therelations between cancellation and weight number or reverberation time have beenderlved. A real-time self-adaptive acoustic interference cancellation system with 1024weights is realized. In an ordinary living room, 26 dB acoustic interferencecancellation could be obtained. |
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| Keywords: | Acoustics interference produced by AV system Self-adaptive interference cancellation Real-time High-speed digital signal processing Grouped LMS algorithm |
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