Study on Adaptive Comb filter for Auditory Scene Analysis

听觉场景分析的自适应梳状滤波器研究

基本信息

  • 批准号:
    12650420
  • 负责人:
  • 金额:
    $ 1.66万
  • 依托单位:
  • 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

项目摘要

In this study, we have developed optimal filters for quasi-periodic signals involving amplitude and pitch fluctuations (e.g., a real speech or instrumental sound) as a fundamental technology for realization of the auditory scene analysis.First, we derived linear optimal filters based on the quasi-periodic signal model. The Wiener filter solution under the steady-state condition leads to the constant-BW (-bandwidth)/constant-Q mixed comb structure in which each pass-band located at harmonic frequencies has a constant bandwidth in lower frequency, constant-Q characteristic in higher frequency, and those mixture appears in the intermediate frequency. It is shown that such filter banks closely imitates that of the human auditory system. Next, we derived a Kalman filter based on the Ito stochastic differential equation involving unknown random fluctuations as well as the given slowly varying fluctuations. It is verified that the steady-state solution coincides with the Wiener filter one.In addition, we have designed digital filters, which have not only a comb structure for extracting each harmonic component but also a notch structure for suppressing interference between harmonics components, based on digitization of the continuous Kalman filter equation. Finally, we have established a filter system for extracting a specific sound from among the mixed sound, and confirmed the validity of utilizing as the front-end processing for speech recognition.
在这项研究中,我们已经开发了最佳滤波器的准周期信号,涉及幅度和音调波动(例如,(真实的语音或乐器声)作为实现听觉场景分析的基础技术。稳态条件下的维纳滤波器解导致恒带宽/恒Q混合梳状结构,其中位于谐波频率处的每个通带在较低频率处具有恒定带宽,在较高频率处具有恒定Q特性,并且这些混合出现在中频。结果表明,这种滤波器组密切模仿人类听觉系统。接下来,我们推导出一个卡尔曼滤波器的伊藤随机微分方程的基础上,涉及未知的随机波动,以及给定的缓慢变化的波动。此外,在连续卡尔曼滤波方程数字化的基础上,设计了数字滤波器,它不仅具有用于提取各次谐波分量的梳状结构,而且具有用于抑制各次谐波分量间干扰的陷波结构。最后,我们建立了一个过滤系统,用于从混合声音中提取特定的声音,并确认了作为语音识别前端处理的有效性。

项目成果

期刊论文数量(18)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Kazuki Nishi: "An Optimal Filter-Bank for Harmonic Sound Analysis"Proc. Int. Congress on Acoustics. Vol.3. 3-06(2) (2001)
Kazuki Nishi:“谐波声音分析的最佳滤波器组”Proc。
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    0
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Kazuki Nishi: "Kalman Filter Analysis for quasi-Periodic Signals"Proc. IEEE Int. Conf. on Acoustics, Speech and Signal Processing. 3937-3940 (2001)
Kazuki Nishi:“准周期信号的卡尔曼滤波器分析”Proc。
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Kazuki Nishi: "Fourier Series Expansion and Harmonics Extraction Filter"Journal of Signal Processing. Vol.6 (in Japanese). 9-15 (2002)
Kazuki Nishi:“傅立叶级数展开和谐波提取滤波器”信号处理杂志。
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Kazuki Nishi: "An Optimal Filter-Bank for Harmonic Sound Analysis"Proc. Int. Congress on Acoustics. Vol.3. 3P.06 (2001)
Kazuki Nishi:“谐波声音分析的最佳滤波器组”Proc。
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    0
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Kazuki Nishi: "Kalman Filter Analysis for Quasi-Periodic Signals"Proc. IEEE Int. Conf. n Acoustics, Speach and Signal Processing. 3937-3940 (2001)
Kazuki Nishi:“准周期信号的卡尔曼滤波器分析”Proc。
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NISHI Kazuki其他文献

NISHI Kazuki的其他文献

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{{ truncateString('NISHI Kazuki', 18)}}的其他基金

Development of vibration measurement system based on distributed configuration with high-speed blanking lights
基于高速消隐灯分布式配置的振动测量系统开发
  • 批准号:
    22560415
  • 财政年份:
    2010
  • 资助金额:
    $ 1.66万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of high S/N, high definition and wide dynamic range camera system by exposure modulation
通过曝光调制开发高信噪比、高清、宽动态范围相机系统
  • 批准号:
    19500140
  • 财政年份:
    2007
  • 资助金额:
    $ 1.66万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Study on Dynamical Super-resolution Algorithm in Uniform/Log-polar Coordinate System
均匀/对数极坐标系动态超分辨率算法研究
  • 批准号:
    15500103
  • 财政年份:
    2003
  • 资助金额:
    $ 1.66万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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