Method and apparatus for suppressing background music or noise from the speech input of a speech recognizer
    1.
    发明公开
    Method and apparatus for suppressing background music or noise from the speech input of a speech recognizer 失效
    用于抑制背景音乐或侵入噪声的语音的输入信号的方法和装置

    公开(公告)号:EP0788089A3

    公开(公告)日:1998-09-30

    申请号:EP97300293

    申请日:1997-01-17

    Applicant: IBM

    CPC classification number: G10L21/0208

    Abstract: A method and apparatus for removing the effect of background music or noise from speech input to a speech recognizer so as to improve recognition accuracy has been devised. Samples of pure music or noise related to the background music or noise that corrupts the speech input are utilized to reduce the effect of the background in speech recognition. The pure music and noise samples can be obtained in a variety of ways. The music or noise corrupted speech input is segmented in overlapping segments and is then processed in two phases: first, the best matching pure music or noise segment is aligned with each speech segment; then a linear filter is built for each segment to remove the effect of background music or noise from the speech input and the overlapping segments are averaged to improve the signal to noise ratio. The resulting acoustic output can then be fed to a speech recognizer.

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