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US4914749A Method capable of extracting a value of a spectral envelope parameter with a reduced amount of operations and a device therefor 失效
能够以减少的操作量提取频谱包络参数的值的方法及其装置

  • 专利标题： Method capable of extracting a value of a spectral envelope parameter with a reduced amount of operations and a device therefor
  • 专利标题（中）： 能够以减少的操作量提取频谱包络参数的值的方法及其装置
  • 申请号： US665852
    申请日： 1984-10-29
  • 公开(公告)号： US4914749A
    公开(公告)日： 1990-04-03
  • 发明人: Yukio Mitome
  • 申请人： Yukio Mitome
  • 申请人地址： JPX Tokyo
  • 专利权人： NEC Corporation
  • 当前专利权人： NEC Corporation
  • 当前专利权人地址： JPX Tokyo
  • 优先权： JPX58-201387 19831027
  • 主分类号： G10L11/00
  • IPC分类号： G10L11/00 ;  G10L19/02
Method capable of extracting a value of a spectral envelope parameter with a reduced amount of operations and a device therefor
摘要：
A logarithmic frequency spectrum related to an input signal is converted by the use of an inverse Fourier transform into a cepstrum. The cepstrum has a first and a second frequency component which have a first peak and a second peak spaced apart from the first peak by a preselected period on an axis of frequency, respectively. The second frequency component is processed into a peak controlled frequency component having a controlled peak coincident with the first peak. The peak controlled frequency component and the first frequency component are summed up to produce an ultimate frequency component which corresponds to the value of the envelope parameter.
摘要（中）：

与输入信号相关的对数频谱通过使用逆傅里叶变换转换成倒谱。 倒谱具有第一和第二频率分量，它们分别具有第一峰值和与第一峰值间隔开频率轴上的预选周期的第二峰值。 第二频率分量被处理成具有与第一峰值一致的受控峰值的峰值受控频率分量。 将峰值受控频率分量和第一频率分量相加，以产生对应于包络参数值的最终频率分量。

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