发明授权
US06510407B1 Method and apparatus for variable rate coding of speech 失效
语音可变速率编码的方法和装置

  • 专利标题: Method and apparatus for variable rate coding of speech
  • 专利标题(中): 语音可变速率编码的方法和装置
  • 申请号: US09421435
    申请日: 1999-10-19
  • 公开(公告)号: US06510407B1
    公开(公告)日: 2003-01-21
  • 发明人: Shihua Wang
  • 申请人: Shihua Wang
  • 主分类号: G10L1908
  • IPC分类号: G10L1908
Method and apparatus for variable rate coding of speech
摘要:
A speech encoding method using analysis-by-synthesis includes sampling an input speech and dividing the resulting speech samples into frames and subframes. The frames are analyzed to determine coefficients for the synthesis filter. The subframes are categorized into unvoiced, voiced and onset categories. Based on the category, a different coding scheme is used. The coded speech is fed into the synthesis filter, the output of which is compared to the input speech samples to produce an error signal. The coding is then adjusted per the error signal.
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