发明授权
US07251596B2 Method and device for analyzing a wave signal and method and apparatus for pitch detection
失效
用于分析波信号的方法和装置以及用于音调检测的方法和装置
- 专利标题: Method and device for analyzing a wave signal and method and apparatus for pitch detection
- 专利标题(中): 用于分析波信号的方法和装置以及用于音调检测的方法和装置
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申请号: US10326104申请日: 2002-12-23
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公开(公告)号: US07251596B2公开(公告)日: 2007-07-31
- 发明人: Lianshan Zhu , Tao Yu
- 申请人: Lianshan Zhu , Tao Yu
- 申请人地址: JP Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JP Tokyo
- 代理机构: Fitzpatrick, Cella, Harper & Scinto
- 优先权: CN01145305 20011231
- 主分类号: G10L11/00
- IPC分类号: G10L11/00
摘要:
The present invention provides a unique wave-trigon transformation (WTT) method for performing transformation process over a wave signal. The present invention also provides a pitch detecting method and apparatus for detecting pitch based on the WTT process as well as a sentence detecting method and apparatus for detecting a sentence in a sound signal based on the WTT process. The pitch detecting method and apparatus can effectively detect pitch in a sound signal. In the WTT process, an inputted wave signal (such as a sound signal) is transformed into a series of trigons, and an energy-width spectrum is formed using these trigons. For a sound signal containing voice, the distribution of trigons transformed from the sound signal has a certain pattern. By analyzing the pattern, whether a pitch is contained in the sound signal can be determined. In particular, existence of a pitch can be determined by determining and evaluating the periodicity of trigons in a candidate chained peak in the energy-width spectrum.