- 专利标题: Linear predictive analysis apparatus, method, program and recording medium
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申请号: US15889684申请日: 2018-02-06
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公开(公告)号: US10134419B2公开(公告)日: 2018-11-20
- 发明人: Yutaka Kamamoto , Takehiro Moriya , Noboru Harada
- 申请人: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- 申请人地址: JP Tokyo
- 专利权人: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- 当前专利权人: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, McClelland, Maier & Neustadt, L.L.P.
- 优先权: JP2014-011318 20140124; JP2014-152525 20140728
- 主分类号: G10L19/00
- IPC分类号: G10L19/00 ; G10L21/00 ; G10L25/12 ; G10L25/06 ; G10L19/06 ; G10L25/90 ; G10L25/21
摘要:
An autocorrelation calculating part calculates autocorrelation Ro(i) from an input signal. A predictive coefficient calculating part performs linear predictive analysis using modified autocorrelation R′o(i) obtained by multiplying the autocorrelation Ro(i) by a coefficient wo(i). Here, it is assumed that a case where, for at least part of each order i, the coefficient wo(i) corresponding to each order i monotonically increases as a value having negative correlation with a fundamental frequency of an input signal in a current frame or a past frame increases and a case where the coefficient wo(i) monotonically decreases as a value having positive correlation with a pitch gain in a current frame or a past frame increases, are included.