发明名称 |
Method and apparatus for speech analysing and synthesis using lattice-ladder filters |
摘要 |
A method and apparatus for analysing and synthesizing speech includes a programmable lattice-ladder notch filter which may be programmed to exhibit both filter poles and filter zeros and thereby exhibit a power spectral density with a better fit to that of a speech frame such that, when energized by a selected signal sample, a more accurate regeneration of speech is achieved. The filter parameters may be reliably and systematically determined as a single solution to a mathematical analysis given a set of gain parameters matching the observed co-variance data and having a prescribed set of transmission zeros. These transmission zeros may either be preselected as a design specification, or recovered from analysis of the speech data. A speech frame may be analysed and provide a set of parameters which may be transmitted to a remote location where a synthesizer may accurately reproduce the speech frame. A method and apparatus for speaker identification, and speaker verification with a smart card are disclosed implementing the lattice-ladder notch (LLN) filter methodology. <IMAGE>
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申请公布号 |
EP1594121(A1) |
申请公布日期 |
2005.11.09 |
申请号 |
EP20050075679 |
申请日期 |
1998.05.11 |
申请人 |
WASHINGTON UNIVERSITY |
发明人 |
BYYNES, CHRISTOPHER I.;LINDQUIST, ANDERS |
分类号 |
G10L11/00;G10L17/00;G10L19/02;(IPC1-7):G10L17/00 |
主分类号 |
G10L11/00 |
代理机构 |
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主权项 |
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地址 |
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