发明名称 |
ELECTROLARYNGEAL SPEECH ENHANCEMENT FOR TELEPHONY |
摘要 |
A technique for separating an acoustic signal into a voiced (V) component corresponding to an electrolaryngeal source and an unvoiced (U) component corresponding to a turbulence source. The technique can be used to improve the quality of electrolaryngeal speech, and may be adapted for use in a special purpose telephone. A method according to the invention extracts a segment of consecutive values from the original stream of numerical values, and performs a discrete Fourier transform on this first group of values. Next, a second group of values is extracted from components of the discrete Fourier transform result which correspond to an electrolaryngeal fixed repetition rate, FO, and harmonics thereof. An inverse-Fourier transform is applied to the second group of values, to produce a representation of a segment of the V component. Multiple V component segments are then concatenated to form a V component sample stream. Finally, the U component is determined by subtracting the V component sample stream from the original stream of numerical values.
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申请公布号 |
WO0159758(A1) |
申请公布日期 |
2001.08.16 |
申请号 |
WO2001US04252 |
申请日期 |
2001.02.08 |
申请人 |
SPEECH TECHNOLOGY AND APPLIED RESEARCH CORPORATION |
发明人 |
MACAUSLAN, JOEL, M.;CHARI, VENKATESH;GOLDHOR, RICHARD;ESPY-WILSON, CAROL |
分类号 |
G10L11/02;G10L11/06;G10L21/00;(IPC1-7):G10L11/06 |
主分类号 |
G10L11/02 |
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