发明名称 |
Method of recognizing speech pauses |
摘要 |
Method of recognizing pauses in a speech signal when a slowly varying noise signal is superposed on the speech signal. For the purpose of pause recognition so-called short-time mean values connected with a clock pulse are continuously determined from the samples of the disturbed speech signal, which short time mean values are a measure of the average power of approximately 100 ms long sections of the disturbed speech signals. The sequence of these short-time mean values is then smoothed by linear filtration or by means of a median filter. In parallel with the smoothing operation an estimate for the noise signal power averaged over a few seconds is taken from the sequence of short-time mean values. If the smoothed short-time mean value is once or several times less than a threshold which is proportional to the above-mentioned estimate, then it is decided that there is a speech pause.
|
申请公布号 |
US4700394(A) |
申请公布日期 |
1987.10.13 |
申请号 |
US19830552998 |
申请日期 |
1983.11.17 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
SELBACH, BERND;VARY, PETER |
分类号 |
G10L11/00;G10L11/02;G10L15/04;(IPC1-7):G10L5/00 |
主分类号 |
G10L11/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|