发明名称 |
Speaker-independent word recognizer |
摘要 |
Speaker-independent word recognition is performed, based on a small acoustically distinct vocabulary, with minimal hardware requirements. After a simple preconditioning filter, the zero crossing intervals of the input speech are measured and sorted by duration, to provide a rough measure of the frequency distribution within each input frame. The distribution of zero crossing intervals is transformed into a binary feature vector, which is compared with each reference template using a modified Hamming distance measure. A dynamic time warping algorithm is used to permit recognition of various speaker rate, and to economize on the reference template storage requirements. A mask vector for each reference template is used to ignore insignificant (or speaker-dependent) features of the words detected. |
申请公布号 |
US4763278(A) |
申请公布日期 |
1988.08.09 |
申请号 |
US19830484820 |
申请日期 |
1983.04.13 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
RAJASEKARAN, PERIAGARAM K.;DODDINGTON, GEORGE R. |
分类号 |
G10L11/00;G10L15/00;(IPC1-7):G10L5/00 |
主分类号 |
G10L11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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