发明名称 |
FAST CODE-VECTOR SEARCHING |
摘要 |
Methods and apparatus for quickly selecting an optimal excitation waveform from a codebook are presented herein. In encoding schemes that use forward and backward pitch enhancement, storage and processor load is reduced by approximating a two-dimensional autocorrelation matrix with a one-dimensional autocorrelation vector. The approximation is possible when a cross-correlation element is configured to determine the autocorrelation matrix of an impulse response and a pulse energy determination element is configured to determine the energy of a pulse code vector that incorporates secondary pulse positions. |
申请公布号 |
EP1399918(A1) |
申请公布日期 |
2004.03.24 |
申请号 |
EP20020737274 |
申请日期 |
2002.05.31 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
KANDHADAI, ANANTHAPADMANABHAN;DEJACO, ANDREW, P.;MANJUNATH, SHARATH |
分类号 |
G10L19/08;(IPC1-7):G10L19/10 |
主分类号 |
G10L19/08 |
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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