发明名称 |
Speech coder and speech decoder |
摘要 |
A code excited linear prediction speech decoder is provided. An adaptive codebook generates an adaptive code vector. A random codebook generates a random code vector. A synthesis filter receives a signal based on the adaptive code vector and the random code vector, and performs linear prediction coefficient synthesis on the signal. The random codebook includes a pulse vector provider that provides a pulse vector having a signed unit pulse, a comparator that compares a value of adaptive codebook gain with a preset threshold value, a selector that selects a dispersion pattern from a plurality of dispersion patterns stored in a memory in accordance with a result of the comparison, and a generator that generates the dispersed vector by convoluting the pulse vector and the selected dispersion pattern.
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申请公布号 |
US2006080091(A1) |
申请公布日期 |
2006.04.13 |
申请号 |
US20050281386 |
申请日期 |
2005.11.18 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YASUNAGA KAZUTOSHI;MORII TOSHIYUKI |
分类号 |
G10L19/12;G10L19/00;G10L19/10;G10L19/107 |
主分类号 |
G10L19/12 |
代理机构 |
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代理人 |
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地址 |
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