发明名称 |
Method and apparatus for coding successive pitch periods in speech signal |
摘要 |
A method and apparatus for coding successive pitch periods of a speech signal. Based on a priori knowledge of statistical properties of successive speech periods, a shaped lattice structure is designed to cover the most probable points in the pitch space. The codebook index search starts with finding an open-loop estimate in the pitch space considering all dimensions and refining the open-loop estimate in a closed-loop search separately in each dimension based on the shaped lattice structure. The closed-loop search for the first subframe is for obtaining an absolute pitch period or a delta pitch while the closed-loop search for each of the other subframes is for obtaining a delta pitch for the respective subframe.
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申请公布号 |
US2003004709(A1) |
申请公布日期 |
2003.01.02 |
申请号 |
US20010878762 |
申请日期 |
2001.06.11 |
申请人 |
NOKIA CORPORATION |
发明人 |
HEIKKINEN ARI;RUOPPILA VESA T.;PIETILA SAMULI |
分类号 |
G10L19/08;(IPC1-7):G10L11/04 |
主分类号 |
G10L19/08 |
代理机构 |
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代理人 |
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地址 |
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