发明名称 |
Adaptive audio signal source vector quantization device and adaptive audio signal source vector quantization method that search for pitch period based on variable resolution |
摘要 |
An adaptive sound source vector quantization device includes a first pitch cycle instructor, a search range calculator, and a second pitch cycle instructor. The first pitch cycle instructor successively instructs pitch cycle search candidates in a predetermined search range having a search resolution which transits over a predetermined pitch cycle candidate for the first sub-frame. The search range calculator calculates a predetermined range before and after the pitch cycle of the first sub-frame as the pitch cycle search range for the second sub-frame, if the predetermined range includes the predetermined pitch cycle search candidate. In the predetermined range, the search resolution transits over a boundary defined by the predetermined pitch cycle. The second pitch cycle instructor successively instructs the pitch cycle search candidates in the search range for the second sub-frame.
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申请公布号 |
US8521519(B2) |
申请公布日期 |
2013.08.27 |
申请号 |
US20080528661 |
申请日期 |
2008.02.29 |
申请人 |
SATO KAORU;MORII TOSHIYUKI;PANASONIC CORPORATION |
发明人 |
SATO KAORU;MORII TOSHIYUKI |
分类号 |
G10L19/02;G10L19/038;G10L19/09;G10L25/90 |
主分类号 |
G10L19/02 |
代理机构 |
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代理人 |
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