发明名称 |
Voice encoding device and voice encoding method |
摘要 |
Provided is an audio encoding device which can detect an optimal pitch pulse when using pitch pulse information as redundant information. The device includes: a search start decision unit (121) which decides the oldest point among a plurality of points where a pitch pulse may exist; a pitch pulse candidate selection unit (122) which defines a search range as a range between the search start point and the point preceding the point of the head of the current frame by one and selects a decoding sound source vector having a large amplitude in this search range as a pitch pulse position candidate; a selector switch (125) which successively switches a plurality of pitch pulse position candidates inputted from a pitch pulse candidate selection unit (122) for output to a pulse sequence generation unit (123) and an error minimization unit (124); a pulse sequence generation unit (123) which generates as a pulse sequence, a vector generated as an adaptive codebook component from the pitch pulse in the current frame when a pitch pulse is set to be a pitch pulse position candidate inputted from the selector switch (125).
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申请公布号 |
US8364472(B2) |
申请公布日期 |
2013.01.29 |
申请号 |
US20080528880 |
申请日期 |
2008.02.29 |
申请人 |
PANASONIC CORPORATION;EHARA HIROYUKI |
发明人 |
EHARA HIROYUKI |
分类号 |
G10L19/00;G10L19/005;G10L19/08;G10L19/09 |
主分类号 |
G10L19/00 |
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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