发明名称 |
Speech decoding apparatus, speech encoding apparatus, and lost frame concealment method |
摘要 |
A sound decoding device is capable of improving the lost frame compensation performance and improving quality of the decoded sound. A rise frame sound source compensation unit generates a compensation sound source signal when the current frame is a lost frame and a rise frame. An average sound source pattern update unit updates the average sound source pattern held in an average sound source pattern holding unit over a plurality of frames. When a frame is lost, an LPC synthesis unit performs LPC synthesis on a decoded sound source signal by using the compensation sound source signal inputted via a switching unit and a decoded LPC parameter from an LPC decoding unit and outputs the compensation decoded sound signal.
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申请公布号 |
US8255213(B2) |
申请公布日期 |
2012.08.28 |
申请号 |
US20070373085 |
申请日期 |
2007.07.11 |
申请人 |
YOSHIDA KOJI;EHARA HIROYUKI;PANASONIC CORPORATION |
发明人 |
YOSHIDA KOJI;EHARA HIROYUKI |
分类号 |
G10L19/00;G10L19/005 |
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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