发明名称 |
VOICE DECODING DEVICE, VOICE DECODING METHOD, AND VOICE DECODING PROGRAM |
摘要 |
<P>PROBLEM TO BE SOLVED: To improve the subjective quality of a decoded signal by reducing generated pre-echoes and post-echoes without significantly increasing a bit rate in a band extension technology in a frequency region represented by SBR. <P>SOLUTION: A voice decoding device obtains a linear prediction coefficient by performing linear prediction analysis in a frequency direction to a signal represented by the frequency region based on a covariance method or an autocorrelation method, and deforms a time envelope of the signal by adjusting a filter intensity for the obtained linear prediction coefficient and then by filtering the signal in the frequency direction based on the adjusted coefficient. <P>COPYRIGHT: (C)2012,JPO&INPIT |
申请公布号 |
JP2012053493(A) |
申请公布日期 |
2012.03.15 |
申请号 |
JP20110271559 |
申请日期 |
2011.12.12 |
申请人 |
NTT DOCOMO INC |
发明人 |
TSUJINO KOSUKE;KIKUIRI KEI;NAKA NOBUHIKO |
分类号 |
G10L21/04;G10L19/02 |
主分类号 |
G10L21/04 |
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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