发明名称 |
Spectral smoothing device, encoding device, decoding device, communication terminal device, base station device, and spectral smoothing method |
摘要 |
<p>Disclosed is a spectral smoothing device with a structure whereby smoothing is performed after a nonlinear conversion has been performed for a spectrum calculated from an audio signal, and with which the amount of processing calculation is significantly reduced while maintaining excellent audio quality. With this spectral smoothing device, a sub band division unit (102) divides an input spectrum into multiple sub bands; a representative value calculation unit (103) calculates a representative value for each sub band using an arithmetic mean and a geometric mean; with respect to each representative value, a nonlinear conversion unit (104) performs a nonlinear conversion the characteristic of which is further emphasized as the value increases; and a smoothing unit (105) that smoothes the representative value which has undergone the nonlinear conversion for each sub band, at the frequency domain.</p> |
申请公布号 |
EP2320416(A1) |
申请公布日期 |
2011.05.11 |
申请号 |
EP20090804758 |
申请日期 |
2009.08.07 |
申请人 |
PANASONIC CORPORATION |
发明人 |
YAMANASHI, TOMOFUMI;OSHIKIRI, MASAHIRO;MORII, TOSHIYUKI;EHARA, HIROYUKI |
分类号 |
G10L19/02;G10L19/032;G10L19/24;G10L21/02 |
主分类号 |
G10L19/02 |
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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