发明名称 |
POST FILTER, DECODER, AND POST FILTERING METHOD |
摘要 |
<p>A post filter and a decoder enabling improvement of the sound quality of a decoded signal even when the sound quality of the decoded signal is different with the bands are disclosed. A frequency converting section (111) determines a decoded spectrum. A power spectrum computing section (112) computes the power spectrum from the decoded spectrum. A correction band determining section (113) determines the band in which the power spectrum is corrected according to layer information. A power spectrum correcting section (114) corrects the power spectrum in the corrected band in such a way that the variation along the frequency axis is suppressed. An inverse converting section (115) subjects the corrected power spectrum to inverse conversion to determine an autocorrelation function. An LPC analyzing section (116) determines an LPC coefficient of the determined autocorrelation function.</p> |
申请公布号 |
WO2006134992(A1) |
申请公布日期 |
2006.12.21 |
申请号 |
WO2006JP312001 |
申请日期 |
2006.06.15 |
申请人 |
OSHIKIRI, MASAHIRO;MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
OSHIKIRI, MASAHIRO |
分类号 |
G10L19/14;G10L21/02 |
主分类号 |
G10L19/14 |
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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