发明名称 |
Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching |
摘要 |
The present invention provides a new method and an apparatus for spectral envelope encoding. The invention teaches how to perform and signal compactly a time/frequency mapping of the envelope representation, and further, encode the spectral envelope data efficiently using adaptive time/frequency directional coding. The method is applicable to both natural audio coding and speech coding systems and is especially suited for coders using SBR [WO 98/57436] or other high frequency reconstruction methods.
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申请公布号 |
US7191121(B2) |
申请公布日期 |
2007.03.13 |
申请号 |
US20050246284 |
申请日期 |
2005.10.11 |
申请人 |
CODING TECHNOLOGIES SWEDEN AB |
发明人 |
LILJERYD LARS GUSTAF;KJOERLING KRISTOFER;EKSTRAND PER;HENN FREDRIK |
分类号 |
G10L;G10L19/02;G10L19/022;G10L19/035;G10L19/06;G10L25/18 |
主分类号 |
G10L |
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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