发明名称 |
Source coding enhancement using spectral-band replication |
摘要 |
<p>The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction (101) prior to or in the encoder (103), followed by spectral-band replication (105) at the decoder (107). This is accomplished by the use of new transposition methods, in combination with spectral envelope adjustments. Reduced bitrate at a given perceptual quality or an improved perceptual quality at a given bitrate is offered. The invention is preferably integrated in a hardware or software codec, but can also be implemented as a separate processor in combination with a codec. The invention offers substantial improvements practically independent of codec type and technological progress. <IMAGE></p> |
申请公布号 |
EP1367566(B1) |
申请公布日期 |
2005.08.31 |
申请号 |
EP20030020094 |
申请日期 |
1998.06.09 |
申请人 |
CODING TECHNOLOGIES AB |
发明人 |
LILJERYD, LARS;EKSTRAND, PER;HENN, FREDRIK;KJOERLING, KRISTOFER |
分类号 |
G10L21/038;H03M7/30;H04B1/66;(IPC1-7):H04B1/66;G10L21/02 |
主分类号 |
G10L21/038 |
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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