发明名称 |
Source coding enhancement using spectral-band replication |
摘要 |
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.
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申请公布号 |
US6680972(B1) |
申请公布日期 |
2004.01.20 |
申请号 |
US19990230799 |
申请日期 |
1999.02.09 |
申请人 |
CODING TECHNOLOGIES SWEDEN AB |
发明人 |
LILJERYD LARS GUSTAF;EKSTRAND PER RUNE ALBIN;HENN LARS FREDRIK;KJOERLING HANS MAGNUS KRISTOFER |
分类号 |
G10L19/02;G10L19/00;G10L21/02;G10L21/038;G10L21/04;H03M7/30;H04B1/66;(IPC1-7):H04B1/66 |
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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