发明公开
EP1852848A1 Method and apparatus for lossless encoding of a source signal using a lossy encoded data stream and a lossless extension data stream
审中-公开
方法和装置，用于在源信号的无损编码，使用有损编码的数据流和无损扩展数据流
- 专利标题： Method and apparatus for lossless encoding of a source signal using a lossy encoded data stream and a lossless extension data stream
- 专利标题（中）： 方法和装置，用于在源信号的无损编码，使用有损编码的数据流和无损扩展数据流
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申请号： EP06113576.0申请日： 2006-05-05
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公开(公告)号： EP1852848A1公开(公告)日： 2007-11-07
- 发明人: Boehm, Johannes , Jax, Peter , Keiler, Florian , Niemeyer, Oliver , Kordon, Sven
- 申请人： DEUTSCHE THOMSON-BRANDT GMBH
- 申请人地址： Hermann Schweer Strasse 3 78048 Villingen-Schwenningen DE
- 专利权人： DEUTSCHE THOMSON-BRANDT GMBH
- 当前专利权人： DEUTSCHE THOMSON-BRANDT GMBH
- 当前专利权人地址： Hermann Schweer Strasse 3 78048 Villingen-Schwenningen DE
- 主分类号： G10L19/00
- IPC分类号： G10L19/00 ; G10L19/14
摘要：
In lossy based lossless coding a PCM audio signal passes through a lossy encoder (41) to a lossy decoder (42). The lossy encoder provides a lossy bit stream. The difference signal (S Diff ) between the PCM signal and the lossy decoder output is lossless encoded (52), providing an extension bit stream. The invention facilitates enhancing a lossy perceptual audio encoding/decoding by an extension that enables mathematically exact reproduction of the original waveform using enhanced de-correlation, and provides additional data for reconstructing at decoder site an intermediate-quality audio signal. The lossless extension can be used to extend the widely used mp3 encoding/decoding to lossless encoding/decoding and superior quality mp3 encoding/de-coding.
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