Invention Grant
US08428941B2 Method and apparatus for lossless encoding of a source signal using a lossy encoded data stream and a lossless extension data stream
有权
使用有损编码数据流和无损扩展数据流对源信号进行无损编码的方法和装置
- Patent Title: Method and apparatus for lossless encoding of a source signal using a lossy encoded data stream and a lossless extension data stream
- Patent Title (中): 使用有损编码数据流和无损扩展数据流对源信号进行无损编码的方法和装置
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Application No.: US12226992Application Date: 2007-04-18
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Publication No.: US08428941B2Publication Date: 2013-04-23
- Inventor: Johannes Boehm , Peter Jax , Florian Keiler , Oliver Wuebbolt , Sven Kordon
- Applicant: Johannes Boehm , Peter Jax , Florian Keiler , Oliver Wuebbolt , Sven Kordon
- Applicant Address: FR Issy-les-Moulineaux
- Assignee: Thomson Licensing
- Current Assignee: Thomson Licensing
- Current Assignee Address: FR Issy-les-Moulineaux
- Agency: Myers Wolin, LLC
- Priority: EP06113576 20060505
- International Application: PCT/EP2007/053783 WO 20070418
- International Announcement: WO2007/128661 WO 20071115
- Main IPC: G10L19/00
- IPC: G10L19/00 ; G10L19/12 ; G10L19/02
Abstract:
In lossy based lossless coding a PCM audio signal passes through a lossy encoder to a lossy decoder. The lossy encoder provides a lossy bit stream. The difference signal between the PCM signal and the lossy decoder output is lossless encoded, 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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