发明名称 |
AUDIO ENCODER,AUDIO DECODER, METHOD FOR ENCODING AND AUDIO INFORMATION, METHOD FOR DECODING AN AUDIO INFORMATION AND COMPUTER PROGRAM USING A MODIFICATION OF A NUMBER REPRESENTATION OF A NUMERIC PREVIOUS CONTEXT VALUE |
摘要 |
An audio decoder includes an arithmetic decoder for providing decoded spectral values on the basis of an arithmetically-encoded representation of the spectral values and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value, and determines the numeric current context value in dependence on a plurality of previously-decoded spectral values. The arithmetic decoder modifies a number representation of a numeric previous context value, describing a context state associated with one or more previously decoded spectral values, in dependence on a context subregion value, to acquire a number representation of a numeric current context value describing a context state associated with one or more spectral values to be decoded. An audio encoder uses a similar concept. |
申请公布号 |
ZA201205939(B) |
申请公布日期 |
2013.05.29 |
申请号 |
ZA20120005939 |
申请日期 |
2012.08.07 |
申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E V |
发明人 |
SUBBARAMAN VIGNESH;FUCHS GUILLAUME;MULTRUS MARKUS;RETTELBACH NIKOLAUS;GAYER MARC;WEISS OLIVER;GRIEBEL CHRISTIAN;WARMBOLD PATRICK |
分类号 |
G10L;G10L19/00;G10L19/02 |
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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