发明公开
EP2176862A1 APPARATUS AND METHOD FOR CALCULATING BANDWIDTH EXTENSION DATA USING A SPECTRAL TILT CONTROLLING FRAMING
有权
装置和方法用于带宽扩展数据的计算使用一个SPEKTRALNEIGUNGS控制框架
- 专利标题： APPARATUS AND METHOD FOR CALCULATING BANDWIDTH EXTENSION DATA USING A SPECTRAL TILT CONTROLLING FRAMING
- 专利标题（中）： 装置和方法用于带宽扩展数据的计算使用一个SPEKTRALNEIGUNGS控制框架
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申请号： EP09776808.9申请日： 2009-06-23
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公开(公告)号： EP2176862A1公开(公告)日： 2010-04-21
- 发明人: NEUENDORF, Max , KRAEMER, Ulrich , NAGEL, Frederik , DISCH, Sascha , WABNIK, Stefan
- 申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- 申请人地址： Hansastrasse 27c 80686 München DE
- 专利权人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- 当前专利权人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
- 当前专利权人地址： Hansastrasse 27c 80686 München DE
- 代理机构： Zinkler, Franz
- 优先权： US79871 20080711
- 国际公布： WO2010003543 20100114
- 主分类号： G10L21/02
- IPC分类号： G10L21/02
摘要：
An apparatus for calculating bandwidth extension data of an audio signal in a bandwidth extension system, in which a first spectral band is encoded with a first number of bits and a second spectral band different from the first spectral band is encoded with a second number of bits, the second number of bits being smaller than the first number of bits, has a controllable bandwidth extension parameter calculator (10) for calculating bandwidth extension parameters for the second frequency band in a frame-wise manner for a sequence of frames of the audio signal. Each frame has a controllable start time instant. The apparatus additionally comprises a spectral tilt detector (12) for detecting a spectral tilt in a time portion of the audio signal and for signaling the start time instant for the individual frames of the audio signal depending on spectral tilt.
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