发明授权
- 专利标题： Providing a codebook for bandwidth extension of an acoustic signal
- 专利标题（中）： 提供用于声信号带宽扩展的码本
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申请号： US12047874申请日： 2008-03-13
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公开(公告)号： US08190429B2公开(公告)日： 2012-05-29
- 发明人: Bernd Iser , Gerhard Uwe Schmidt
- 申请人： Bernd Iser , Gerhard Uwe Schmidt
- 申请人地址： US MA Burlington
- 专利权人： Nuance Communications, Inc.
- 当前专利权人： Nuance Communications, Inc.
- 当前专利权人地址： US MA Burlington
- 代理机构： Sunstein Kann Murphy & Timbers LLP
- 优先权： EP07005313 20070314
- 主分类号： G10L19/12
- IPC分类号： G10L19/12
摘要：
A codebook spectral envelope may be used to extend the bandwidth of a bandwidth limited signal. A system includes codebooks that list codebook spectral envelopes. A codebook spectral envelope may be selected based on a characteristic of the spectral envelope of the bandwidth limited signal. Modifications of selected codebook spectral envelopes may generate a bandwidth extension signal that may be added to the bandwidth limited signal to improve the quality of the signal.
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