发明授权
US08108209B2 Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks
有权
减少由实数滤波器组中的频谱包络调整引入的混叠的方法
- 专利标题： Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks
- 专利标题（中）： 减少由实数滤波器组中的频谱包络调整引入的混叠的方法
-
申请号： US12472147申请日： 2009-05-26
-
公开(公告)号： US08108209B2公开(公告)日： 2012-01-31
- 发明人: Kristofer Kjoerling , Lars Villemoes
- 申请人： Kristofer Kjoerling , Lars Villemoes
- 申请人地址： SE Stockholm
- 专利权人： Coding Technologies Sweden AB
- 当前专利权人： Coding Technologies Sweden AB
- 当前专利权人地址： SE Stockholm
- 代理机构： Glenn Patent Group
- 代理商 Michael A. Glenn
- 优先权： SE0202770 20020918; EPPCT/EP03/09485 20030827
- 主分类号： G10L19/00
- IPC分类号： G10L19/00
摘要：
The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
公开/授权文献
信息查询
