Invention Grant
US09542950B2 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
- Patent Title: Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks
- Patent Title (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
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Application No.: US14080504Application Date: 2013-11-14
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Publication No.: US09542950B2Publication Date: 2017-01-10
- Inventor: Kristofer Kjoerling , Lars Villemoes
- Applicant: Dolby International AB
- Applicant Address: NL Amsterdam Zuid-Oost
- Assignee: Dolby International AB
- Current Assignee: Dolby International AB
- Current Assignee Address: NL Amsterdam Zuid-Oost
- Agency: Perkins Coie LLP
- Agent Michael A. Glenn
- Priority: SE0202770 20020918
- Main IPC: G10L21/00
- IPC: G10L21/00 ; G10L19/00 ; G10L19/02 ; G10L25/48 ; H03H17/02 ; G10L25/18
Abstract:
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.
Public/Granted literature
- US20140074462A1 METHOD FOR REDUCTION OF ALIASING INTRODUCED BY SPECTRAL ENVELOPE ADJUSTMENT IN REAL-VALUED FILTERBANKS Public/Granted day:2014-03-13
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