Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks
US8346566B2 · kind B2 · utility
26Cited by
32References
10Claims
0Family size
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Key dates
| Filing date | Aug 31, 2010 |
| Grant date | Jan 1, 2013 |
| Priority date | — |
| Expiry date | Aug 31, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0266
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.