Noise reduction systems and methods
US7711044B1 · kind B1 · utility
7Cited by
8References
23Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 16, 2004 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Mar 3, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of noise reduction systems and methods are disclosed. One method embodiment, among others, comprises transforming a residual signal to produce transform coefficients, and applying the transform coefficients to a quantization matrix and a configurable gain matrix to provide a frequency-selective weighting of the transform coefficients having a gain that is sensitive to noise levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.