Adaptive filter for suppressing repetitive high-frequency information in a video data stream
US6879636B2 · kind B2 · utility
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13References
27Claims
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Key dates
| Filing date | Dec 10, 2001 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Sep 28, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/205
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image comprises pixels, and has repetitive high-frequency information. Decision circuitry identifies the repetitive high-frequency information in at least a subset of the pixels of the image to provide a repetitive-sequence signal. A low-pass filter filters the image to produce low-pass filtered pixels. A switch outputs the pixels of the image as adaptive-filter output, and in response to the repetitive-sequence signal, outputs the low-pass filtered pixels as the adaptive-filter output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.