Motion detection circuit and a noise suppressing circuit including the same
US6687300B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1999 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Sep 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/246
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a motion detection circuit, a difference signal between the video and one-frame delayed video signals is generated Edge signals are generated from the video and delayed video signals. Motion in a target pixel is judged from the interframe difference signal according to the edge signals. A motion judging circuit further includes an LPF and a selector for supplying an output of the LPF or the difference signal. The motion judging circuit includes a polarity deviation detecting circuit for judging the motion as moving in the presence of agreement of the polarities of all pixels at any of peripheral areas around the target pixel. The size of the peripheral areas are controlled. The motion judging circuit may further includes a peripheral pixel comparing circuit (may be bypassed) for detecting motion at the pixel by checking polarities of the difference signal at an area around the target pixel and a majority detection circuit (may be bypassed) for detecting a majority of the results of the polarity deviation detection circuit to judge the motion with deviation to a side of stopping. The polarity deviation circuit may compensate the result of the peripheral pixel comparing circuit. W…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.