Motion detection circuit and a noise suppressing circuit including the same
US6567468B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1999 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Sep 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/254
- 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. An Edge signal is generated from the video and delayed video signals. Motion in a target pixel is judged from the interframe difference signal according to the edge signal. 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 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; 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; and 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 polarity deviation circuit may compensate the result of the majority detection circuit. Width of the edge signal is controlled. A …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.