Scanning conversion circuit
US7092032B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2000 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Mar 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0414
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanning conversion circuit which interpolates an image signal of an interpolation scanning line from an input image signal Vi of a scanning line adjacent to the upside or downside of an interpolation scanning line to output an image signal Vp doubled in scanning line, and which comprises a directivity detection unit (50) for detecting, in order to prevent an unnatural view of a slant line when a moving image is displayed with an image signal Vp, a direction having the strongest correlation out of a plurality of directions, including a vertical direction and a slant direction, centering on an interpolation point of an interpolation scanning line based on the signal Vi, and an average value computing unit (56) for computing an average value of image signals at two sampling points corresponding to the detected direction out of a plurality of sampling points in an upside scanning line and downside scanning line. When the directivity detection unit (50) judges that a slant-direction correlation is the strongest, the average value computing unit (56) computes an average value of image signals at corresponding and slant-direction two sampling points in an upside scanning line and downs…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.