Adaptive progressive scan converter
US5081532A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Aug 30, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video system includes a scan converter for developing a progressively scanned display of video lines from a two field interlaced line system. Three video pixels are simultaneously supplied to a motion detector and a three dimension interpolator, the pixels corresponding to the pixel from the line above and the line below the pixel to be interpolated and to the corresponding pixel from the previous field. A motion coefficient for each interpolated pixel is stored in a field memory and the coefficient determined for the previous field interpolated pixel is consulted in developing motion factors for controlling multipliers in the three dimension interpolator. The interpolated pixel may thus be any porportion of the pixels on the line above, the line below and the previous field. An adaptive peaking and noise coring circuit is included. A spatial array of three lines of pixels, both real and interpolated, is developed and a horizontal, a vertical and two diagonal gradients between pair of pixels in the array are calculated. Logic circuitry and a maximum value decoder determine a peaking factor based upon the maximum gradient. A simplified adjustable noise coring circuit with symmetri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.