Method for processing video pictures and apparatus for processing video pictures
US6961379B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2001 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Aug 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/106
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
With the new plasma display panel technology new kinds of artifacts can occur in video pictures. These artifacts are commonly described as dynamic false contour effect, since they correspond to disturbances of grey levels and colors in the form of an apparition of colored edges in the picture when the observation point on the PDP screen moves. According to the invention such an artifact is compensated by analyzing the motion in the pictures assigning to each block of a picture a corresponding motion vector and performing a re-coding step in which a sub-field code word entry of a current pixel are calculated. For this purpose the motion vector is defined to point from a pixel in a previous picture to a pixel in the current picture. The sub-field code word entries for a current pixel (P8) are determined by dragging sub-field entries of the pixels lying on the motion vector trajectory. In this way for each pixel there is an exact calculation of the sub-field code word of a pixel also for complex moving trajectories like zoom and rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.