Method and system for using single OSD pixmap across multiple video raster sizes by chaining OSD headers
US7202912B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2001 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Oct 17, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0122
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A TV system that uses a single pixmap across multiple video rasters having different raster sizes. In general, the TV system uses at least two sets of headers to select different portions of a single pixmap to be displayed based on different raster sizes. Specifically, each of the headers in a header set points to a pixel line to select number of pixels for that pixel line. The number of the headers in a header set determines the height of the pixmap and the pixel number selection by a set of headers determines the width of the pixmap. In response to different displaying modes, the TV system selectively invokes one of the two header sets to select different portions of the single pixmap. By doing so, a single pixmap can be used across multiple video rasters having different raster sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.