Apparatus and method for generating on-screen-display messages using field doubling
US6480238B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1999 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Mar 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and concomitant method for generating an OSD message by constructing an OSD bitstream defining a single field of OSD data. The OSD bitstream contains an OSD header and OSD data. An OSD unit retrieves pixel control information from the OSD header which is programmed by a processor of a decoding/displaying system. The OSD header contains information including various pointers, that are used to provide instructions as to the treatment of the OSD data. If a top field pointer and a bottom field pointer are set to an identical value in the OSD header, then the OSD unit will repeat each OSD line in the other field for an OSD region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.