System and method for generating video in a computer system
US5790110A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1997 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Jan 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for generating composite video signals in a computer. Digital pixel data may be processed by software to form component video pixel data, which may include luminance and chrominance components. A chrominance look-up table is provided in a display memory and is used for modulation of the chrominance components. The modulated components are then combined to form digital composite video pixel data which may be stored in a frame buffer in the display memory. Video control information is precalculated and stored in the display memory in advance. The digital composite video pixel data and video control information are then recovered from the display memory to produce a formatted stream of video data. The architecture of this system greatly reduces hardware complexity and bandwidth requirements. In addition, the process may be controlled by a media stream controller which is also adapted for audio and graphics processing. This allows the display memory and various other components to be shared by multiple media subsystems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.