Switching video streams for a display without a visible interruption
US8730251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2010 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Dec 26, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/395
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosed embodiments provide a system that facilitates driving a display in a computer system. During operation, the system receives an input video stream from a graphics source. The system directs the input video stream through a front memory buffer and a back memory buffer to produce an output video stream. While directing the input video stream through the set of memory buffers, the system writes a video frame from the input video stream into the back buffer, and concurrently drives the output video stream from a preceding video frame in the front buffer. When the writing of the video frame completes, the system switches buffers so that the back buffer becomes the front buffer, which drives the output video stream, and the front buffer becomes either a spare buffer or the back buffer, which receives a subsequent frame from the input video stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.