Method and apparatus for high rate concurrent read-write applications
US7511713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2004 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Jan 1, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0435
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The proposed technique provides simultaneous read and writes from a display controller using low-cost SDRAMs. This is achieved, in one example embodiment, by receiving a sequence of video frames at a first variable frame rate. A first video frame is then written in a first single-ported memory. The first video frame is then read from the first single-ported memory upon completing the writing of the first video frame in the first single-ported memory. The reading of the first video frame is then repeated from the first single-ported memory to maintain a second frame rate. The second frame rate is higher than the first variable frame rate. A second video frame is then written in a second single-ported memory upon completing the writing of the first video frame in the first single-ported memory such that the writing of the first video frame and the second video frame is at the first variable frame rate. The second video frame is then read from the second single-ported memory upon completing the writing of the second video frame in the second ported memory. The reading of the second video frame is then repeated from the second single-ported memory to maintain the second frame rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.