Software managed video synchronization generation
US4742350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1986 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Feb 14, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system to display an image including a first memory for storing picture data representing the image attribute data to qualify the picture data. The attribute data includes embedded synchronization data. The system further includes a circuit that produces the image by scanning the picture data qualified by the attribute data onto to a display in accordance with the synchronization data. This invention further provides for storing the synchronization data within the attribute data enabling the synchronization data to be programmable but only requiring update of the synchronization data when the synchronization data is to be changed. The memory includes two buffers wherein one buffer is loaded with attribute and synchronization data while the other buffer is being read. After the other buffer is read, the buffers are toggled such so that the loaded buffer is read to provide the attribute and synchronization data while the previously read buffer is loaded with new attribute and synchronization data. This invention further provides the linking of attribute and synchronization data in the memory to facilitate buffer loading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.