Multi-mode video standard selection circuit and selection method
US5157495A · kind A · utility
10Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A first embodiment of the present invention provides logic to select between one of three or more user entered video standards and one or more selectable default video standards. The logic overrides the default standard with the user selected standard. A second embodiment includes a state machine that sets a mode output to a default standard from among two or more standards specified at the factory using jumper pins. The state machine can step through the two or more available standard modes, thereby changing the picture displayed to the user and, as desired, allowing the user to indicate what standard should be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.