Method and apparatus for controlling expanded sweeps
US5502511A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1994 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Dec 5, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/223
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus provides sweep control signals for an expanded display of a selected portion of a television signal. A first counter is preloaded with a number related to the position of the left hand edge of the selected portion of the waveform being monitored and a second counter is preloaded with a number related to the position of the right hand edge of the selected portion of the waveform. Clock pulses are counted by the first counter until the number preloaded therein is reached and then the second counter counts the clock pulses until the number preloaded therein is reached. Control signals are developed when each of the counters has counted the number preloaded therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.