Correlation of a waveform to a video image
US5343298A · kind A · utility
Inventors
Key dates
| Filing date | Aug 24, 1992 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Aug 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Correlation between a waveform displayed on a waveform display device and the corresponding portion of a video image displayed on a monitor is achieved by brightening a portion of a video input signal from which the waveform and video image are produced. A horizontal sweep signal is compared with voltages representing the left and right edges of the waveform display device screen to determine the portion of the video input signal that is "on-screen". The on-screen signal is combined with a line select signal to produce a control signal. The control signal is used to level shift the video input signal to provide a "bright-up" feature as part of the video image on the monitor, indicating the portion of the video image being displayed as a waveform on the screen of the waveform display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.