Video picture and waveform display with line selection
US5166791A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1991 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Sep 18, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video monitoring device displays on the same CRT screen a picture format video signal and a graphic format of one or more selected horizontal lines in the video signal, the selected line being highlighted in the picture format. An intensity modulator, and vertical and horizontal deflection modulators are coupled to the beam generator and to the deflection circuits, the modulators also being coupled to a control device for changing functions from picture format display to graphic format display as the beam is deflected in a raster pattern. A video memory stores at least the video information of the line to be displayed, for reading out the information in the graphic format. The control device outputs at least one control word for each horizontal line, to switch between the picture format, wherein luminance, saturation and hue are controlled by the amplitude, DC offset and frequency of the video signal, and the graphic format, wherein luminance is held constant and vertical deflection is modulated by the amplitude of the video signal during horizontal scanning, for producing the graphic display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.