Video signal processor
US4811097A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Oct 29, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, the video signal generator outputs a standardized analog video signal. The signal generator includes a clock controlling a sequential address generator. The address generator activates a memory device that is, for example, a ROM. A distortion conditioned standardized digital video signal is stored in the ROM. This distortion conditioned signal has distortion correction characteristics matching an output filter. Following the ROM is a D to A converter that converts the conditioned digital video signal into a conditioned analog video signal. A simple filter follows the D to A converter. The filter introduces distortion into the signal applied at its input but since that signal already has distortion correction characteristics therein, the distortion correction characteristics of the input signal match and substantially cancel the distortion introduced into that signal by the filter. Therefore, a standardized analog video signal is produced at the output of the filter. The real time video signal processor, in another embodiment of the present invention, utilizes a distortion correction operator in conjunction with a memory that introduces into the digital video sign…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.