Digital video effects apparatus
US4873568A · kind A · utility
12Cited by
5References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Sep 19, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/272
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital video effects apparatus comprises an input for receiving a digital input video signal representing the distribution of optical information over a video field, and a key signal generator for providing a digital key signal that defines an area of the video field. A mask signal generator provides a digital mask signal that defines at least a portion of said area of the video field. The digital mask signal is combined with the digital key signal to provide a modified digital key signal, and the input video signal is acted on in accordance with the modified key signal to provide an output video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.