Processing of video image signals
US4918530A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1989 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Aug 25, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/2625
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video image processing system for generating so-called "multi-freeze" digital video effects comprises a frame store (14) within which an image signal can be stored for application to a combining circuit (4) together with a background image signal (1) providing a background against which a trail of frozen images is to be displayed. The trail of images is derived by recycling images stored in the memory (14) through a further combining circuit (19) wherein the stored image is combined with incoming image signals applied to both combining means (4,19). Decay and patterning of the frozen images can be effected by circuits (24,25) for attenuating and profiling the key signals accompanying the image signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.