Video wipe processing apparatus
US4855834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1988 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Nov 17, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video processing system for generating an output sequence of video frames which, over time, a decreasing proportion of successive frames is derived from a first video input (21) and an increasing proportion of said frames is drived from a second input (22); an effect known as a wipe. A framestore (31) stores a frame of wipe-shape pixel signals wherein the value of each pixel represents the time at which the spacially corresponding output pixel is derived from the second video input signal. The wipe shape pixel signal are compared with a reference value, in response to which input signals are combined, and the reference value is adjusted between frames to create the wipe effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.