Apparatus for generating control signals of a video mixer system
US5040066A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1990 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Jan 9, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/262
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A memory for pixel factors has somewhat more than enough capacity for storing pixel factors for all the pixels of a television picture. A special effect pattern for use in fading from one input picture to another is stored in the memory either as a contour or as an area within a contour. Additional memory capacity is used for start addresses for shifting the pattern. The memory is read out line by line to provide a multiplier control signal for one video input of a mixer and a complementary multiplier control signal for another video input of a video mixer. While one set of pixel factor signals is read out from the memory it is possible to write in an increased or diminished pattern contour or area to provide special effect fading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.