Video transition circuitry including transition previewing means
US4205346A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1978 |
| Grant date | May 27, 1980 |
| Priority date | — |
| Expiry date | Jun 9, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/031
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Improved video transition circuitry including circuitry for previewing transitions from an on-air event signal to a next event signal. The circuitry includes a program transition switch responsive to the on-air event and next event signals for outputting the on-air event signal; a preview transition switch respnsive to the on-air event and next event signals for outputting the next event signal; transition control circuitry for either (a) controlling the program transition switch to effect a predetermined transition at the output of the program transition switch from the on-air event signal to the next event signal or (b) controlling the preview transition switch to effect a preview of the predetermined transition at the output of the preview transition switch where the predetermined transition may be, for example, a dissolve, a wipe or a bordered wipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.