Video preview system for allowing multiple outputs to be viewed simultaneously on the same monitor
US5189516A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1990 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Apr 23, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/2624
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multiple video preview system for a production video switcher or digital effects device compresses a plurality of input video signals taken from various points along a video path through the switcher or effects device. The compressed input video signals are stored in a display memory in respective designated regions. The display memory is read out in a raster scan manner. The readout of a portion of the display memory occurs simultaneously with the storing of the compressed input video signals occurs in another portion of the display memory to provide a realtime video output signal that includes each input video signal in a compressed form. The video output signal is input to a monitor to display the input video signals simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.