Simultaneous display of interleaved windowed video information f

Details Simultaneous display of interleaved windowed video information f Simultaneous display of interleaved windowed video information f

1988-09-06

1991-07-30

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340723, 364518, G09G 514

Patent

active

050363158

ABSTRACT:
A first computer workstation running windowed display system and applications programs produces a first video signal of a composite, windowed, display plus a first data signal indicating the dedications, positions, and sizes of all windows. A second computer asynchronously digitally communicates a second display signal to a communications controller and then to a display controller. The display controller also receives the first data signal plus the sync pulse of the first video signal. It produces, from the second display signal, a second video display signal that (i) is synchronized with the first video signal and (ii) contains display information positioned and scaled to be within a window dedicated to the second computer. It produces a switch control signal indicating the portions of each raster scan of the synchronized video signals that are inside and outside the dedicated window. The switch control signal gates in a video switch either the first or the second video signal to a video monitor. The video monitor displays windows showing information from the first computer plus a dedicated window showing information from the second computer.

REFERENCES:
patent: 4653020 (1987-03-01), Cheselka et al.
patent: 4663617 (1987-05-01), Stockwell
patent: 4736309 (1988-04-01), Johnson et al.
patent: 4757441 (1988-07-01), Buckland et al.
patent: 4761642 (1988-08-01), Huntzinger
patent: 4859995 (1989-08-01), Hansen et al.
patent: 4890257 (1989-12-01), Anthias et al.

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