05594467 is referenced by 70 patents and cites 40 patents.

A computer based video/graphics display system includes a computer system having a graphics generator. A video signal from a video source is fed through an input stage to an asynchronous converter. The converter synchronizes the video signal to the graphics generator. The output from the asynchronous converter and the output from the graphics generator are fed to a fading/mixing matrix. The combined signal output from the fading/mixing matrix is fed to a computer display monitor. The display monitor is synchronized to the graphics generator, and the video signal is input asynchronously. Circuitry is provided for displaying at least a portion of the video image together with the graphics image on the display. One or more video images can be manipulated, stored, and displayed in window areas on the display monitor. A picture can be built-up by combining several still images. The system allows the mixing and windowing of computer graphics and one or more video images together on the screen.

Title
Computer based display system allowing mixing and windowing of graphics and video
Application Number
446924
Publication Number
5594467
Application Date
May 30, 1991
Publication Date
January 14, 1997
Inventor
Trevor R Stockill
Essex
GB
Victor G Halstead deceased
late of Essex
GB
Dennis A Fielder
Cambridge
GB
Anthony P Marlton
Essex
GB
Agent
Curtis Morris & Safford P C
Agent
Gregor N Neff Esq
Assignee
Video Logic
GB
IPC
G09G 1/06
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