05027212 is referenced by 142 patents and cites 5 patents.

A computer based video/graphics display system includes a computer system (22) having a graphics generator (24). A video signal from a video source (28) is fed through an input stage (26) to an asynchronous converter (30). The converter (30) synchronises the video signal to the graphics generator (24). The output from the asynchronous converter (30) and the output from the graphics generator (24) are fed to a fading/mixing matrix (34). The combined signal output from the fading/mixing matrix is fed to a computer display monitor (14). The system allows the mixing or windowing of computer graphics and a video image on a common display.

Title
Computer based video/graphics display system
Application Number
7/446924
Publication Number
5027212
Application Date
December 6, 1989
Publication Date
June 25, 1991
Inventor
Trevor R Stockill
Romford
GB
Victor G Halsted
Hempstead
GB
Dennis A Fielder
Cambridge
GB
Anthony P Marlton
Saffron Walden
GB
Agent
Flynn Thiel Boutell & Tanis
Assignee
Videologic
GB
IPC
H04N 5/262
H04N 5/272
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