Apparatus for synchronizing a source of computer controlled...

Details Apparatus for synchronizing a source of computer controlled... Apparatus for synchronizing a source of computer controlled...

H - Electricity

04

N

352/18, 350/3, 3

H04N 7/00 (2006.01) H04N 5/073 (2006.01)

Patent

CA 1207884

Abstract of the Disclosure Synchronization of a source of computer controlled video to a video disc player for interactive application is obtained by sensing when the computer vertical sync leads that of the player and gating out a number of computer clock pulses equaling one video line during a period of one or more video lines. Horizontal synchronization is disabled during the vertical acquisition mode and then is established by modulating the computer clock frequency with a line rate phase error signal obtained from both video sources thereby providing rapid synchronization within approximately two seconds under worst case conditions.

461555

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