Picture-in-picture television receivers

Details Picture-in-picture television receivers Picture-in-picture television receivers

H - Electricity

04

N

350/56

H04N 5/45 (2006.01)

Patent

CA 1256983

ABSTRACT OF THE DISCLOSURE In a picture-in-picture television receiver, the subpicture signal is A-D converted; the converted digital subpicture signal is latched in response a subpicture clock in synchronism with a subpicture synchronizing signal; the latched signal is latched again and stored in an image memory in response to a main picture synchronizing signal; and the latched signal is read from the image memory in synchronism with the main picture synchronizing signal, in order that the subpicture can stably be inserted in a predetermined area of the main picture by eliminating the unstable data duration during which variation in the subpicture signal is different for each bit signal thereof.

520076

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