Time base error corrector

Details Time base error corrector Time base error corrector

H - Electricity

04

N

350/51, 350/86,

H04N 5/04 (2006.01) H04N 5/95 (2006.01) H04L 7/033 (2006.01)

Patent

CA 1073096

TIME BASE ERROR CORRECTOR Abstract of the Disclosure A time base error corrector for correcting time base errors in recurrent information such as horizontal lines of a video signal by random selection of a delay line tap is disclosed. Incoming recurrent information groups are con- verted into impulse trains, in which the information is carried on the leading edges of the impulses, which are passed asynchronously through a delay line of plural cascaded digital gates having propagation delays which provide known tapped increments of delay as well as providing regenera- tion of each impulse passing therethrough. A digital counter is clocked at a rate corresponding to said delay increments and counts the time base error of a train as it counts down the taps of said line. The total reached in counting the time base error determines the tap through which the impulse train is output from the delay line. A restoration circuit then restores the original signal format to the corrected information group.

256280

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