Rapid signal acquisition and phase averaged horizontal timing fr

Details Rapid signal acquisition and phase averaged horizontal timing fr Rapid signal acquisition and phase averaged horizontal timing fr

1987-04-13

1989-06-27

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358149, H04N 504

Patent

active

048434698

ABSTRACT:
A circuit for extracting phase averaged horizontal timing with high noise immunity and for rapidly acquiring a video signal from a composite synchronizing signal generates an output signal at the horizontal sync rate, the output signal having leading edges occurring at the leading edges of the horizontal sync pulses of the composite synchronizing signal. The rate of the output signal is phase averaged by comparing the respective leading edges of the output signal and the composite synchronizing signal within a window centered about the leading edges of the output signal. Difference in the phases of the respective leading edges result in an error signal which is used to adjust the rate of the output signal to obtain coincidence of the respective leading edges. The occurrence of the leading edges of the composite synchronizing signal within the window is used to lock the circuit. Failure of the leading edges of the composite synchronizing signal to occur within the window due to a change in video source results in unlocking the circuit and resetting the output signal to a new composite synchronizing signal.

REFERENCES:
patent: 4092672 (1978-05-01), Aschwanden

Affiliated with

Also associated with

Rating

Rapid signal acquisition and phase averaged horizontal timing fr does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rapid signal acquisition and phase averaged horizontal timing fr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rapid signal acquisition and phase averaged horizontal timing fr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-817559