Digital synchronizing circuit insensitive to noise in a TV signa

Details Digital synchronizing circuit insensitive to noise in a TV signa Digital synchronizing circuit insensitive to noise in a TV signa

1990-11-20

1992-08-04

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358150, H04N 504

Patent

active

051363844

ABSTRACT:
A digital synchronizing arrangement for a picture display device includes a synchronizing signal separator stage in which horizontal sync pulses are derived from a digital television signal applied to the synchronizing arrangement and which includes a horizontal synchronizing signal. A phase-locked loop receives the horizontal sync pulses for its synchronization. For the purpose of suppressing signal disturbances, a pulse of a first switching signal derived from the phase-locked loop is generated each time at the expected instants of the horizontal sync pulses. Furthermore, a pulse of a second switching signal is generated each time in a predetermined time interval after each pulse of the first switching signal. The first horizontal sync pulse which occurs during a pulse of the first switching signal is applied to the phase-locked loop, whereas horizontal sync pulses subsequently occurring in the interval until the next pulse of the second switching signal are not applied to the phase-locked loop. All horizontal sync pulses subsequently occurring until the next pulse of the first switching signal are applied to the phase-locked loop if no horizontal sync pulse appeared during the pulse of the first switching signal.

REFERENCES:
patent: 4446482 (1984-05-01), Srivastava et al.
patent: 4639780 (1987-01-01), Willis
patent: 4683495 (1987-07-01), Brock
patent: 4737849 (1988-04-01), Bauduin
patent: 4872055 (1989-10-01), Teuling et al.
patent: 4954893 (1990-09-01), Urakami
patent: 4996596 (1991-02-01), Hirao et al.

Affiliated with

Also associated with

Rating

Digital synchronizing circuit insensitive to noise in a TV signa does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital synchronizing circuit insensitive to noise in a TV signa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital synchronizing circuit insensitive to noise in a TV signa will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-782602