Sync generator unit and field decision unit using it

Details Sync generator unit and field decision unit using it Sync generator unit and field decision unit using it

1998-01-22

2000-08-08

Powell, Mark R.

Television

Synchronization

Sync separation

348521, 348525, 348531, 348536, H04N 506, H04N 512

Patent

active

061009350

ABSTRACT:
A field decision unit capable of solving a problem involved in a conventional field decision unit in that an internal synchronizing signal can be erroneously synchronized with the equalizing pulses of a video signal owing to noise because the output halt period of a phase comparator is set rather short considering that this will facilitate the synchronization of the internal synchronizing signal with the video signal when starting the system or the like, and hence an incorrect field decision can be made. The present field decision unit includes an output controller which sets output halt pulses with a longer output halt period in a particular interval consisting of the synchronizing cycles containing the equalizing pulses and a synchronizing cycle previous thereto, and which employs output halt pulses with a shorter output halt period outside the particular interval as in the conventional system.

REFERENCES:
patent: 4642682 (1987-02-01), Orsburn
patent: 4947264 (1990-08-01), Narusawa
patent: 5298998 (1994-03-01), Furumiya et al.
patent: 5414470 (1995-05-01), Hotta et al.
patent: 5473387 (1995-12-01), Okada et al.
patent: 5485208 (1987-02-01), Mabuchi
patent: 5748252 (1998-05-01), Draves
patent: 5875002 (1999-02-01), Nishiyama

Affiliated with

Also associated with

Rating

Sync generator unit and field decision unit using it does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sync generator unit and field decision unit using it, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sync generator unit and field decision unit using it will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1155334