Method of automatically measuring the horizontal scan frequency

Television – Basic receiver with additional function – Multimode

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

348531, 348194, H04N 508, H04N 504, H04N 701

Patent

active

RE0365084

ABSTRACT:
A method of automatically measuring the horizontal scan frequency of a composite synchronism signal, comprising horizontal synchronization impulses at line frequency, consists of first performing a count of a number of impulses having a repeat frequency higher than said line frequency, as intervening between two successive impulses at line frequency.
The count value, corresponding to said number of impulses, is stored to obtain the line frequency of the signal, and thereafter, a series of down counts is effected, as initiated at predetermined times, until a change of frequency of the signal is detected.

REFERENCES:
patent: 4353091 (1982-10-01), Hoppe
patent: 4402011 (1983-08-01), Newton
patent: 4561021 (1985-12-01), Abe
patent: 4672449 (1987-06-01), Kraus et al.
patent: 4675734 (1987-06-01), Widom
patent: 4769704 (1988-09-01), Hirai et al.
patent: 4792852 (1988-12-01), Narusawa
patent: 4812906 (1989-03-01), Wolber
patent: 4954893 (1990-09-01), Urakami
patent: 4999708 (1991-03-01), Aoki et al.
patent: 5003392 (1991-03-01), Wischermann

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method of automatically measuring the horizontal scan frequency does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of automatically measuring the horizontal scan frequency , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of automatically measuring the horizontal scan frequency will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-556497

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.