Copy guard processing detecting apparatus

Details Copy guard processing detecting apparatus Copy guard processing detecting apparatus

1993-01-15

1994-08-09

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

380 5, 360 371, 348533, H04N 591

Patent

active

053371577

ABSTRACT:
A copy guard processing detecting apparatus which can correctly judge whether or not a copy guard is applied to an input video signal and prevents copy guard processing from being applied to a video signal to which a copy guard is not applied. The copy guard processing detecting apparatus comprises a first circuit for receiving an input video signal which includes a plurality of false synchronizing signals for prevention of duplication inserted in a vertical blanking interval thereof and for counting the number of the false synchronizing signals, a second circuit for counting the number of synchronizing signals in an image interval of the input video signal except the vertical blanking interval, and a discriminator for discriminating whether or not copy guard processing is applied to the input video signal from the count values of the first and second circuits.

REFERENCES:
patent: 4792852 (1988-12-01), Narusawa
patent: 4870297 (1989-09-01), Karlock
patent: 4907093 (1990-03-01), Ryan
patent: 4937679 (1990-06-01), Ryan
patent: 4951315 (1990-08-01), Switsen
patent: 5034981 (1991-07-01), Leonard
patent: 5133008 (1992-07-01), Fujita

Affiliated with

Also associated with

Rating

Copy guard processing detecting apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Copy guard processing detecting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Copy guard processing detecting apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-220219