Method of and apparatus for modifying a video signal to prevent

Details Method of and apparatus for modifying a video signal to prevent Method of and apparatus for modifying a video signal to prevent

1981-08-24

1986-02-18

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

358120, H04N 578, H04N 144

Patent

active

045716420

ABSTRACT:
An apparatus for modifying a video signal to protect the unauthorized recording and reproduction thereof is disclosed. In accordance with the invention, the video signal is modified in such a manner that insufficient vertical synchronization information is contained in some, but not all, of the vertical blanking intervals. Particularly, insufficient vertical synchronization information is contained in a sequence of vertical blanking intervals which will cause the rotational velocity of the tape head of the VTR to constantly vary.

REFERENCES:
patent: 3963865 (1976-06-01), Songer
patent: 4100575 (1978-07-01), Morio et al.
patent: 4213149 (1980-07-01), Janko

Affiliated with

Also associated with

Rating

Method of and apparatus for modifying a video signal to prevent 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 and apparatus for modifying a video signal to prevent , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and apparatus for modifying a video signal to prevent will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1553500