Copy prevention method and apparatus for digital video system

Details Copy prevention method and apparatus for digital video system Copy prevention method and apparatus for digital video system

1995-11-22

1998-06-02

Cangialosi, Salvatore

Cryptography

Cryptanalysis

380 20, H04L 900

Patent

active

057613028

ABSTRACT:
A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream; (b) decrypting and transmitting the bit stream to which the header area is added; (c) detecting a key field of the decrypted and transmitted bit stream and detecting copy prevention information; and (d) encrypting the bit stream according to information detected form step (c) and recording it on tape.

REFERENCES:
patent: 4937679 (1990-06-01), Ryan
patent: 5054064 (1991-10-01), Walker et al.
patent: 5303294 (1994-04-01), Kimoto et al.
patent: 5315448 (1994-05-01), Ryan
patent: 5406625 (1995-04-01), Kotaka et al.
patent: 5477276 (1995-12-01), Oguro
patent: 5513260 (1996-04-01), Ryan
patent: 5546461 (1996-08-01), Ibaraki et al.
patent: 5576843 (1996-11-01), Cookson et al.

Affiliated with

Also associated with

Rating

Copy prevention method and apparatus for digital video system 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 prevention method and apparatus for digital video system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Copy prevention method and apparatus for digital video system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1470169