Scramble system for use in digital video signal recording and re

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

380 5, 380 20, 380 37, H04N 7167, H04K 104

Patent

active

055464610

ABSTRACT:
A scramble system of the present invention including a scramble apparatus and a descramble apparatus is applied to a recording and reproducing system or a transmission and receiving system wherein a frame of a digital video signal composed of a plurality of frames is divided into a plurality of predetermined fundamental video blocks corresponding to recording and reproducing processes. Either one of the recording and reproducing system and the transmission and receiving system executes a reconstruction process such as an interpolation process, a high speed playback process or the like. The scramble apparatus executes a scramble process on the inputted digital video signal in the identical processing manner using the fundamental video blocks in the identical position in each of the frames and generates a scrambled video signal, while the descramble apparatus effects reverse conversion of the scramble process executed by the scramble apparatus using the fundamental video blocks on the scrambled video signal generated by the scramble apparatus.

REFERENCES:
patent: 3958081 (1976-05-01), Ehrsam et al.
patent: 4635113 (1987-01-01), Okada et al.
patent: 4679078 (1987-07-01), Wong et al.
patent: 4679235 (1987-07-01), Okada et al.
patent: 4700388 (1987-10-01), Okada et al.
patent: 4742544 (1988-05-01), Kupnicki et al.
patent: 4815129 (1989-03-01), Griffin et al.
patent: 4817146 (1989-03-01), Szczutkowski et al.
patent: 5127021 (1992-06-01), Schreiber
patent: 5185794 (1994-02-01), Thompson et al.
patent: 5208857 (1993-05-01), LeBrat
patent: 5335275 (1994-08-01), Millar et al.
patent: 5377266 (1994-12-01), Katta et al.
Yamamitsu et al., "A Study on Trick Plays for Digital VCR" IEEE Transactions on Consumer Electronics, vol. 37. No. 3, pp. 261-266, Aug. 1991.
Heinz Griesshaber, "Managing Secure and Confidential Video Distribution " IEEE Transactions on Consumer Electronics, vol. 37, No. 3, pp. 220-223, Aug. 1991.
U.S. patent application Ser No. 08/197490 Uchida et al.
U.S. patent application Ser. No. 08/197490 Uchida et al.

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

Scramble system for use in digital video signal recording and re does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scramble system for use in digital video signal recording and re, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scramble system for use in digital video signal recording and re will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1055427

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