Encoder and decoder

Details Encoder and decoder Encoder and decoder

1995-08-09

1998-11-17

Barron, Jr., Gilberto

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 49, 386112, H04N 764

Patent

active

058387919

ABSTRACT:
The present invention was made in order to provide a technology capable of safely ciphering compressed and encoded image data irrespective of lines or media and carrying out a correct decoding operation without any shifts in the frames of ciphered moving pictures.
Further, so as to prevent giving any means of encoding from comparison of image ciphered data and so as to generate totally different ciphered image data from the same data compressed images, a processing is executed not on an ECB mode but on such modes as CBC, CFB, OFB or the like. Moreover, as an initial vector, information different for frames included in a header, that is, time information from the start of an image or a frame sequential number, is used. In this way, even if compressed images within adjacent frames are accidentally the same, totally different ciphered data can be obtained.

REFERENCES:
patent: 4247106 (1981-01-01), Jeffers et al.
patent: 4439670 (1984-03-01), Basset et al.
patent: 4446519 (1984-05-01), Thomas
patent: 4484217 (1984-11-01), Block et al.
patent: 4558176 (1985-12-01), Arnold et al.
patent: 4590557 (1986-05-01), Lillie
patent: 4646234 (1987-02-01), Tolman et al.
patent: 4649510 (1987-03-01), Schmidt
patent: 4654799 (1987-03-01), Ogaki et al.
patent: 4658093 (1987-04-01), Hellman
patent: 4672554 (1987-06-01), Ogaki
patent: 4674055 (1987-06-01), Ogaki et al.
patent: 4740890 (1988-04-01), William
patent: 4780905 (1988-10-01), Crutis et al.
patent: 4787050 (1988-11-01), Suzuki
patent: 4816653 (1989-03-01), Anderl et al.
patent: 4816654 (1989-03-01), Anderl et al.
patent: 4817140 (1989-03-01), Chandra et al.
patent: 4864516 (1989-09-01), Gaither et al.
patent: 4879645 (1989-11-01), Tamada et al.
patent: 4949257 (1990-08-01), Orbach
patent: 4999806 (1991-03-01), Chernow et al.
patent: 5006849 (1991-04-01), Baarman et al.
patent: 5008814 (1991-04-01), Mathur
patent: 5014234 (1991-05-01), Edwards, Jr.
patent: 5016009 (1991-05-01), Whiting et al.
patent: 5051822 (1991-09-01), Rhoades
patent: 5056009 (1991-10-01), Mizuta
patent: 5103392 (1992-04-01), Mori
patent: 5103476 (1992-04-01), Waite et al.
patent: 5161194 (1992-11-01), Ujiie
patent: 5166886 (1992-11-01), Molnar et al.
patent: 5181107 (1993-01-01), Rhoades
patent: 5199066 (1993-03-01), Logan
patent: 5214697 (1993-05-01), Saito
patent: 5222134 (1993-06-01), Waite et al.
patent: 5245330 (1993-09-01), Wassink
patent: 5267171 (1993-11-01), Suzuki et al.
patent: 5461618 (1995-10-01), Chen et al.
patent: 5479299 (1995-12-01), Matsumi et al.
patent: 5535275 (1996-07-01), Sugisaki et al.
patent: 5546461 (1996-08-01), Ibaraki et al.
patent: 5600721 (1997-02-01), Kitazato
Japanese Patent Laid-Open Publication No. 57-127249, Aug. 7, 1982 (equivalent to Japanese Patent Publication No. 61-22815).
Japanese Patent Laid-Open Publication No. 5-89363, Apr., 1993.
Japanese Patent Laid-Open Publication No. 5-266575, Oct. 15, 1993.
Japanese Patent Laid-Open Publication No. 5-298085, Nov. 12, 1993.
Japanese Patent Laid-Open Publication No. 6-95871, Apr. 8, 1994.

Affiliated with

Also associated with

Rating

Encoder and decoder does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-893044