Cryptography – Key management – Having particular key generator
Patent
1986-01-06
1988-03-15
Buczinski, Stephen C.
Cryptography
Key management
Having particular key generator
380 19, 380 36, H04N 7167, H04L 900
Patent
active
047318392
ABSTRACT:
There is described a method for coding and de-coding in an information-transmission system, particularly for pay-television, which comprises for coding, converting the input analog signal into a digital signal, treating said latter digital signal to impart thereto a form which makes the information content thereof unintelligible for normal receiving circuits, converting said signal back to an analog signal for transmitting same, and for receiving and de-coding, converting the input analog coded signal into a digital signal, treating said digital signal to return same to a form which makes said information content intelligible for normal receiving circuits, and finally converting the treated signal back to analog form for the use thereof. There is further described an apparatus for the working of this method.
REFERENCES:
patent: 4070693 (1978-01-01), Shutterly
patent: 4221931 (1980-09-01), Seiler
patent: 4443660 (1984-04-01), DeLong
patent: 4533949 (1985-08-01), Fujimura et al.
patent: 4575754 (1986-03-01), Bar-Zohar
patent: 4604650 (1986-08-01), DelCoco et al.
patent: 4605961 (1986-08-01), Frederiksen
Goray Eddy C.
Joris Pierre J.
Nelen Jean-Claude S.
Buczinski Stephen C.
Radio-Television Beige de la Communaute Francaise
LandOfFree
Method for coding and de-coding audio and video information 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 for coding and de-coding audio and video information, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for coding and de-coding audio and video information will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1930755