Cryptography – Key management – Having particular key generator
Patent
1991-09-20
1992-11-24
Buczinski, Stephen C.
Cryptography
Key management
Having particular key generator
307354, 307361, 328139, 328164, 258153, 380 17, H04N 7167
Patent
active
051669765
ABSTRACT:
An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal of a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.
REFERENCES:
patent: 3571730 (1971-03-01), Webb
patent: 4716588 (1987-12-01), Thompson et al.
patent: 4924498 (1990-05-01), Farmer et al.
Hunting C. J.
Phipps William L.
Raynesford Steven J.
Rittmueller Philip H.
Thompson John R.
Buczinski Stephen C.
NEC Home Electronics Ltd.
Ogonowsky Brian
Shoup Guy W.
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