User-addressing method and receiver in an authorized access tele

Details User-addressing method and receiver in an authorized access tele User-addressing method and receiver in an authorized access tele

1995-12-05

1999-06-15

Buczinski, Stephen C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

348 1, 348 2, 348 3, 455 2, H04N 7167, H04N 700, H04B 1700

Patent

active

059129719

ABSTRACT:
A collective address is defined at the transmitter end, not only by the contents of a field of bits, but also by a compulsory position of said field in a word which is larger than said field. Said word is full of zeros, outside said field.
To recognize in a receiver whether a message received from the transmitter is concerned,

REFERENCES:
patent: 3230302 (1966-01-01), Bruck et al.
patent: 4268859 (1981-05-01), Ost
patent: 4292650 (1981-09-01), Hendrickson
"Conditional Access Broadcasting :Datacare 2", BBC Research Dept. Report, No. 10, Aug. 1988, No. 10. D.T. Wright, C. Eng.

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