Cryptography – Key management – Having particular key generator
Patent
1985-08-22
1989-01-03
Buczinski, Stephen C.
Cryptography
Key management
Having particular key generator
380 11, 380 20, H04N 7167
Patent
active
047962992
ABSTRACT:
A line rotation encoder for use with cable or pay television systems includes a storage unit having a storage capacity large enough to store only a single digitized video horizontal line of information, an address counter coupled to the storage unit and split-address circuitry for setting the address counter to an initial value. A comparator unit coupled to the address counter provides an end of line signal. As each encoded video sample is read out from a storage location addressed by the address counter, a digitized sample for a subsequent horizontal video line overwrites the value previously read out. When the encoded line has been completely read out, the next line is already stored in the storage unit.
REFERENCES:
patent: 4405942 (1988-09-01), Block et al.
patent: 4547802 (1985-10-01), Fogarty et al.
patent: 4563702 (1986-01-01), Heller et al.
patent: 4620224 (1986-10-01), Lee et al.
patent: 4642688 (1987-02-01), Lowry et al.
patent: 4691352 (1987-09-01), Arragon et al.
Buczinski Stephen C.
ITT Corporation
Peterson T. L.
Wallace Linda J.
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