Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1987-01-12
1987-12-01
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
358 86, 358349, 380 10, 380 12, H04N 7167
Patent
active
047109564
ABSTRACT:
A cable television system and method in which each subscriber's converter is located outside the subscriber's premises in an external control unit ("ECU") which also includes several other subscribers' converters. The ECU includes common signal processing circuitry for controlling all the converters in the ECU. In addition to television signals, the cable network transmits control and data signals in both directions between the ECU and the head end of the system and between the ECU and each subscriber. Each subscriber supplies a portion of the power required by the associated ECU. Multiple television channels can be supplied to each subscriber via a single drop cable connecting the subscriber to the ECU.
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American Television & Communications Corporation
Buczinski Stephen C.
Ingerman Jeffrey H.
Rogers Laurence S.
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