H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/17
H04J 3/08 (2006.01) H04L 7/04 (2006.01)
Patent
CA 1325296
ABSTRACT A receiver for selectively extracting one of two or more time division multiplexed channels of digital signals, which channel has been scrambled before multiplexing using a predetermined digital sequence comprising - a clock means arranged to provide clock pulses having a repetition rate dependent on a clock control signal; a digital sequence generator triggered by each clock pulse to provide a generator signal representative of the next digit in the predetermined digital sequence; a sampling means arranged to provide a sampled signal the clock pulse rate; and a phase lock means controlling the clock control signal whereby the generator sequence is delay - lockable to the sampled signal. The receiver finds particular application with the reception of digital video signals broadcast through a passive optical network.
577282
Faulkner David Wynford
Russ Dianne Margaret
British Telecommunications Public Limited Company
Shapiro Cohen
LandOfFree
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