Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1980-08-15
1983-01-18
Buczinski, S. C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358122, 358123, H04N 716, H04K 102
Patent
active
043694624
ABSTRACT:
A coding system for use in a television system wherein at least a part of a television signal is inverted by an encoder at a broadcasting station, according to a code signal and the coded television signal is decoded by decoders of specific subscribers to be reproduced on TV sets. The coding system is comprised of a clock oscillation means, a mode generating means for generating signals indicating plural inversion modes, a counter for counting clock signals from the clock oscillation means, a setting means for outputting a predetermined signal based on addresses provided corresponding to the respective inversion modes of the mode generating means and determined by an output from the counter, and a means for inserting the code signal during a vertical blanking period of the television signal. When the output signal of the mode generating means and the output signal of the setting means are in a given relation, the count value of the counter is used as the code signal.
REFERENCES:
patent: 4022972 (1977-05-01), Pires
patent: 4068264 (1978-01-01), Pires
patent: 4257065 (1981-03-01), Papay
Kanai Ryokichi
Osaka Hiroshi
Tomizawa Akimori
Buczinski S. C.
Clarion Co., Inc.
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