Scrambling system of television signal

Details Scrambling system of television signal Scrambling system of television signal

1984-02-17

1986-10-21

Buczinski, S. C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358124, H04N 7167

Patent

active

046188886

ABSTRACT:
A scrambling system of television signal includes a circuit for eliminating vertical sync pulses in a vertical sync pulse period and equivalent pulses in first and second equivalent pulse periods at opposite ends of said vertical sync pulse period. In place of the eliminated pulses, substitute pulses having a frequency equal to an integer times the frequency of horizontal sync pulses are deposited. A framing code inserting circuit is provided for inserting at least one framing code in the substituted pulses. The framing code is carrying information how the television signal is scrambled.

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patent: 4408225 (1983-10-01), Ensinger et al.
patent: 4424532 (1984-01-01), Toonder et al.
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patent: 4527195 (1985-07-01), Cheung
patent: 4533949 (1985-08-01), Fujimura et al.

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