Apparatus for encoding of information

Details Apparatus for encoding of information Apparatus for encoding of information

1980-03-26

1983-08-02

Buczinski, S. C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358123, 358120, H04N 716, H04K 104

Patent

active

043969470

ABSTRACT:
A composite video signal containing an information portion and a synchronization pulse is encoded by shifting the level of the synchronization pulse and also by inverting the information portion. The encoding is switched on and off at a randomly chosen frequency, under the control of random number generator enabled at regular intervals. The encoded signal is transmitted with a data signal representing the random number so that a receiver can decode the received signal. The transmitted data can include details of undesired recipients, to disable their decoders. Applied to a pay TV system, the transmitted data can include the rate to be charged for the program and a billing mechanism at the receiver will meter the appropriate charge.

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