Transmission of data with a video signal

Details Transmission of data with a video signal Transmission of data with a video signal

1981-03-23

1983-08-02

Buczinski, S. C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358122, 358119, 358123, H04N 716

Patent

active

043969461

ABSTRACT:
The horizontal line synchronizing pulses of a video signal are selectively replaced with a video signal blanking level in dependence upon bits of data, whereby the data is transmitted with the video signal. Such data transmission is particularly applicable to a pay TV system in which the video signal is scrambled, because the selective absence of horizontal line synchronizing pulses enhances the video signal scrambling. In this case the data can comprise information relating to the scrambling of the video signal.

REFERENCES:
patent: 3313880 (1967-04-01), Bass
patent: 4112252 (1978-09-01), Liebler
patent: 4222068 (1980-09-01), Thompson
patent: 4338628 (1982-07-01), Payne et al.

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