Digital video modulation and demodulation system

Details Digital video modulation and demodulation system Digital video modulation and demodulation system

1975-03-24

1976-11-23

Murray, Richard

Telegraphy

Systems

Simplex-reversing periodic

178DIG1, H04N 700

Patent

active

039938611

ABSTRACT:
In a television system, a digital video system permits the transmission of data along with the usual television picture. The television picture field includes one or more selectively addressable areas and the data is imprissed on these areas as digital, binary-coded brightness modulations at rates greater than the vertical field rate. At the receiving end of the system, the viewer positions one or more light sensors opposite these screen areas. The light sensors respond to the binary-coded brightness modulations by developing corresponding binary-coded digital electrical signals. The data stream from a light sensor can then be decoded by a demodulator/decoder operated by the viewer.

REFERENCES:
patent: 3369073 (1968-02-01), Scholz
patent: 3493674 (1970-02-01), Houghton
patent: 3663937 (1972-05-01), Bolner
patent: 3728480 (1973-04-01), Baer
patent: 3737566 (1973-06-01), Baer et al.
patent: 3743767 (1973-07-01), Bitzer et al.
patent: 3891792 (1975-06-01), Kimura
patent: 3900887 (1975-08-01), Soga et al.

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