Technique for the time frequency multiplexing on three televisio

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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370 50, H04N 708

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active

045890188

ABSTRACT:
The present invention relates to a technique for the Time-Frequency-Multiplexing (TFM) of three television signals. More particularly, three fields of a TV signal are sent simultaneously to a remote receiver by transmitting one field as is in the baseband of a standard television system signal while the other two fields are transmitted as differential signals, quadrature amplitude modulated onto a subcarrier frequency above baseband. The two differential signals can comprise two field differential signals or a frame and a field differential signal. Arrangements are also provided for transmitters and receivers for implementing the present technique.

REFERENCES:
patent: 3697682 (1972-10-01), Berg
patent: 4205339 (1980-05-01), Howe
patent: 4215370 (1980-07-01), Kirk, Jr.
Kiver, Milton S., "Color Television Fundamentals" 2nd edition McGraw-Hill, 1964; pp. 21-35.
Electronics Letters, vol. 9, No. 14, Jul. 12, 1973, "`Nearly Instantaneous` Digital Compander for Transmitting Six Sound-Programme Signals in a 2.048 Mbit/s Multiplex" by M. G. Croll et al., pp. 298-300.
BSTJ, vol. 60, No. 5, May-Jun. 1981, "Time-Frequency Multiplexing (TFM) of Two NTSC Color TV Signals-Simulation Results" by B. G. Haskell, pp. 643-660.
Int'l. Conf. on Communications Conference Record, vol. 2 of 4, Communications: The Expanding Resource, "Time-Frequency-Multiplexing (TFM) of Two NTSC Color TV Signals-Simulation Results" by B. G. Haskell, pp. 22.3.1-22.3.5.

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