Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1978-05-30
1980-01-08
Richardson, Robert L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 35, 358 41, 358210, H04N 904, H04N 944
Patent
active
041830440
ABSTRACT:
The remote control of the subcarrier phase at each of a plurality of television cameras is provided by a digital encoder located near a remote monitor and camera switching network location. The encoder transmits binary coded signals to a color subcarrier phase shifter in the separate cameras. For the coarse phase selection, a first binary code signal selects a tap point along a delay line. For fine phase selection, a second binary code signal is decoded to provide D.C. voltage amplitude levels. These D.C. voltage levels are applied to a pair of comparators. The output from the tapped delay line is also applied to the comparators. The phase of the output from the comparators is advanced or retarded in direct correspondence to the amplitude level and polarity of the D.C. voltages applied to the comparators.
REFERENCES:
patent: 2808455 (1957-10-01), Moore
patent: 3215774 (1965-11-01), Ikegami
patent: 3463962 (1969-08-01), Bazin
patent: 3670181 (1972-06-01), Pauly
patent: 3916436 (1975-10-01), Mavey et al.
ABU Tech. Rev. (Japan), No. 37, Mar. 1975, pp. 15-23.
Rasmussen Paul J.
RCA Corporation
Richardson Robert L.
Troike Robert L.
Whitacre Eugene M.
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