Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1979-04-30
1980-10-21
Richardson, Robert L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
273 85R, 358 82, H04N 9535
Patent
active
042297605
ABSTRACT:
A color signal synthesis network suitable for use in a video games system includes a source of four mutually quadrature phased reference signals derived from a common source, a plurality of color signal transmission gates, and a plurality of resistive weighting and combining networks for coupling selected ones of the quadrature signals to an input of each gate. The values of resistors forming each weighting network determine the ratio of the amplitudes of the selected quadrature signals coupled thereby. The signals coupled by the weighting resistors are combined at the input of each gate to produce a resultant synthesized color signal having a color determining phase which is established by the vector sum of the weighted signal amplitudes. Each gate is enabled at appropriate times during each image scanning interval in response to applied control signals, to conduct the associated synthesized color signal to succeeding composite video signal encoding and processing circuits.
REFERENCES:
patent: 3972067 (1976-07-01), Peters
patent: 4068847 (1978-01-01), Lukkarila et al.
patent: 4139863 (1979-02-01), Tuma
Electronics, pp. 89-96, Jun. 24, 1976.
Kurdyla Ronald H.
Meagher William H.
RCA Corporation
Richardson Robert L.
Whitacre Eugene M.
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