Video games color synthesis

In combination with a color television receiver including image display means and means for processing a color television signal having a signal component containing color information to be displayed and a color synchronizing subcarrier signal component, apparatus for synthesizing said color information comprising:

• means for providing an alternating signal at the frequency of said subcarrier signal;
• means for deriving a plurality of reference signals in quadrature phase relationship from said alternating signal;
• a plurality of signal gating means each having a signal input terminal, a signal output terminal, and a switching control input terminal;
• a plurality of means for combining said reference signals at respective input terminals of said gating means in selected proportions, said combining means each including first and second signal weighting impedances for coupling said reference signals to said input terminals, the values of said impedances of each combining means being mutually proportioned such that a combined signal developed at each said input terminal exhibits a resultant phase corresponding to the phase of a desired color information signal;
• control means coupled to said switching control input terminals of said gating means for selectively enabling said gating means to conduct respective combined color representative signals from said input terminal to said output terminal at appropriate times during intervals corresponding to line scanning intervals of said television signal;
• signal translating means for receiving signals conducted by said gating means;
• and
• means for coupling signals from said signal translating means to said signal processing means of said color television receiver.

Apparatus for synthesizing color signal information corresponding to color information contained in the chrominance component of a color television signal also including a color synchronizing chrominance subcarrier component, said apparatus comprising:

• means for providing an alternating signal at the frequency of said subcarrier signal;
• means for deriving a plurality of reference signals with mutually different phases from said alternating signal;
• a plurality of signal gating means each having a signal input terminal, a signal output terminal, and a switching control input terminal;
• a plurality of means for combining selected ones of said reference signals at respective input terminals of said gating means in selected proportions, said combining means each including first and second signal weighting impedances for coupling said selected reference signals to said input terminals, the values of said impedances of each combining means being mutually proportioned such that a combined signal developed at each said input terminal exhibits a resultant phase corresponding to the phase of a desired color signal;
• control means for providing control signals to said switching control input terminal of said gating means for selectively enabling said gating means to conduct respective combined color representative signals from said input terminal to said output terminal at appropriate times during intervals corresponding to line scanning display intervals of said television signal;
• utilization means for receiving signals conducted by said gating means;
• and
• means coupled to said output terminals of said gating means for bypassing alternating signals appearing at said output terminals to a point of reference potential in response to a control signal from said control means indicative of a monochrome signal condition, so that said utilization means receives substantially no alternating reference signals from said gating means under monochrome signal conditions.