the color difference and luminance signals are then applied to ntsc encoder 49 wherein a composite color television signal is generated by known techniques it has been found that it is satisfactory not to gamma correct the high passed signal such as needed for the low passed chrominance signals the electronic processing for the pattern of fig4 a as shown in fig7 a has been extensively simulated and shown to yield excellent performance for the pattern of fig4 b a processing method similar to fig7 a has also been simulated noticeable improvements with respect to fig4 a in the signal to noise ratio about 3 db and aliasing along diagonals were demonstrated in the simulation fig1 shows a circuit for analog decoding of the pattern of fig4 b wherein elements corresponding to elements in fig7 a have been given corresponding reference numerals since the operation is similar to that of fig7 a it will be briefly described the three independent color component signals c 1 c 2 and c 3 are obtained in the following way first two weighted sum signals of neighboring elements are formed by adders 64 and 68 amplifier 66 and difference amplifier 70 signal a is the weighted sum of neighboring elements having weights 1 2 1 and signal b is.