Patent US 4,404,585

An improved single element sequential color system processes luminance information as high resolution signals and chroma information as low resolution signals. The system requires relatively much less data storage capacity than conventional systems. Sequential three-color systems are disclosed which utilize analog circuitry and which utilize digital circuitry to process the signals. Other embodiments disclose four-color systems wherein a primary color is followed two scans later by its complementary color. The complementary four-color systems provide unique addition and subtraction of the signals to process the chroma information. The four-color systems are shown which utilize analog signal processing and which utilize digital signal processing.