Abstract: A multiple output video camera employs a multi-tap memory access system, in which an image input DMA master writes frames of a source image at a maximum frame rate and maximum resolution, via an image bus and a memory controller, into an image memory. In the multi-tap multiple access memory system, a plurality of concurrent independent video output circuits, each possess an image bus input/output master coupled to the image bus; an independent video signal processing circuit; and an output circuit that provides an independently processed version of the sequential video images to a respective output port. The outputs can be digital or analog.

Abstract: A low-cost, high-speed system for converting high-grayscale-resolution image data to a grayscale resolution optimized for a particular output device, such as an LED bar or ink-jet printhead. A static random-access memory accepts at its address port a full image datum. The most significant digits of the datum relate to a look-up table selected for optimum performance in a given situation. The least significant digits of the datum represent the actual image datum. When the full image datum is applied to the address port, the address location identical to the full image datum outputs an output value which has been pre-loaded into the memory.