1. A method for reducing the transmission requirements of a system for transmitting image data to a display device, the image data representing a plurality of pixels defining an image for display on the display device, the image data being transmitted in a data stream and being in a predetermined order of pixel components, the method comprising the steps of: receiving the image data from the data stream; and transforming the image data as it is received by selectively storing some of the image data in a memory for access by the display device and discarding other of the image data.