definition channel 38 or placed onto 35 mm film by an electron beam recorder 40 fig2 shows a system for the real time manipulation of image data the difference between this system and that of fig1 is that between the data splitters 20 and the data combiners 28 there exists a multi channel architecture comprising four post production processing units 24 with corresponding banks of high definition video tape recorders 22 and 26 it will be appreciated that the four post production processing units 24 must have a coordinated operation and so a controller 42 is provided to synchronise their operation for example if the post production processing unit is performing a fade or wipe operation then it is important that this should progress at the same rate for each of the split streams of data if distortion upon recombination is to be avoided fig3 illustrates a super high resolution frame of video data this is approximately four times the resolution of current high definition video two times horizontal and two times vertical and has 2007 horizontal lines each composed of 3840 pixels fig4 illustrates how the super high resolution frame of fig3 may be split into four two dimensional spatial frequency sub bands in this example the image is split into low and high frequency components both horizontally and vertically sub band 44 is the.