Abstract: A method and apparatus for converting an input video signal having P input lines, P being an integer much greater than one, into an output video signal having Q output lines, Q being an integer much greater than one but different than P. The conversion is preferably carried out using a linear interpolation method wherein the video information in the input signal is evenly distributed throughout the video output signal. The input lines are stored in small groups of M input lines and the output signal is generated in groups of N output lines. Each group of output lines is generated shortly after the receipt of an associated group of input lines.

Abstract: Images and respectively associated timing marks are arrayed, as phototransparencies, about a disk. The disk is rotated and the timing marks are sensed. Display occurs either in two-dimensional fashion, such as in a television system, or in three-dimensional fashion such as in a semitransparent full image projection. Associated logic circuitry determines whether the full 3-D transparency is to be produced, in which case all images on the disk are to be illuminated, or whether swim through will occur, either on an image at a time or on a "ham slice" projection basis.