Method and apparatus for shuffling and deshuffling video signals

摘要

This invention teaches a video line shuffling method wherein video line displacement is variable and controlled depending upon the distortion in a given system. A series of permutations is applied to the original picture such that lines are shuffled in a controlled manner to achieve line displacement within a desired range. Memory requirements are minimized by utilizing a method whereby a single memory has data written into locations which were read from in a previous step. Where DRAM is utilized for the memory, a write method is employed to eliminate the need for strobing the rows and columns DRAM.