Composite single video image system and method utilizing video peak storing memory

Claim 1

A video image forming system capable of producing an image consisting of information derived from a plurality of frames of video input signals, said video image forming system, comprising: input means for receiving, by frames, a composite video signal representative of an image and providing output data in analog form indicative of said frames of said composite video signal; analog-to-digtal converter means for receiving said output data from said input means and providing first output data in digital form indicative of said frames of said composite video signal; digital memory means having an input connected with said analog-to-digital converter means, said digital memory means selectively storing said first output data from said analog-to-digital converter means and providing said output data stored as second output data in digital form with said second output data not being applied to said input of said digital memory means; digital-to-analog converter means for receiving said second output data from said digital memory means and providing output data in analog form indicative thereof; output means connected with said digital-to-analog converter means for providing an output signal suitable for display represented by said second output data from said digital memory means; comparator means connected with said analog-to-digital converter means and said digital memory means for receiving said first and second output data in digital form from said analog-to-digital converter means and said digital memory means and effecting a comparison of said first and second output data; and control means connected with said analog-to-digital converter means and said digital-to-analog converter means to control converting of said output data, end connected with said digital memory means and said comparator means for initially enabling said first output data indicative of at least one frame of the composite video signal to be stored in said digital memory means so that said comparator means thereafter receives said first output data from said analog-to-digital converter means and said second output data from said digital memory means, with said first output data and said second output data being representative of a like number of frames and with said comparator means comparing predetermined corresponding parts of said first output data and said second output data, whereby, responsive to comparison of said first output data and said second output data by said comparator means, said control means enables said parts of said first output data representative of a value greater than that of said corresponding parts of said second output data to be stored in said digital memory means to replace corresponding parts of said output data stored in said digital memory means with said replacement being not limited to a single replacement occurrence.