Patent ID: 9001213
Filing Date: 2015-04-07
Classification: H04N

Abstract:
1. Video signal waveform monitoring apparatus for receiving an input video signal composed of video lines, and whose level is to be monitored, the apparatus comprising: a video signal digitizer configured to sample the input video signal at video sample points, thereby generating a sequence of video pixel data, wherein the video signal digitizer is configured to interpolate the sampled input video signal to increase the number of video sample points, thereby increasing the temporal resolution of the video pixel data; an acquisition framestore organized into a video pixel array having rows corresponding to video lines and columns corresponding to video sample points, into which the sequence of video pixel data is written so as to represent a raster of the input video signal; a level analyzer configured to serially read video pixel data row-by-row from segments of the video pixel array, and configured to increment video level data at addresses in cache memory in response to the serially-read video pixel data, from which a sequence of video level data is generated; and an output framestore organized into a display pixel array, into which the sequence of video level data is written, and which when read for display represents the level of the waveform of the input video signal; wherein the segments of the video pixel array comprise at least one and less than all of the columns in the video pixel array, and the number of columns in the display pixel array is a fraction of the number of columns in the video pixel array.