Patent ID: 6636205
Filing Date: 2003-10-21
Classification: G09G

Abstract:
In a video data acquisition system in which an analog-to-digital converter employs sampling clock pulses to sample and digitize pixels in a video signal frame including a number Y of video scan lines each initiated by a horizontal sync pulse, each video scan line including an unknown number n of total pixels and a number X of viewable pixels in an active video region bounded by blanking regions, an improved method of determining the number n of total pixels in a video scan line, comprising:determining an active video region time period; determining a video scan line time period; computing a proportion of the active video region time period to the video scan line time period; computing the number n of total pixels by dividing the number X of viewable pixels by the proportion; setting a number of sampling clock pulses per video scan line to equal the number n of total pixels in a video scan line; and carrying out the improved method during a signal frame period.