Schaltung zur vertikalen Aperturkorrektur fuer Fernsehbildgeber

摘要

Production of a vertical aperture correction signal for studio-type television-image transmitters. A fist video signal Ao is delayed one video line period to produce a signal A1. These signals are compared to produce a signal A1-A0, which is passed through a low-pass filter and delayed another line period to produce a signal A2-A1. Signals A1-A0 and A2-A1 are compared to produce the correction signal.