VHS Progressive Scan Output By adding VHS Progressive, a single set of component output can be used for both progressive DVD and VHS playback. It's never been easier to enjoy superior quality. Connecting and operation is more convenient since you don't need to switch TV inputs when changing between DVD and VHS. In order to enjoy images with improved edge detail and less flicker on your VHS tapes, the Time Base Corrector (TBC) produces images with superior quality by eliminating jitter contained in analog input signals.