to the house timing reference. If the buffer over or underfills, the Frame Sync will hold the last good frame of video until another full frame's worth of video is received. Usually, this is undetectable to viewers. See also Drop-out compensator Frame synchronization (video) Video router Vision mixer Notes References A digital synchronizer for a video-tape recorder, Bucciarelli, F.V.; Proceedings of the IEEE, Volume 61, Issue 4, April 1973 Page(s):506 - 507 oldvcr.com Sony, Sony BVT-800, Professional Timebase Corrector oldvcr.com FOR.A FA-410, Professional Timebase Corrector Film and video technology Television technology Television terminology Videotape