PROGRAMMABLE NONLINEAR SPEED CONTROLLER FOR RECORDER/REPRODUCER

摘要

A speed control for special motion reproducing of a video recording and reproducing apparatus is disclosed. The apparatus is of the type which has an automatic scan tracking servo (44) which controls the position of the reproduced heads carried by the scanning drum which are of the type which can be transversely moved relative to the longitudinal direction of recorded tracks so as to accurately follow the tracks during variable speed special effect reproducing modes. The nonlinear control controls the longitudinal tape speed through the capstan servo (34) and provides vernier control where it should be desirably located so that the operator can accurately control the special effect speeds. The nonlinear control also automatically compensates for changes in the speed and introduces a delay in the response to rapid changes that may occur at high speed special motion reproducing so that visually disturbing rapid changes in the video image will not be experienced by a viewer.