Capstan phase control method during slow playback and servo system for video cassette recorder adopting the same

摘要

A capstan phase control method during slow playback and the servo system of a VCR adopting the same, for phase-controlling a capstan motor so that a slow motion picture can be viewed without having noise during slow playback of the VCR. The capstan phase control method and the servo system employing the same, sets a sampling frequency of a reference control signal corresponding to desired slow playback on the basis of a head switching signal, judges whether a phase of the reference control signal having the set sampling frequency is identical with that of the control signal read via a head from the tape, and controls the phase of the capstan motor so that the phase of the read control signal is identical with that of the reference control signal on the basis of the judgement result. Accordingly, since the capstan motor can be phase-controlled and speed-controlled during slow playback, a tracking control can be performed so that noise does not appear on a screen. Thus, a slow motion picture without having noise can be provided.