| 摘要 |
<p>1. Method dor the phase regulation of motors in video recorders during the reproduction of vidéo signals recorded on a magnetic tape, using a phase comparison between a marking signal supplied by at least one mark applied to the head drum periphery and the control pulses recorded on a track of the magnetic tape, the desired phase of the control pulses being adjustable, characterized in that the head drum periphery comprises N marks and is subdivided into N region of equal size which are delimited by the marks and that curing a phase adjustment to a point P in a region n, with 1=< n =<N, the mark lying closest ot the point P' reflected centrally with respect to the head drum axis is used as reference for the phase measurement.</p> |
