Stop frame for optical playback system

Details Stop frame for optical playback system Stop frame for optical playback system

H - Electricity

04

N

352/32.2

H04N 5/76 (2006.01) G11B 7/09 (2006.01) G11B 17/00 (2006.01)

Patent

CA 1052005

ABSTRACT OF THE DISCLOSURE An optical playback system for reading video discs with a laser beam has a radial servo including an arrangement for developing a correction signal representing the sense and extent of deviations of the reading beam from proper tracking relation to the storage track of the video disc. A driver re- sponds to the correction signal and actuates a beam deflection mirror, displacing it in the proper sense and direction with respect to a reference position to maintain proper beam tracking. When stop frame operation is desired, a clamp is actuated once every revolution of the disc to supersede the correction signal and restore the beam deflecting mirror to its reference position as required to cause the beam to repeat its scan of a given convolution of the record track. -1-

224191

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