| 摘要 |
<p>The electrostatic pick-up system is used for deriving signals which represent video program information stored on a video disc and are suitable for application to a television receiver to reproduce the video program. The pick-up itself has an increased bearing or tracking surface, leading to longer life and may be constructed to track within a single record groove or, alternatively, may bridge across and couple to a series of such grooves for radial tracking while presenting a probe in proper sensing relation to the groove that is to be sensed in any particular revolution of the disc. A generally similar arrangement omits mechanical coupling of the pick-up to the disc and, in its place, uses an electrical system to maintain radial tracking. This last-mentionend embodiment permits both stop frame and slow motion or other variable speed presentation of the image information stored in the disc.</p> |
