Method and apparatus for information retrieval from an...

Details Method and apparatus for information retrieval from an... Method and apparatus for information retrieval from an...

G - Physics

11

B

402/2, 402/9, 35

G11B 7/00 (2006.01)

Patent

CA 1140260

ABSTRACT A method and apparatus for selectably retrieving information from any of a plurality of spirally-formed information tracks formed in a videodisc by means of controlling a carriage for translating the videodisc in a forward or a reverse direction relative to radiant beam information recovery means in a videodisc player. Each information track is identified by a unique address and means are provided for selecting the address of a particular track to be retrieved. A prescribed sequence of drive signals is applied to a carriage motor dependent on the distance to be traveled by the carriage to retrieve the selected information, the drive signals being successively stepped downward to intermittently redeter- mine carriage motor speed as predetermined location thresholds are reached during carriage translation.

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