Method and apparatus for information retrieval from an optically

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

1981-08-24

1983-02-22

Faber, Alan

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

365234, 360 722, 358342, 369 44, 369111, G11B 700, G11B 1700

Patent

active

043750915

ABSTRACT:
A method and apparatus for selectably retrieving information from any of a plurality of spirally-formed information tracks formed in a video disc by means of controlling a carriage for translating the video disc in a forward or a reverse direction relative to radiant beam information recovery means in a video disc 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 redetermine carriage motor speed as predetermined location thresholds are reached during carriage translation.

REFERENCES:
patent: 3654624 (1972-04-01), Becker
patent: 3851116 (1974-11-01), Cannon
patent: 3927252 (1975-12-01), Polley
patent: 3931457 (1976-01-01), Mes
patent: 4106058 (1978-08-01), Romeas
patent: 4138663 (1979-02-01), Lehureau
patent: 4142209 (1979-02-01), Hedlund
"A Review of the MCA Disco-Vision System", by Broadbent, Jul. 1974 Journal of SMPTE, vol. 83, pp. 554-559.
"A Random Access System Adapted for the Optical Videodisc" by Mathieu-Journal of SMPTE, Feb. 1977, vol. 86, pp. 80-83.

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