Method and apparatus for information retrieval from an optically readable storage medium
USRE32574E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1985 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Sep 9, 2005 |
Classification
- Technology area (CPC —)General
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.