Pick-up positioning apparatus for data playback apparatus

Details Pick-up positioning apparatus for data playback apparatus Pick-up positioning apparatus for data playback apparatus

1984-11-29

1987-02-24

Cardillo, Raymond F.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 41, 369 43, 369 44, 360 78, G11B 2108, G11B 2110

Patent

active

046462783

ABSTRACT:
A pick-up positioning apparatus for a recording disc playback apparatus such as a video disc player, comprising a control circuit, a memory circuit, a scanning mechanism for moving the pick-up of the playback apparatus along a radius of a recording disc mounted on the playback apparatus, and pick-up sensing circuit for producing signals to indicate the current pick-up position along that radial direction. When a disc is first set on the playback apparatus, the scanning mechanism moves the pick-up along the radial direction to thereby successively read out a number of addresses recorded on the disc, which are stored in the memory circuit together with corresponding position data. Subsequently, to search for a specified address position on the disc, the address stored in the memory circuit which is closest to the specified address is read out and the corresponding stored position data is used in moving the pick-up close to the specified address position.

REFERENCES:
patent: 4236232 (1980-11-01), Jansen et al.
patent: 4301526 (1981-11-01), Morii et al.

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