Method and apparatus for identifying the type of servo system to

Details Method and apparatus for identifying the type of servo system to Method and apparatus for identifying the type of servo system to

1988-05-23

1990-12-11

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 58, G11B 700

Patent

active

049775537

ABSTRACT:
Identification of a tracking servo system type with which a recording disc is to be used. Data is provided to inform a recording/reproducing apparatus that user data is recorded for reproduction by either a sample servo system or a continuous reproduction servo system. Identification data is recorded in a constant angular velocity (CAV) format, in which the data, recorded a plurality of times in a predetermined region of the disc, is located in the same circumferential but a different radial location on the disc. The predetermined region may be in an inner or outer portion of the disc, and has a width greater than the eccentricity of the disc.

REFERENCES:
patent: 4426693 (1984-01-01), Satoh et al.
patent: 4558375 (1985-12-01), Sontheimer
patent: 4695904 (1987-09-01), Shinyagaito et al.
patent: 4773036 (1988-09-01), Berens et al.
patent: 4789975 (1988-12-01), Taniyama
patent: 4827462 (1989-05-01), Flannagan et al.

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