Method and apparatus for high-density recording and reproduction

Details Method and apparatus for high-density recording and reproduction Method and apparatus for high-density recording and reproduction

1982-03-29

1983-11-15

Hecker, Stuart N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

358342, 360 77, 369 54, G11B 2110, G11B 2728

Patent

active

044160020

ABSTRACT:
A recording/reproduction system is disclosed in which main information in the form of high-frequency signal is recorded in time sequence along a multiplicity of tracks adjacent to each other. A discrimination signal is superimposed on the high-frequency signal in advance for recording and has a different occupied frequency band for each adjacent track, whereby discrimination of lead or lag in track arrangement is accomplished. The difference of the discrimination signal between tracks may take the form of phase difference with the same frequency or signals of different frequencies.

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Bussche et al., "Signal Processing in the Philips `VLP` System", Philips Tech. Rev. 33, pp. 181-185, 1973, No. 7.

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