Optical disc and optical disc apparatus for forming wobbled trac

Details Optical disc and optical disc apparatus for forming wobbled trac Optical disc and optical disc apparatus for forming wobbled trac

1997-08-28

1999-12-07

Edun, Muhammad

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 4413, G11B 700

Patent

active

059995041

ABSTRACT:
An optical disc and associated recording/reproducing apparatus is described which creates and reads wobbled tracks on the optical disc. Wobbled tracks are formed in correspondence to a wobble signal which is phase modulated with address information. Phase modulation is used to convert the address information to the wobble signal. The carrier to noise ratio (C/N) of the address information is good, and it is possible to shorten the wobbling amplitude of the tracks while maintaining addressing capabilities. It is thus possible to arrange the track pitch in a high density, and increase the recording capacity of the optical disc.

REFERENCES:
patent: 5444687 (1995-08-01), Okumura

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