Optical recording medium, recording apparatus and method for...

Details Optical recording medium, recording apparatus and method for... Optical recording medium, recording apparatus and method for...

2006-08-29

2006-08-29

Dinh, Tan (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S275400

Reexamination Certificate

active

07099258

ABSTRACT:
Audio data of 20 bits is separated into first data of upper 16 bits and second data of lower 4 bits. EFM modulation data is formed from the first data. A laser beam is on/off controlled in correspondence to the logic level of channel data obtained by NRZI modulating a serial data train. The first data, therefore, is recorded in a manner similar to the case of a compact disc. Each pit is controlled so as to have a displacement in the right/left direction for the track center in accordance with the second data and the deviated pit is formed. When data is recorded by the displacement of the pit, since a high frequency component of a tracking error signal changes upon reproduction, the second data can be extracted from the tracking error signal.

REFERENCES:
patent: 5570339 (1996-10-01), Nagano
patent: 5696757 (1997-12-01), Ozaki et al.
patent: 5940364 (1999-08-01), Ogata et al.
patent: 6295271 (2001-09-01), Inui et al.
patent: 6665240 (2003-12-01), Kobayashi et al.
patent: 6810004 (2004-10-01), Sako

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