Recording apparatus, reproducing apparatus and optical recording

Details Recording apparatus, reproducing apparatus and optical recording Recording apparatus, reproducing apparatus and optical recording

1998-03-17

2000-12-05

Dinh, Tan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, 369 58, 369 84, 369 47, 380201, G11B 728, G11B 364, H04N 7167

Patent

active

061576069

ABSTRACT:
A recording apparatus for modulating a master key used for encrypting main data in a pit-width direction by changing a light amount of a laser beam to then record it on an optical recording medium and records the main data encrypted by using the master key with correcting the main data so as to have a certain pit width and a pit length so that a jitter resulting in intersymbol interference of adjacent pits should be reduced. A reproducing apparatus for reproducing the recorded optical recording medium, and to thereby prevent an optical recording medium from being duplicated by an illegal copy.

REFERENCES:
patent: 5406625 (1995-04-01), Kotaka et al.
patent: 5517533 (1996-05-01), Szmauz et al.
patent: 5761301 (1998-06-01), Oshima et al.
patent: 5802174 (1998-09-01), Sako et al.
patent: 5809545 (1998-09-01), Ozaki et al.

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