Optical recording disc capable of preventing illegal copy

Details Optical recording disc capable of preventing illegal copy Optical recording disc capable of preventing illegal copy

1998-08-19

2000-08-22

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

G11B 724

Patent

active

061082961

ABSTRACT:
Micro-pits or micro-pit strings, which are disabled precise copying by means of illegal copying described above and enable signals different from signals of a normal disc to be detected in case of failure in precise copying, are recorded in a copy protected area of an optical disc beforehand. A read unit checks the copy protected area and determines a loaded disc is legal disc or illegally copied disc. If illegal, reading is prohibitted.

REFERENCES:
patent: 5538773 (1996-07-01), Kondo
patent: 5570339 (1996-10-01), Nagano
patent: 5572507 (1996-11-01), Ozaki et al.
patent: 5696757 (1997-12-01), Ozaki et al.
patent: 5807640 (1998-09-01), Ueno et al.
patent: 5809006 (1998-09-01), Davis et al.
patent: 5812501 (1998-09-01), Moribe et al.
patent: 5818812 (1998-10-01), Moribe et al.
patent: 5875156 (1999-02-01), Ito et al.
patent: 5886979 (1999-03-01), Moribe et al.

Affiliated with

Also associated with

Rating

Optical recording disc capable of preventing illegal copy does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical recording disc capable of preventing illegal copy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical recording disc capable of preventing illegal copy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-589057