Information carrier and recording and/or reproducing apparatus a

Details Information carrier and recording and/or reproducing apparatus a Information carrier and recording and/or reproducing apparatus a

1996-06-24

1999-10-26

Barron, Gilberto

Cryptography

Cryptanalysis

360 60, G11B 15087

Patent

active

059741406

ABSTRACT:
ID codes are given individually to each reproducing apparatus. An information carrier has a subsidiary storing area for recording reproduction-management-information (RMI) and ID codes can be registered in this area. When the ID code is registered, the reproducing apparatus is permitted to reproduce main information from the information carrier. When a reproducing apparatus with an unregistered ID code tries to reproduce the main information, the ID code of the reproducing apparatus itself is registered in the RMI of the information carrier and the main information is reproduced. The number of ID codes for permitting registration in the RMI is limited. When the area for registering the ID code is fully occupied, the main information cannot be reproduced by reproducing apparatuses that have unregistered ID codes. When the reproducing apparatus digitally copies the main information reproduced from the information carrier where the ID code of the reproducing apparatus is registered, the ID code of the reproducing apparatus is registered in the information carrier of the copy destination. An initializing apparatus for initializing the RMI in the information carrier accumulates the total number of ID codes registrable in the RMIs of the information carriers initialized by the initializing apparatus.

REFERENCES:
patent: 4588991 (1986-05-01), Atalla
patent: 4595950 (1986-06-01), Lofberg
patent: 4785361 (1988-11-01), Brothy
patent: 4866769 (1989-09-01), Karp
patent: 5057947 (1991-10-01), Shimada
patent: 5231546 (1993-07-01), Shimada
patent: 5267311 (1993-11-01), Bakhoum
patent: 5293422 (1994-03-01), Loiacono
patent: 5371792 (1994-12-01), Asai et al.
patent: 5379433 (1995-01-01), Yamagishi
EPO Search Report (93308231.5) dated Feb. 7, 1995.

Affiliated with

Also associated with

Rating

Information carrier and recording and/or reproducing apparatus a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Information carrier and recording and/or reproducing apparatus a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information carrier and recording and/or reproducing apparatus a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-772657