Method and arrangement for preventing unauthorized duplication o

Details Method and arrangement for preventing unauthorized duplication o Method and arrangement for preventing unauthorized duplication o

1996-11-07

1998-07-28

HIndi, Nabil

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 54, 369 32, G11B 700

Patent

active

057870683

ABSTRACT:
An optically-readable data disc includes piracy-protection featuring noncontiguously sequenced data files in zones separated by head-derailing barriers. The disc includes a plurality of data-placement zones and read-blocking barriers constructed along the spiral track over gaps which separate the zones. Data files are recorded in each of the zones, and an address-information data file includes data which identifies addresses of data files to be sequentially read in noncontiguous zones. By arranging the data files noncontiguously with barriers in gaps between the data files, efforts to duplicate the master disc by attempting to read the data files contiguously are deterred and/or prevented.

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Helgerson, Linda W., More Than You Probably Want to Know About CD Technology, (5 pages) undated.

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