Data copy protection using reproduction error determination...

Details Data copy protection using reproduction error determination... Data copy protection using reproduction error determination...

2006-06-13

2006-06-13

Peikari, B. James (Department: 2189)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S720000, C714S735000, C713S193000

Reexamination Certificate

active

07062686

ABSTRACT:
When a program is activated, data recorded in a predetermined sector is reproduced by an error correction. When no reproduction error occurs, the data in the predetermined sector is reproduced without conducting the error correction. When reproduced data are not a predetermined pattern, it is determined that write software illegally writes dummy data to the predetermined sector, instead of the predetermined pattern, and an optical disc where the program is activated is a copied optical disc. Accordingly, a process conducted by the program is terminated. Therefore, a process realizing original functions based on the program cannot be executed.

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patent: 6718501 (2004-04-01), Brody et al.
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