Dynamic information storage or retrieval – Duplication or copying
Patent
1996-06-13
1998-09-22
Hindi, Nabil
Dynamic information storage or retrieval
Duplication or copying
369 32, 369 60, G11B 700
Patent
active
058125124
ABSTRACT:
A disc driving apparatus for driving a disc recording medium on which a plurality of sets of user data and a plurality of unique data, each of which is related to each set of the user data, are recorded, and including a reproducing circuit for reproducing the unique data and the user data recorded on the disc recording medium, an error correction circuit for correcting errors in the data reproduced by the reproducing circuit and detecting an error rate of the data reproduced by the reproducing circuit, and a data replacement circuit for recording the unique data which is error-corrected by the error correction circuit in a replacement area of the disc recording medium when the error rate of the unique data is higher than a first reference error rate and for recording the user data which is error-corrected by the error correction circuit in the replacement area of the disc recording medium when the error rate of the user data is higher than a second reference error rate which second reference error rate is different from the first reference error rate.
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Funahashi Takeshi
Tobita Minoru
Hindi Nabil
Sony Corporation
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