Data reproducing apparatus which replaces vendor unique identification data in response to a reference error correction rate which is lower than that used for replacement of other data
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United States of America Patent
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-
Jan 7, 1997
Issued Date -
N/A
app pub date -
Oct 6, 1995
filing date -
Aug 17, 1993
priority date (Note) -
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status (Latency Note)
Importance
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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