Data randomization for rewriting in recording/reproduction apparatus
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United States of America Patent
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Oct 7, 2008
Grant Date -
Sep 14, 2006
app pub date -
Mar 9, 2005
filing date -
Mar 9, 2005
priority date (Note) -
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Abstract
A data recording/recovery device (20) comprises a packet generator (34) for including recordable information into a packet (44), the packet initially having a nominal run length limited (RLL) sequence if it were RLL encoded. A randomizer (38) uses a randomizer input value (50) to obtain a modified packet (46) which, when encoded, will at least partially have a different run length limited sequence than the nominal run length limited sequence. A write channel (40) records the modified packet (46) as a track packet at a destination physical location (42) on a storage medium (22). The randomizer input value (50) used to obtain the modified packet (46) is related to a predetermined physical location on the storage medium. In one example embodiment the randomizer input value is related to the destination physical location on the storage medium.
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