DVD recording method and rewritable DVD apparatus
AssigneesHitachi, Ltd., Hitachi-LG Data Storage, Inc.
InventorsJunko Ushiyama, Hiroyuki Minemura
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Abstract
The DVD recording method is intended to increase the number of cycles allowed for recording on the disk an enormous number of times. This method comprises generating two data streams by using a plurality of code mapping variants prepared for coding input data, quasi-randomly selecting one of the plurality of code mapping variants, if absolute DSVs of the two streams are substantially equal, and converting into recording code sequences. This method prevents deterioration of the disk particularly in the management area and increases the number of cycles allowed for rewriting.
Claims15
A DVD recording method for recording data onto recording media by using a given coding rule, comprising:
- generating two data streams by using a plurality of code mapping variants prepared for coding input data, quasi-randomly selecting one of the plurality of code mapping variants if absolute DSVs of the two data streams are substantially equal, and converting into recording code sequences;
- and
- recording data onto said recording media, based on said recording code sequences.
A DVD recording apparatus for recording data onto recording media, comprising:
- first and second tables for coding input data;
- selecting means for comparing the absolute DSVs of output code words and selecting either said first or second table according to the DSVs;
- a randomizer for randomly selecting said first or second table;
- means for converting said input data into output code words by referring to said first or second table;
- and
- means for recording data onto said recording media, based on said output code words.
Dependencies are inferred from the claim text.