METHOD FOR GENERATING RLL CODE HAVING IMPROVED SUPPRESSION ABILITY OF DC COMPONENT AND METHOD FOR MODULATING AND DEMODULATING GENERATED RLL CODE

Japanese Patent JP3466130

B2

PROBLEM TO BE SOLVED: To efficiently suppress the DC component with a few bits by considering the feature parameters CSV ad INV of a code word and allocating/arranging them to a code word main code group and a judgment code group for discriminating a multiple code word.
SOLUTION: A code word is generated with the condition of RLL (d, k, m, n)=(2, 12, 8, 15). For efficiently using the code word which is overlapped ad generated, a feature is extracted. CSV shows a DC component value in one code word. '0' or '1' are inverted in a part from '1' to next '1' and the difference of the numbers is calculated. INV is the prediction of the transition direction of the DC component value of the following code word and the value of '0' or '1' is given according to whether the number of '1' in the code word is even or odd. When the value of INV accumulated in a code word stream is '1', CSV of the following code word is accumulated by inverting a code.

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Shen Jae-sung
Former appearance

JP2000065488A

November 10, 2003

March 09, 2000

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Samsung Electronics Co.,Ltd.

G11B20/14; H03M5/14; H03M7/14; H03M7/46; (IPC1-7): H03M7/14; G11B20/14

JP831100A
JP9246979A
JP9162744A
JP10233690A

Masatake Shiga (1 person outside)

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