Patent ID: 6198710
Filing Date: 2001-03-06
Classification: G11B

Abstract:
A digital recording method for selecting and recording modulation record data that has a direct current component of recording suppressed out from a group of modulation record data candidates, comprising the steps of:adding a plurality of types of data of a predetermined number of bits as initial data to input data;applying a convolution process by performing an exclusive-OR operation between a current code modulation unit to be transformed and a code modulation unit immediately before said current code modulation unit in a predetermined sequence for every of said predetermined number of bits and substituting the obtained value for said current code modulation unit to generate said group of a plurality of types of modulation record data candidates from said input data; andcomparing current components of recording of each of said plurality of types of modulation record data for selecting and recording modulation record data according to a comparison result.