Patent ID: 6195323
Filing Date: 2001-02-27
Classification: G11B,H03M

Abstract:
A data coding method of an optical disk having a dual spiral track including a first spiral and a second spiral which are disposed adjacent to each other and on which information is simultaneously recorded, wherein the data coding method includes the steps of:utilizing a quaternary form depending on whether respective pits are formed on the first spiral and the second spiral, respectively, and using a modulated code for 8 bit--8 bit nonreturn-to-zero-inverted (NRZI) recording, wherein a run-length-limited (RLL) code in which a minimum run of '0' data bits is 2 is included in each of the 8-bit NRZI units; andconverting the 8-bit NRZI units into 10 channel bit units by adding 2 channel merging bits between the 8-bit NRZI units.