MODULATING DEVICE, MODULATION METHOD, RECORD MEDIUM

摘要

PROBLEM TO BE SOLVED: To prevent a digital information signal recorded on an original record medium from being copied. SOLUTION: When a code word sequence is generated by converting input data words D of p bits into code words C of q bits and adding a merge bit 1b of r bits in order to obtain the best DSV value between adjacent code words C and D, a modulating device 30 is offered. The modulating device is characterized in that it does not strictly comply with the minimum run length (d+1) T - the maximum run length (k+1)T established for code word sequence based on the run length restriction regulations RLL (d, k) but instead, adds the merge bit 1b of r-bits between the code words C and C in order to permit the minimum run length (d+1) T - the maximum run length (k+2) T. COPYRIGHT: (C)2004,JPO