Patent ID: 6281815
Filing Date: 2001-08-28
Classification: G11B,H03M

Abstract:
An allocating method of allocating code groups grouped by characteristics of code words after generating a run length limited (RLL) code which is represented by (d, k, m, n), wherein d indicates the minimum run length, k indicates the maximum run length, m indicates the length of data bits, and n indicates the length of code word bits, the allocating method comprising the:allocating a pair of the code groups for controlling direct current (DC) suppression in a code word stream; andallocating code words to the pair of code groups, the code words corresponding to a same source code, so that corresponding ones of the code words of each of the code groups have opposite signs of a 1.sup.st parameter, a code word sum value (CSV), which represents a DC value in the code word and opposite characteristics of a 2.sup.nd parameter INV which predicts a transition direction of a digital sum value (DSV) of a succeeding code word.