Patent ID: 6829306
Filing Date: 2004-12-07
Classification: G11B,H03M

Abstract:
A method of converting a series of data word into a modulated signal with coding rate of m/n, comprising the steps of:(a) generating for each data word a number of intermediate sequences by combining mutually different digital words with the data word wherein a length r of the digital word has been determined such that bit length of the data word added by the length r is a multiple of m; (b) scrambling each intermediate sequence to form a set of alternative sequences; (c) translating each alternative sequence into a (d, k) constrained sequence according to the coding rate m/n; and (d) measuring how much undesirable each (d, k) constrained sequence is, and selecting one (d, k) constrained sequence for recording onto a recordable medium among the translated (d, k) constrained sequences based on the measured results.