Run-length limited code distributing method, modulating and demodulating method and device thereof

Application Number: 00118646
Application Date: 2000.04.21
Publication Number: 1274998
Publication Date: 2000.11.29
Priority Information: 1999/4/21 KR 14284/99; 1999/6/16 KR 22574/99; 1999/9/30 KR 42032/99
International: G11B20/10;H03M7/46
Applicant(s) Name: Samsung Electronics Co., Ltd.
Inventor(s) Name: Shim Chae-Seng;Won Yong-Gwang;Go Jong-Wan
Patent Agency Code: 11105
Patent Agent: ma ying
Abstract An allocating method of allocating a run length limited (RLL) code having enhanced direct current (DC) suppression capability, modulation and demodulation methods, and a demodulation apparatus are provided. In order to control DC suppression, a pair of code groups having suppression controlling capability are allocated, and a (1, 8, 8, 12) code having DC suppression capability, in which a code word of the pair of code groups has the sign of code word sum value (CSV) parameter and the characteristic of an INV parameter, both opposite to those of the code word which belongs to the other code group and corresponds to the same source code, is used and is appropriate to high-density optical disc system.