公开(公告)号：KR1020020043814A

公开(公告)日：2002-06-12

申请号：KR1020000072939

申请日：2000-12-04

Applicant: 삼성전자주식회사

Inventor： 전진훈 ,  고정완 ,  오오쯔까다쯔히로

IPC: G11B7/007

CPC classification number: G11B27/3027 ,  G11B7/00745 ,  G11B20/10009 ,  G11B27/24 ,  G11B2220/216 ,  G11B2220/2575

Abstract: PURPOSE: A device for detecting a header area is provided to restore a wobble clock based on a detected wobble signal and a wobble modulation signal, and to perform a locked phase for a BPSK(Binary Phase Shift Keying) signal by a PLL module, then to demodulate the wobble modulation signal according to the restored wobble clock to operate an auto-correlation R of the demodulated signal, thereby stably detecting the header area. CONSTITUTION: A PLL(Phase Locked Loop) module(61) inputs a detected wobble modulation signal recorded on a wobble modulation area, and outputs a clock signal. A demodulator(62) inputs the wobble modulation signal, and demodulates the wobble modulation signal according to the clock signal output from the PLL module. A correlator(63) operates an auto-correlation for the wobble modulation signal demodulated from the demodulator, and outputs a header indicator signal based on the operated auto-correlation. The wobble modulation area is formed between a wobble track and a header area, and is located on a boundary area between sectors. The wobble modulation signal is generated by BPSK for binary data having predetermined length, and is a PR(Pseudo Random) signal.

Abstract translation: 目的：提供一种用于检测报头区域的设备，用于基于检测到的摆动信号和摆动调制信号恢复摆动时钟，并通过PLL模块执行BPSK（二进制相移键控）信号的锁相位，然后 根据恢复的摆动时钟来解调摆动调制信号，以操作解调信号的自相关R，从而稳定地检测报头区域。 构成：PLL（锁相环）模块（61）输入记录在摆动调制区域上的检测到的摆动调制信号，并输出时钟信号。 解调器（62）输入摆动调制信号，并根据从PLL模块输出的时钟信号来解调摆动调制信号。 相关器（63）对从解调器解调的摆动调制信号进行自相关，并且基于所操作的自相关输出标题指示符信号。 摆动调制区域形成在摆动轨道和报头区域之间，并且位于扇区之间的边界区域上。 由BPSK生成具有预定长度的二进制数据的摆动调制信号，并且是PR（伪随机）信号。