公开(公告)号：US20030128449A1

公开(公告)日：2003-07-10

申请号：US10033726

申请日：2001-12-28

Applicant: STMicroelectronics S.r.I.

Inventor： Angelo Dati ,  Davide Giovenzana

IPC: G11B020/10 ,  G11B005/09 ,  G11B005/596

CPC classification number: G11B20/10287 ,  G11B20/10009 ,  G11B20/10055 ,  G11B20/10296

Abstract: A system provides two distinct solutions for encoding and decoding servo positioning data for a hard disk drive. A first solution includes: encoding each group of four bits of a pattern signal in a Matched Spectral Null (MSN) format through an intermediate rate {fraction (4/6)} code; providing a duplicated bit for each bit of the six bit code word obtained with the previous step. A second solution includes: encoding each group of four bit of the pattern signal adding a parity check bit as an intermediate rate null code; encoding each of the five bits using the biphase map. Both solutions include subsequently: reading a servo wedge information signal using a read and write channel of the hard disk drive; and using a trellis Partial Response decoding scheme matched to said encoded word for obtaining angular and radial information for the head positioning.

Abstract translation: 系统为硬盘驱动器的伺服定位数据的编码和解码提供了两个不同的解决方案。 第一个解决方案包括：通过中间速率4/6代码以匹配光谱空（MSN）格式对每组4位模式信号进行编码; 为前一步获得的六位码字的每一位提供一个复制位。 第二个解决方案包括：对每组4位模式信号进行编码，将奇偶校验位作为中间速率⅘码; 使用双相图编码五位中的每一位。 这两种解决方案包括：使用硬盘驱动器的读和写通道读取伺服楔信息信号; 以及使用与所述编码字匹配的网格部分响应解码方案来获得头部定位的角度和径向信息。