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。

公开(公告)号：US20030026596A1

公开(公告)日：2003-02-06

申请号：US10177729

申请日：2002-06-20

Applicant: STMicroelectronics S.r.I.

Inventor： Giorgio Betti ,  Angelo Dati ,  Viviana D'Alto ,  Danilo Pau ,  Filippo Santinello

IPC: H03M013/00 ,  H04N007/26

CPC classification number: H04N19/00266 ,  H04N19/157 ,  H04N19/172 ,  H04N19/61

Abstract: A method of storing a data file, particularly in the MPEG format and including a flow of different frames, comprises a protection system for the data file based on a parameter stored in the data file. Advantageously, the storage method comprises selectively protecting the frames by storing parameters that are associated with corresponding different frames whose values are selected to provide a playing quality level requested by an end user. Also, a method is provided for decoding a data file, particularly of the MPEG type and including a flow of different frames, wherein the data file is stored per above.

Abstract translation: 特别是以MPEG格式存储并包括不同帧流的数据文件的方法包括基于存储在数据文件中的参数的数据文件的保护系统。 有利地，存储方法包括通过存储与其值被选择的相应不同帧相关联的参数来选择性地保护帧，以提供终端用户请求的播放质量等级。 此外，提供了一种用于对数据文件进行解码的方法，特别是MPEG类型的数据文件，并且包括不同帧的流程，其中数据文件存储在上面。

公开(公告)号：US20030012303A1

公开(公告)日：2003-01-16

申请号：US10159773

申请日：2002-05-31

Applicant: STMicroelectronics S.r.I.

Inventor： Angelo Dati ,  Cecilia Tonci ,  Paolo Gaducci

IPC: H04L027/22 ,  H04L027/14 ,  H04L027/06

CPC classification number: G11B20/10009

Abstract: A method is provided for optimizing a PRML (Partial Response Maximum Likelihood) receiving channel for mass memory data receiving systems comprising an input receiving channel, a receiver placed downstream of the channel, a detector connected in cascade to the receiver, and a summing node being input both the receiver output through a delay line, and the output from the detector through an impulsive filter. The method includes performing an indirect estimate of the noise strength by filtering out the error sequence, i.e. the output signal from the summing node, through a filter, and selecting either the output from the summing node or the output from the filter to obtain an optimization parameter for feedback to the receiving system.

Abstract translation: 提供一种用于优化用于大容量存储器数据接收系统的PRML（部分响应最大似然）接收通道的方法，所述接收通道包括输入接收通道，放置在通道下游的接收器，级联连接到接收器的检测器， 通过延迟线输入接收器输出，并通过脉冲滤波器输入来自检测器的输出。 该方法包括通过滤除误差序列，即来自求和节点的输出信号，通过滤波器，以及选择来自求和节点的输出或来自滤波器的输出来获得最优化来执行噪声强度的间接估计 用于反馈给接收系统的参数。

公开(公告)号：US20030101410A1

公开(公告)日：2003-05-29

申请号：US10176968

申请日：2002-06-21

Applicant: STMicroelectronics S.r.I

Inventor： Giorgio Betti ,  Filippo Brenna ,  Angelo Dati ,  Augusto Rossi ,  Luca Reggiani

IPC: H03M013/00 ,  H03M013/03

CPC classification number: G11B20/10296 ,  G11B20/10009 ,  G11B20/1833

Abstract: A method and apparatus for detecting and correcting errors in a magnetic recording channel of a mass storage system that combines a Soft Output Viterbi Algorithm SOVA, which has the capability of detecting the reliability of a discrete, equalized signal, and a post processor, which has the capability of detecting specific error events in said discrete, equalized signal, so as to correct error events and to generate an output bit stream.

Abstract translation: 一种用于检测和校正大容量存储系统的磁记录通道中的错误的方法和装置，其组合具有检测离散均衡信号的可靠性的能力的软输出维特比算法SOVA和后处理器，后处理器具有 在所述离散的均衡信号中检测特定错误事件的能力，以便校正错误事件并产生输出比特流。