专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5521767A Optimized equalizer system for data recovery and timing extraction in partial response read channels 失效
标题翻译：优化的均衡器系统用于部分响应读通道中的数据恢复和定时提取
公开(公告)号：US5521767A
公开(公告)日：1996-05-28
申请号：US406834
申请日：1995-03-20
申请人： Lih-Jyh Weng , An-Loong Kok , Barry H. Gold
发明人： Lih-Jyh Weng , An-Loong Kok , Barry H. Gold
IPC分类号： G11B5/09 , G11B20/10 , H03L7/06 , H04L25/497 , G11B5/035 , H04L25/34
CPC分类号： G11B5/09 , G11B20/10009 , H03L7/06 , H04L25/497
摘要： A simplified architecture is provided for a partial response read channel. One digital equalizer is used in conjunction with a simple shaping circuit to minimize power consumption while concurrently optimizing both the data recovery and timing extraction functions.
摘要翻译：为部分响应读通道提供了简化的架构。一个数字均衡器与简单整形电路结合使用，以最小化功耗，同时优化数据恢复和定时提取功能。

2. 发明授权

US06278748B1 Rate 5/6 maximum transition run code for read channels 失效
标题翻译：读取通道的5/6最大转换运行代码的速率
公开(公告)号：US06278748B1
公开(公告)日：2001-08-21
申请号：US09070438
申请日：1998-04-30
申请人： Leo Fu , An-Loong Kok
发明人： Leo Fu , An-Loong Kok
IPC分类号： H03D100
CPC分类号： G11B20/10064 , G11B20/10009 , G11B20/1426 , H03M7/00 , H03M13/41 , H03M13/6343
摘要： A method and apparatus encoding and decoding data for storage on a mass storage device is described. The code used is a 5/6 rate code in which a maximum transition run constraint is imposed. This code is designed for use with an EEPR4 read channel and provides a Euclidian squared free distance, d2free, of 10 when used with an EEPR4 partial response filter and a Viterbi decoder.
摘要翻译：描述了用于存储大容量存储设备的数据的编码和解码方法和装置。所使用的代码是一个5/6速率代码，其中施加了最大过渡运行约束。该代码设计为与EEPR4读通道一起使用，并在与EEPR4部分响应滤波器和维特比解码器一起使用时提供欧几里得平方的自由距离，d2free，为10。

3. 发明授权

US5631909A Method and apparatus for determining burst errors in an error pattern 失效
标题翻译：用于确定错误模式中的突发错误的方法和装置
公开(公告)号：US5631909A
公开(公告)日：1997-05-20
申请号：US454959
申请日：1995-05-31
申请人： Lih-Jyh Weng , Pak N. Hui , An-Loong Kok
发明人： Lih-Jyh Weng , Pak N. Hui , An-Loong Kok
IPC分类号： G11B20/18 , H03M13/17 , H03M13/23 , H04L1/00 , G06F11/00
CPC分类号： H03M13/17
摘要： A burst error counting system determines for each sector-long error pattern a unique, minimum number of burst errors by (i) specifying, based on the statistical operation of the system, a maximum burst length, L; (ii) determining the location in the error pattern of a first erroneous bit, b.sub.FIRST ; (iii) associating the next L-1 bits with b.sub.FIRST ; (iv) incrementing a burst counter; (v) searching for a next b.sub.FIRST in the remaining bits of the error pattern; and (vi) repeating iii-v. The system may also store the position, that is, bit count, of these b.sub.FIRST 's. Each time the burst error count is incremented, the system compares the count to a predetermined burst error threshold, which is equal to or less than the maximum number of burst errors that can be expected in a sector that is not corrupted to a point at which error correction may produce an incorrect result. If the number of burst errors exceeds the threshold, the system ends its burst counting operation and characterizes the sector as uncorrectable. The system may count the burst errors from both ends of the error pattern simultaneously. It thus determines the position of b.sub.FIRST and b.sub.LAST and associates with them, respectively, the succeeding L-1 bits and the preceding L-1 bits. It then determines if b.sub.LAST is within the L-1 bits associated with b.sub.FIRST, and if not, the system increments its burst count by two and, as appropriate, searches for additional burst errors.
摘要翻译：突发错误计数系统通过（i）基于系统的统计操作来指定最大突发长度L来确定每个扇区长错误模式唯一的最小数量的突发错误; （ii）确定第一错误位bFIRST的错误模式中的位置; （iii）将下一个L-1位与bFIRST相关联; （iv）增加突发计数器; （v）在错误模式的其余位中搜索下一个bFIRST; 和（vi）重复iii-v。该系统还可以存储这些bFIRST的位置，即位计数。每当突发错误计数增加时，系统将计数与预定的突发错误阈值进行比较，该预定突发错误阈值等于或小于在没有被破坏到一个点的扇区中可以预期的最大突发错误数，纠错可能会产生不正确的结果。如果突发错误的数量超过阈值，系统将结束其突发计数操作，并将扇区表征为不可校正的。系统可以同时对错误模式两端的突发错误进行计数。因此，它分别确定bFIRST和bLAST的位置，并分别与后续的L-1位和前一个L-1位相关联。然后，它确定bLAST是否在与bFIRST相关联的L-1位内，如果不是，则系统将其突发计数增加2，并且酌情搜索附加的突发错误。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式