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

US5007053A Method and apparatus for checksum address generation in a fail-safe modular memory 失效
标题翻译：在故障安全模块化存储器中生成校验和地址的方法和装置
公开(公告)号：US5007053A
公开(公告)日：1991-04-09
申请号：US278104
申请日：1988-11-30
申请人： Balakrishna R. Iyer , Daniel M. Dias , Yitzhak Dishon
发明人： Balakrishna R. Iyer , Daniel M. Dias , Yitzhak Dishon
IPC分类号： G06F12/16 , G06F3/06 , G06F11/10 , G11C29/00
CPC分类号： G06F11/1008 , G06F11/1028 , G06F11/1076 , G11C29/70
摘要： A modular fail-safe memory and an address generation mechanism that provides load balancing when the memory is shared by a number of processors. A plurality of memory modules are used for the memory with no specific limit on the number of memory modules, and a checksum block is used to back-up corresponding blocks in the other memory modules. The checksum blocks are distributed across the memory modules, and an address generation mechanism determines the checksum location for a specific memory block. This address generation mechanism ensures that checksum blocks are equally divided between the memory modules so that there is no memory bottleneck, is easy to implement in hardware, and is extended to provide similar properties when a module failure occurs.

2. 发明授权

US4099257A Markov processor for context encoding from given characters and for character decoding from given contexts 失效
标题翻译：马尔可夫处理器用于从给定字符进行上下文编码，并从给定的上下文中进行字符解码
公开(公告)号：US4099257A
公开(公告)日：1978-07-04
申请号：US720019
申请日：1976-09-02
申请人： Richard Fairbanks Arnold , Yitzhak Dishon , Norman Ken Ouchi , Marshall I. Schor
发明人： Richard Fairbanks Arnold , Yitzhak Dishon , Norman Ken Ouchi , Marshall I. Schor
IPC分类号： H03M7/40 , H03M7/42 , H04L23/00 , G06F5/00
CPC分类号： H03M7/4025 , H03M7/42
摘要： In an apparatus for generating variable length codewords c(a.sub.i) and c(a.sub.j) responsive to corresponding fixed length codewords b(a.sub.i) and b(a.sub.j), where a.sub.i and a.sub.j are source alphabet characters, a.sub.i .epsilon. A.sub.1 and a.sub.j .epsilon. A.sub.2, ambiguity arises whenever any fixed length character to be encoded can instantaneously represent source characters a.sub.i and a.sub.j drawn from two or more dissimilar alphabets i.e. A.sub.1 or A.sub.2. This is resolved by the inclusion of a Markov processor in combination with the apparatus. The processor establishes the point in the sequence when transitions occur between fixed length characters in one alphabet to fixed length characters in another alphabet by the message context. The processor includes a map of state and transition paths. This map models certain statistical regularities of runs of fixed code elements and the relative likelihood that an ambiguous fixed code character appearing in a first run belongs to a given alphabet. The processor, starting from an arbitrary initial position, tracks any given run of fixed code characters applied to the encoder in terms of a succession of states and paths.
摘要翻译：在用于产生响应于对应的固定长度码字b（ai）和b（aj））的可变长度码字c（ai）和c（aj）的装置中，其中ai和aj是源字母字符，ai∈A1和ajε2A2，每当要编码的任何固定长度字符可以瞬时表示从两个或多个不同字母（即A1或A2）绘出的源字符ai和aj时，就会出现歧义。这通过将马尔科夫处理器与该装置结合在一起来解决。当一个字母的固定长度字符与另一个字母表中的固定长度字符之间的转换发生在消息上下文中时，处理器将按顺序建立点。处理器包括状态和转换路径的映射。该地图模拟固定代码元素运行的某些统计规律，以及出现在第一个运行中的模糊固定代码字符属于给定字母表的相对可能性。处理器从任意的初始位置开始，根据一系列状态和路径跟踪应用于编码器的固定代码字符的任何给定运行。

3. 发明授权

US4849978A Memory unit backup using checksum 失效
标题翻译：使用校验和进行内存单元备份
公开(公告)号：US4849978A
公开(公告)日：1989-07-18
申请号：US68862
申请日：1987-07-02
申请人： Yitzhak Dishon , Christos J. Georgiou
发明人： Yitzhak Dishon , Christos J. Georgiou
IPC分类号： G06F12/16 , G06F11/10
CPC分类号： G06F11/1008 , G06F11/1028 , G06F11/1076
摘要： A memory system backup for use in a tightly or loosely coupled multiprocessor system. A plurality of primary memory units having substantially the same configuration are backed up by a single memory unit of similiar configuration. The backup memory unit holds the checksum of all data held in all primary memory units. In the event of the failure of one of the primary memory units its contents can be recreated based on the data in the remaining non-failed memory unit and the checksum in the backup unit.

4. 发明授权

US4862411A Multiple copy data mechanism on synchronous disk drives 失效
标题翻译：同步磁盘驱动器上的复制数据机制
公开(公告)号：US4862411A
公开(公告)日：1989-08-29
申请号：US19407
申请日：1987-02-26
申请人： Yitzhak Dishon , Michelle Y. Kim
发明人： Yitzhak Dishon , Michelle Y. Kim
IPC分类号： G06F13/10 , G06F3/06 , G06F11/20 , G11B19/28 , G11B21/08 , G11C29/00
CPC分类号： G06F3/0601 , G11B19/28 , G11B21/083 , G11C29/74 , G06F2003/0692
摘要： At least two direct access storage devices (DASDs), which are predetermined to record the same data from a central processing unit (CPU), are normally kept synchronzied with each other except during the power up phase. The DASD synchronization is controlled and maintained by synchronization control means independent of any commands from the CPU. When one or more commands such as SEEK and SET SECTOR or LOCATE commands are transferred from the CPU to a control unit over a single data transfer path between them, desired identical records on the synchronized DASDs are concurrently located while the DASDs are disconnected from the data transfer path. Upon locating the desired identical records, the DASDs are reconnected to the data transfer path. Then, a WRITE command is transferred from the CPU to the control unit for concurrently recording the same data onto the synchronized DASDs at the desired record locations. Thus, at the conclusion of this recording, when status information is reported to the host CPU, it is assured that multiple copies of the same data are recorded onto the synchronized DASDs.

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