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1. 发明授权

US4870415A Data compression system with expansion protection 失效
标题翻译：数据压缩系统具有扩展保护
公开(公告)号：US4870415A
公开(公告)日：1989-09-26
申请号：US109969
申请日：1987-10-19
申请人： David J. Van Maren , Jeff J. Kato
发明人： David J. Van Maren , Jeff J. Kato
IPC分类号： G06F5/00 , G06F12/00 , G06F17/22 , H03M7/42 , H03M7/48
CPC分类号： G06F17/22 , H03M7/42 , H03M7/48
摘要： A data compression system implementing expansion protection employs one or more pairs of FIFOs to compare the lengths of raw and processed versions of a block of received data. The shorter version is transmitted so that the data transmitted by the data compression system is at most negligibly expanded relative to the system input. A code is inserted in the output stream to indicate the beginning of the transmission of a raw data block so that a receiving or retrieving system can determine whether the data following needs to be decompressed or not. Further codes can be injected to indicate a switch from raw data to processed data in the output of the compression system.

2. 发明授权

US4847619A Performance-based reset of data compression dictionary 失效
标题翻译：基于性能的数据压缩字典复位
公开(公告)号：US4847619A
公开(公告)日：1989-07-11
申请号：US109970
申请日：1987-10-19
申请人： Jeff J. Kato , David W. Ruska , David J. Van Maren
发明人： Jeff J. Kato , David W. Ruska , David J. Van Maren
IPC分类号： G06F5/00 , H03M7/30 , H03M7/42 , H03M7/48
CPC分类号： H03M7/42 , H03M7/3084 , H03M7/48
摘要： An adaptive data compression system is reset when performance drops below a predetermined threshold to permit greater compression of long files with evolving distributions of symbol combinations. The compression system uses a resettable dictionary in which initially unassigned codes are strategically assigned to symbol combinations as they are encountered in the data stream.The difference between the bit-lengths of corresponding lengths of the compressor input and output is compared with a value representing a predetermined performance threshold. The dictionary can be reset if the actual performance falls below the performance threshold. The reset can be inhibited while the dictionary is less than half-full to ensure that performance measures are statistically significant. However, if the performance is such that data expansion is occurring, reset is not so delayed.

3. 发明授权

US08788611B2 Method for using partitioning to provide capacity on demand in data libraries 有权
标题翻译：使用分区来提供数据库中的按需容量的方法
公开(公告)号：US08788611B2
公开(公告)日：2014-07-22
申请号：US10033003
申请日：2001-12-28
申请人： Peter Thomas Camble , Jeff J Kato
发明人： Peter Thomas Camble , Jeff J Kato
IPC分类号： G06F15/167 , G06F15/173 , G06F15/16
CPC分类号： G06Q10/04 , G06F3/0608 , G06F3/0644 , G06F3/0686 , G06F21/805
摘要： A method for providing data storage capacity on demand comprises disabling a set of slot elements and data transfer elements of a data library disallowing access to the disabled set by end users of the library, partitioning at least a portion of a set of active data media storage slot elements and active data transfer elements of the data library, exclusive of the disabled set, into partitions for use by the end users; and redefining the sets in response to changes in storage capacity rights of the end users.
摘要翻译：一种根据需要提供数据存储容量的方法包括禁用数据库的一组时隙元素和数据传输元件，所述数据库不允许对库的最终用户访问被禁用的集合，从而划分一组活动数据媒体存储器的至少一部分插槽元素和数据库的活动数据传输元素（不包括禁用集合）分成最终用户使用的分区; 并根据最终用户的存储容量权限的变化重新定义集合。

4. 发明授权

US5210851A High capacity tape drive transparently writes and reads large packets of blocked data between interblock gaps 失效
标题翻译：大容量磁带驱动器在间隔间隙间透明地写入和读取大量阻塞数据
公开(公告)号：US5210851A
公开(公告)日：1993-05-11
申请号：US396879
申请日：1989-08-22
申请人： Jeff J. Kato , David W. Ruska , David J. Van Maren
发明人： Jeff J. Kato , David W. Ruska , David J. Van Maren
IPC分类号： G06F3/06 , G11B20/00 , G11B20/12
CPC分类号： G06F3/0601 , G11B20/1201 , G06F2003/0698 , G11B20/00007
摘要： A tape packet assembler/disassembler (TPAD) for a tape drive accumulates host-transmitted records, which may or may not be blocked by the host. The accumulated host-transmitted records are combined into packets comprising a data portion made up of data blocks and of a trailer portion made up of table entries describing how to disassemble the packet. Host-transmitted commands to write a tape mark are intercepted by the TPAD and replaced by corresponding information in the trailer. Packets are accumulated in a buffer in the TPAD, and are written to the tape drive when the buffer becomes full, or upon a command from the host to reposition the tape, such as rewind. The interblock gaps that would ordinarily separate the host-transmitted records now separate packets, resulting in a considerable increase in the efficiency of tape utilization. The TPAD maintains in the trailer various pointers to assist in forward and back spacing by file and records. It also can automatically and adaptively compress and decompress the user's data. To assist in this it also maintains in the trailer information identifying data blocks containing a dictionary reset.
摘要翻译：用于磁带驱动器的磁带分组汇编器/反汇编器（TPAD）累积主机传输的记录，主机可能被阻止或不被主机阻止。累积的主机发送记录被组合成包括由数据块组成的数据部分和由描述如何拆解分组的表条目组成的预告部分的分组。用于写入磁带标记的主机传输命令被TPAD拦截，并由预告片中的相应信息替换。数据包在TPAD中的缓冲区中累积，并在缓冲区已满时被写入磁带驱动器，或者在主机重新定位磁带的命令时，如倒带。通常将主机传输的记录分离的间隔间隔现在分离数据包，导致磁带利用率的显着提高。 TPAD在拖车中维护各种指针，以通过文件和记录来协助前后间距。它还可以自动和自适应地压缩和解压缩用户的数据。为了协助这一点，它还维护标识包含字典复位的数据块的预告片信息。

5. 发明授权

US5142282A Data compression dictionary access minimization 失效
标题翻译：数据压缩字典访问最小化
公开(公告)号：US5142282A
公开(公告)日：1992-08-25
申请号：US610372
申请日：1990-11-07
申请人： Jeffrey P. Tobin , Carl B. Lantz , Jeff J. Kato
发明人： Jeffrey P. Tobin , Carl B. Lantz , Jeff J. Kato
IPC分类号： G06F5/00 , H03M7/30 , H03M7/40
CPC分类号： H03M7/3084
摘要： A logic circuit in an integrated circuit implementation of an adaptive data compression algorithm which uses a RAM to store dictionary entries. The logic circuit generates predetermined codewords for single-character strings without accessing the dictionary. The logic circuit also generates single-character strings for corresponding codewords without accessing the dictionary.

6. 发明授权

US4891784A High capacity tape drive transparently writes and reads large packets of blocked data between interblock gaps 失效
标题翻译：大容量磁带驱动器在间隔间隙间透明地写入和读取大量阻塞数据
公开(公告)号：US4891784A
公开(公告)日：1990-01-02
申请号：US142180
申请日：1988-01-08
申请人： Jeff J. Kato , David W. Ruska , David J. Van Maren
发明人： Jeff J. Kato , David W. Ruska , David J. Van Maren
IPC分类号： G06F3/06 , G11B20/00 , G11B20/10 , G11B20/12
CPC分类号： G06F3/0601 , G11B20/1201 , G06F2003/0698 , G11B20/00007
摘要： A tape packet assembler/disassembler (TPAD) for a tape drive accumulates host-transmitted records, which may or may not be blocked by the host. The accumulated host-transmitted records are combined into packets comprising a data portion made up of data blocks and a trailer portion made up of table entries describing how to disassemble the packet. Host-transmitted commands to write a tape mark are intercepted by the TPAD and replaced by corresponding information in the trailer. Packets are accumulated in a buffer in the TPAD, and are written to the tape drive when the buffer becomes full, or upon a command from the host to reposition the tape, such as rewind. The interblock gaps that would ordinarily separate the host-transmitted records now separate packets, resulting in a considerable increase in the efficiency of tape utilization. The TPAD maintains in the trailer various pointers to assist in forward and back spacing by file and records. It also can automatically and adaptively compress and decompress the user's data. To assist in this it also maintains in the trailer information identifying data blocks containing a dictionary reset.

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