公开(公告)号：WO1991011001A1

公开(公告)日：1991-07-25

申请号：PCT/GB1991000083

申请日：1991-01-18

Applicant: HEWLETT-PACKARD LIMITED ,  VAN MAREN, David ,  SIMMS, Mark

Inventor： HEWLETT-PACKARD LIMITED

IPC: G11B20/12

CPC classification number: G11B20/1209 ,  G11B27/107 ,  G11B27/3027 ,  G11B27/3063 ,  G11B27/309 ,  G11B27/328 ,  G11B2220/90 ,  G11B2220/913

Abstract: A data storage method for storing user data and associated information on tape, comprising the steps of: writing the data to tape in groups (3) independently of the record structure (Rn) of the data words, wherein each group (3) has an associated index (4) characterised by writting to the index (4) of the relevant groups (3) information about the contents of the group in terms of entities (En), where an entity can contain more than one record (CRn).

Abstract translation: 一种用于在磁带上存储用户数据和相关信息的数据存储方法，包括以下步骤：独立于数据字的记录结构（Rn）将数据写入组（3）中，其中每组（3）具有 相关指数（4），其特征在于写入相关组的索引（4）（3）关于实体（En）的组内容的信息，其中实体可以包含多于一个记录（CRn）。

公开(公告)号：WO1991010997A1

公开(公告)日：1991-07-25

申请号：PCT/GB1991000081

申请日：1991-01-18

Applicant: HEWLETT-PACKARD LIMITED ,  VAN MAREN, David ,  BRAMHALL, Peter

Inventor： HEWLETT-PACKARD LIMITED

IPC: G11B20/00

CPC classification number: G11B20/00007

Abstract: A data storage method for storing compressed user data and associated information on tape (10) comprising the steps of: receiving a stream of user data words organised into a plurality of records; compressing the user data according to a compression algorithm; writing the compressed user data to tape (10) and characterised by also writing to tape information regarding which data compression (DC) algorithm is used to compress a segment of the data on tape comprising one or more records.

Abstract translation: 一种用于在带（10）上存储压缩用户数据和相关信息的数据存储方法，包括以下步骤：接收组织成多个记录的用户数据字流; 根据压缩算法压缩用户数据; 将压缩的用户数据写入磁带（10），其特征在于还向磁带信息写入关于使用哪种数据压缩（DC）算法来压缩包含一个或多个记录的磁带上的数据的段的信息。

公开(公告)号：WO1986006899A1

公开(公告)日：1986-11-20

申请号：PCT/GB1986000220

申请日：1986-04-21

Applicant: HEWLETT-PACKARD LIMITED

Inventor： HEWLETT-PACKARD LIMITED ,  SCOTT, Peter, Michael ,  McFARLANE, William

IPC: H04J03/07

CPC classification number: H04L1/205 ,  H04J3/07 ,  H04J3/14

Abstract: A method and apparatus for measuring the timing jitter of a tributary data stream that has been multiplexed into a higher-rate multiplex stream using pulse stuffing techiques. The required jitter measurement is carried out by monitoring the relevant stuffing control bits of the multiplex stream. In one embodiment, the apparatus comprises a first microprocessor (20) for determining the tributary stuffing ratio from the stuffing control bits, and a second microprocessor (21) operative to determine a current jitter signal value by using both the stuff information contained in the stuffing control bits, and the stuffing ratio determined by the first microprocessor (20). The second microprocessor (21) carries out its task by updating a preceding jitter signal value by incrementing this value each time a stuff occurs while decreasing the jitter signal value at a rate dependent on the stuffing ratio. Preferred algorithms are disclosed for determining both the stuffing ratio and current jitter signal value.

公开(公告)号：WO1985004768A1

公开(公告)日：1985-10-24

申请号：PCT/GB1985000151

申请日：1985-04-04

Applicant: HEWLETT-PACKARD LIMITED ,  CRAWFORD, Gregan, Frederick

Inventor： HEWLETT-PACKARD LIMITED

IPC: H01R23/70

CPC classification number: H01R12/721 ,  H01R13/703 ,  H01R29/00 ,  H01R2201/16 ,  H01R2201/20

Abstract: A printed circuit board connector in which contacts of the connector are self-cleaning as the board is inserted into or extracted from the connector.

Abstract translation: 一种带有触点的印刷电路板连接器，当插卡插入连接器或从连接器中拔出时会自动清洁。

公开(公告)号：WO1987006371A1

公开(公告)日：1987-10-22

申请号：PCT/GB1986000199

申请日：1986-04-10

Applicant: HEWLETT PACKARD LIMITED ,  CRAWFORD, Thomas, Maxton ,  MARTON, Virgil, Nicolae ,  COWAN, Colin, Frederick, Nathaniel

Inventor： HEWLETT PACKARD LIMITED

IPC: G06F15/18

CPC classification number: G06F11/2257 ,  Y10S706/911

Abstract: An expert system comprises processing means (61) which can receive input data and operate on it to produce data indicative of a parameter or parameters which are considered to define or represent the condition of equipment or a system to be diagnosed and which provides an adaptive pattern recognition facility (65) which can be trained or instructed to recognise different combinations of input data as indicative of particular conditions of the equipment. The system is trained by coupling it initially to known good equipment into which definable faults are introduced. The adaptive pattern recognition facility (65) has a series of sections with adjustable weight coefficients which are adjusted in accordance with a given algorithm as successive data combinations associated with the various faults are fed to the system. Once trained the system can diagnose unknown equipment and provide outputs indicative of faults.

Abstract translation: 专家系统包括处理装置（61），其可以接收输入数据并对其进行操作以产生指示被认为定义或表示设备状况或要诊断的系统的参数或参数的数据，并提供自适应模式 识别设备（65），其可以被训练或指示识别输入数据的不同组合，以指示设备的特定条件。 该系统通过将其初始耦合到其中引入可定义的故障的已知的良好设备来进行训练。 自适应模式识别装置（65）具有一系列具有可调整权重系数的部分，这些部分根据给定算法进行调整，因为与各种故障相关联的连续数据组合被馈送到系统。 一旦训练，系统可以诊断未知设备并提供指示故障的输出。

公开(公告)号：WO1986005054A1

公开(公告)日：1986-08-28

申请号：PCT/GB1986000078

申请日：1986-02-17

Applicant: HEWLETT-PACKARD LIMITED ,  DACK, David, George ,  HUCKETT, Eric, Peter ,  MacINTOSH, David, William

Inventor： HEWLETT-PACKARD LIMITED

IPC: H04M03/24

CPC classification number: H04M3/244 ,  H04J3/14

Abstract: An arrangement for selectively accessing and testing a digital telecommunications circuit (1) without detriment to the integrity of a signal carried thereby. The arrangement comprises an access unit (10) inserted in the circuit (1) to be tested, and test equipment (11) connected to the access unit (10) and through which the circuit to be tested can be selectively routed. The test equipment (11) includes a shift register (24) in its test circuit path. In order to match the delay introduced by the shift register (24) in the test circuit path, a similar clocked delay (21) is included in the access unit in the route followed by the telecommunications circuit (1) when undiverted. This delay matching avoids signal loss repetition when switching the circuit to be tested between its undiverted and diverted paths. Where the test equipment (1) is used to insert the test data into the diverted circuit, provision is made to avoid the introduction of bipolar-coding violations into bipolar signals carried by the circuit.

公开(公告)号：WO1986002192A1

公开(公告)日：1986-04-10

申请号：PCT/GB1985000452

申请日：1985-10-08

Applicant: HEWLETT-PACKARD LIMITED ,  DIMOND, Steven, Andrew ,  ESCUDER, Manuel, Angel ,  WILKINSON, Benjamin, Charles, Noel

Inventor： HEWLETT-PACKARD LIMITED

IPC: G11B15/68

CPC classification number: G11B15/6835

Abstract: A cartridge-handling arrangement (12, 42, 64, 70) is provided for selectively transferring a tape cartridge from a fixed store (116) holding a plurality of cartridges in a vertical stack, to a fixed record/playback station (162). The cartridge-handling arrangement comprises an elevator platform (42) moving between the appropriate store level and the level of the record/playback station (162), and a displacement mechanism for transferring a selected cartridge between the store (116) and the elevator platform (42) and between the elevator platform (42) and the record/playback station (162). The overall arrangement is such that a selected cartridge is presented to the record/playback station (162) in a horizontal attitude.

Abstract translation: 提供了盒式磁带处理装置（12,42,64,70），用于选择性地将保持多个盒式磁带的固定存储器（116）的带盒从垂直堆叠传送到固定记录/重放站（162）。 盒式处理装置包括在适当的存储级别和记录/重放站（162）的级别之间移动的电梯平台（42），以及用于在存储器（116）和电梯平台（116）之间传送所选择的盒式磁带的位移机构 （42）和电梯平台（42）与记录/重放站（162）之间。 整体布置使得所选择的墨盒以水平姿态呈现到记录/回放站（162）。

公开(公告)号：WO1991010999A1

公开(公告)日：1991-07-25

申请号：PCT/GB1991000084

申请日：1991-01-18

Applicant: HEWLETT-PACKARD LIMITED ,  VAN MAREN, David

Inventor： HEWLETT-PACKARD LIMITED

IPC: G11B20/00

CPC classification number: G11B20/00007 ,  H03M7/3088

Abstract: A method for compressing user data for storing on tape (10) comprising the steps of: receiving a stream of user data words organised into a plurality of records (CRn); compressing the user data according to a compression algorithm involving converting at least some of the user data to codewords using a dictionary which is derived from the data; characterised by carrying out a plurality of flush operations (F) between starting consecutive dictionaries.

Abstract translation: 一种用于压缩用于存储在磁带（10）上的用户数据的方法，包括以下步骤：接收组织成多个记录（CRn）的用户数据字流; 根据压缩算法压缩用户数据，该压缩算法涉及使用从数据导出的字典将至少一些用户数据转换为码字; 其特征在于在开始连续的字典之间执行多次冲洗操作（F）。

公开(公告)号：WO1995022826A1

公开(公告)日：1995-08-24

申请号：PCT/GB1995000332

申请日：1995-02-16

Applicant: HEWLETT-PACKARD LIMITED ,  HEWLETT-PACKARD COMPANY ,  SONY CORPORATION ,  WATKINS, Mark, Robert ,  RUSHTON, Nigel ,  OZAKI, Shinya

Inventor： HEWLETT-PACKARD LIMITED ,  HEWLETT-PACKARD COMPANY ,  SONY CORPORATION

IPC: G11B27/30

CPC classification number: G11B20/1209 ,  G11B27/032 ,  G11B27/036 ,  G11B27/107 ,  G11B27/11 ,  G11B27/3027 ,  G11B27/3063 ,  G11B27/328 ,  G11B2220/65 ,  G11B2220/90 ,  G11B2220/913

Abstract: Data are stored on magnetic tape along successive tracks extending obliquely across the tape, in each of several areas including a lead-in area, a data area and an end-of-data (EOD) area. Each track comprises successive blocks or fragments of data, and each fragment has a compact header containing a synchronization byte, six information bytes and two parity bytes. The information bytes include a fragment ID, an area ID sub code identifying the area in which the fragment is located, and various other sub codes relating to logical structure of the data. The inclusion of an area ID sub code and logical structure sub codes in the (compact) header of every fragment facilitates reliable searching of the data stored on the tape at high tape advance speeds.

Abstract translation: 数据沿着包括导入区域，数据区域和数据结束（EOD））区域的多个区域中的每一个中沿着磁带倾斜延伸的连续轨道存储在磁带上。 每个轨道包括连续的块或数据片段，并且每个片段具有包含同步字节，六个信息字节和两个奇偶校验字节的紧凑标题。 信息字节包括片段ID，识别片段所在区域的区域ID子代码以及与数据的逻辑结构相关的各种其他子代码。 在每个片段的（紧凑）头部中包括区域ID子代码和逻辑结构子代码便于以高带速提前速度可靠地搜索存储在磁带上的数据。

公开(公告)号：WO1995015551A1

公开(公告)日：1995-06-08

申请号：PCT/GB1994002664

申请日：1994-12-05

Applicant: HEWLETT-PACKARD LIMITED ,  HEWLETT-PACKARD COMPANY ,  HARDWICK, John, Patrick ,  WILLIAMS, Christopher, Huw

Inventor： HEWLETT-PACKARD LIMITED ,  HEWLETT-PACKARD COMPANY

IPC: G11B05/09

CPC classification number: G11B5/09 ,  G11B5/00878 ,  G11B5/00891 ,  G11B20/10009

Abstract: A Digital Data Storage (DDS) data storage mechanism for reading DDS tapes containing data at either 61 kbpi or 122 kbpi has two circuits for recovering data from signals induced in a magnetic head by magnetic patterns on the tape. One circuit (90) incorporates a clipping amplifier (92), a phase-locked loop (PLL) (94), and a latch (96) to sample the two-level signal obtained at 61 kbpi, at times defined by clock pulses from the PLL. The second circuit (100) incorporates a PR-1 partial-response maximum-likelihood (PRML) detector (110) to decode the three-level signal obtained at 122 kbpi. The cosine frequency response characteristic of the PR-1 channel facilitates use of the same rotary head drum and magnetic head gap for reading tapes at either bit density.

Abstract translation: 用于读取包含61kbpi或122kbpi数据的DDS磁带的数字数据存储（DDS）数据存储机制具有两个电路，用于通过磁带上的磁性图案从磁头中感应的信号中恢复数据。 一个电路（90）包括限幅放大器（92），锁相环（PLL）（94）和锁存器（96），以对由61kbpi获得的两电平信号进行采样，时间由 PLL。 第二电路（100）包含PR-1部分响应最大似然（PRML）检测器（110），以解码以122kbpi获得的三电平信号。 PR-1通道的余弦频率响应特性有助于使用相同的旋转磁头鼓和磁头间隙，以便以任一位密度读取磁带。