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公开(公告)号：JP2000188553A
公开(公告)日：2000-07-04
申请号：JP5199
申请日：1999-01-04
Applicant: IBM
Inventor： JAQUETTE GLEN A , WASHBURN GORDON LEON
Abstract: PROBLEM TO BE SOLVED: To reduce the cost of an inexpensive or expensive system by using the same input/output data compression module. SOLUTION: A master data compression module 10 has non-compression data input/output terminals, data compressor/expander, a data flow manager and compressed data input/output terminals. Furthermore, the system has a dual data compression module 11 of the same configuration as that of the module 10. Tandem control of this system instructs the master data flow manager to control compressed data input/output and instructs a dual data flow manager to give up the control. Dual port active/slave control in response to reception of an input at either of non-compression data input/output terminals sets non- compensation data input/output terminals of a module not receiving the input in an idle state and instructs a module receiving an input on input/output of non-compression data. Then a module in a slave state expands input data going to be compressed and a data comparator detects propriety of master data compression.
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公开(公告)号：SK154494A3
公开(公告)日：1995-05-10
申请号：SK154494
申请日：1993-05-19
Applicant: IBM , IBM DEUTSCHLAND
Inventor： JAQUETTE GLEN A , TAYEFEH MOROVAT
Abstract: A circuit for simultaneously detecting both MO and ROM signals reflected from an optical disk so that both signals are present and useable without switching from one to the other. The circuit eliminates switching time and switching transients. Two photodetectors are arranged to sense P and S components of polarized light in order to stimulate a differential amplifier and produce an output representative of MO recorded data. A second amplifier is connected to at least one of the photodetectors to produce an output representative of ROM recorded data and also representative of defects in the MO portion of the optical disk.
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公开(公告)号：JP2005063444A
公开(公告)日：2005-03-10
申请号：JP2004235007
申请日：2004-08-12
Applicant: Internatl Business Mach Corp
, インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation Inventor： JAQUETTE GLEN A
CPC classification number: G11B15/005 , G11B5/00813 , G11B5/4893 , G11B5/584 , G11B5/86 , G11B15/04 , G11B15/125 , G11B20/10 , G11B2020/1062 , G11B2020/10962
Abstract: PROBLEM TO BE SOLVED: To provide a method for storing data allowing a data-sent entity to erase its data by physically writing the data to a tape before issuing a command completion response. SOLUTION: A recording system of a magnetic tape drive is operated to cause one separate set of write heads to write the data discontinuously to the magnetic tape as received, and to save the data, and during the same operation, to cause another separate set of write heads to rewrite the data to the magnetic tape in a continuous arrangement. The writing may be made in parallel and simultaneous. Thus, during the same operation, and at the same time, the separate sets of the plurality of write heads, temporarily write the received data to the magnetic tape so that a sender can erase its copy, and rewrite the saved data to the magnetic tape in a permanent arrangement, without waiting to complete first writing the received data, to complete subsequently rewriting the data and repeating a series of this flow. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：提供一种用于存储允许数据发送实体通过在发出命令完成响应之前将数据物理写入磁带来擦除其数据的数据的方法。
解决方案：操作磁带驱动器的记录系统以使一组单独的写入头将数据不连续地写入磁带，并且保存数据，并在相同的操作期间引起另一组写入 单独的写入头组以连续的布置将数据重写到磁带。 写作可以并行和同时进行。 因此，在相同的操作期间，并且同时，多个写入头的单独的组将临时写入所接收的数据到磁带，使得发送者可以擦除其副本，并将保存的数据重写到磁带 在永久安排中，无需等待完成首次写入接收的数据，完成后续重写数据并重复一系列此流程。 版权所有（C）2005，JPO＆NCIPI
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公开(公告)号：JPH11261423A
公开(公告)日：1999-09-24
申请号：JP32767598
申请日：1998-11-18
Applicant: IBM
Inventor： JAQUETTE GLEN A
Abstract: PROBLEM TO BE SOLVED: To decide an FIFO compression efficiency based on a bit length of a token of each variable size by selecting a compression mode of input data only when a compression efficiency of a current mode indicates that the efficiency is higher than a compression efficiency in other modes. SOLUTION: Data compressors 40, 41 give information relating to a length of a code word to a comparison logic 59 via signal lines 56, 57 respectively for FIFO comparison of compression efficiencies in each mode. No inter-mode changeover takes place till it is considered that saving relating to a length of data is in matching with a threshold value in direct relation to sacrifice of swapping. Thus, so long as a compression efficiency in the current mode is higher than a compression efficiency in other modes based on threshold value comparison, a mode to compress input data is selected. Furthermore, the threshold value is in direct relation to number of bits of a multi-bit mode changeover characters.
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公开(公告)号：CA2081179C
公开(公告)日：1996-12-17
申请号：CA2081179
申请日：1992-10-22
Applicant: IBM
Inventor： JAQUETTE GLEN A , KULAKOWSKI JOHN E , MCDOWELL JUDSON A , MEANS RODNEY J
IPC: G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10
Abstract: Data-storing disks, preferably each disk having a single spiral track, have addressable tracks that are independent of the length of disk or spiral track revolutions. Each revolution may contain a non-integral number of addressable tracks and sectors. An optical disk is used to describe the invention. The circumferential location of the tracks and sectors precess circumferentially. A plurality of radially disposed revolution bands each contain a fixed number of the revolutions an increasing number of the addressable tracks in the radially outer more ones of the bands. It is preferred that the number of bands be 2n, where n is an integer. Each band is divided into a plurality of revolution groups, each group having a fixed number of revolutions. Each group in a band has a like number of the addressable tracks. A so-called anchor sector has one end anchored to a reference circumferential position on the disk. Each revolution group begins with an anchor sector, all other sectors in the group are positioned circumferentially with respect to the anchor sector. Addressable track seeking, alternate embodiments and fabrication of a disk are described.
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Patent Agency Ranking
公开(公告)号：BR9202157A
公开(公告)日：1993-02-02
申请号：BR9202157
申请日：1992-06-05
Applicant: IBM
Inventor： CARDEIRO SILVIO ANTONIO , JAQUETTE GLEN A
Abstract: When optical disk recorder having readback circuits is used with pulse width modulated (PWM) signals a phase error of a clocking system with respect to the phase of a data signal is used to generate an amplitude detection threshold offset for servoing of the amplitude detection threshold by the phase error signals tending to increase the probability of faithful detection of data carried by the PWM or other signals.
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公开(公告)号：CA2064633A1
公开(公告)日：1992-12-18
申请号：CA2064633
申请日：1992-04-01
Applicant: IBM
Inventor： CARDERO SILVIO A , JAQUETTE GLEN A
Abstract: When optical disk recorder having readback circuits is used with pulse width modulated (PWM) signals a phase error of a clocking system with respect to the phase of a data signal is used to generate an amplitude detection threshold offset for servoing of the amplitude detection threshold by the phase error signals tending to increase the probability of faithful detection of data carried by the PWM or other signals.
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公开(公告)号：PL170774B1
公开(公告)日：1997-01-31
申请号：PL30641393
申请日：1993-05-19
Applicant: IBM
Inventor： JAQUETTE GLEN A , TAYEFEH MOROVAT
Abstract: A circuit for simultaneously detecting both MO and ROM signals reflected from an optical disk so that both signals are present and useable without switching from one to the other. The circuit eliminates switching time and switching transients. Two photodetectors are arranged to sense P and S components of polarized light in order to stimulate a differential amplifier and produce an output representative of MO recorded data. A second amplifier is connected to at least one of the photodetectors to produce an output representative of ROM recorded data and also representative of defects in the MO portion of the optical disk.
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公开(公告)号：CA2081179A1
公开(公告)日：1993-08-05
申请号：CA2081179
申请日：1992-10-22
Applicant: IBM
Inventor： JAQUETTE GLEN A , KULAKOWSKI JOHN E , MCDOWELL JUDSON A , MEANS RODNEY J
IPC: G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10
Abstract: The present invention relates to a data storage device comprising a circular disc (30), a data storage medium on at least one surface of the disc, a spiral track extending within the storage medium about the axis of the disc, and a plurality of data storage sectors formed on the track. According to the invention the storage device is characterised in that the storage medium is formed with a reference mark (100) extending radially from the axis of the disc, and the data storage sectors are arranged in groups extending along the spiral track, one end of each group of sectors being located adjacent to one of the points of intersection of the reference mark with the spiral track.
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10.发明专利
公开(公告)号：CA2046707A1
公开(公告)日：1992-04-02
申请号：CA2046707
申请日：1991-07-10
Applicant: IBM
Inventor： JAQUETTE GLEN A , JUSTO ROGER J
Abstract: TU9-90-023 OPTICAL DISK PLAYERS HAVING READBACK CIRCUITS WITH NOISE REJECTION AND READ SIGNAL RETIMING In an optical disk player, such as for a magnetooptic player, wherein the data recorded on the optical medium are at recording at such high densities then intersymbol interference causes the peaks of the readback signals to become closer together resulting in phase errors. A transition selecting means is operative to select a transition indicated by the readback signal or a substitute transition indicated by a timed delay means generates a signal based upon the immediately preceding transition received from optical medium. Various embodiments of the invention are illustrated.
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