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1. 发明专利

JP2003283343A Data processing apparatus using iterative decoding 有权
标题翻译：数据处理设备使用迭代解码
公开(公告)号：JP2003283343A
公开(公告)日：2003-10-03
申请号：JP2002084257
申请日：2002-03-25
申请人： Fujitsu Ltd , 富士通株式会社
发明人： KANEOKA TOSHITOMO , TAGUCHI MASAKAZU , ITAKURA AKIHIRO
IPC分类号： G06F11/10 , G11B20/10 , H03M13/29 , H03M13/39 , H03M13/45
CPC分类号： H03M13/2957 , H03M13/6331
摘要： PROBLEM TO BE SOLVED: To provide a data signal processing apparatus capable of restoring data even with a relatively few number of iterations, based on more probable likelihood information. SOLUTION: At a data processing apparatus that inputs encoded data obtained by encoding of source data and generates a likelihood information for the source data according to an iterative decoding method, which executes repeatedly a predetermined decoding processing from the encoded data, and restores the source data based on a likelihood information obtained at the process where the decoding processing is repeated, the purpose of this invention is attained by a data processing apparatus that comprises a likelihood information computing, means (500 and 600) for conducting a predetermined computation for a plurality of the likelihood information for the source data obtained at the process where the decoding processing is repeated to generate a new likelihood information, and restores the source data based on the new likelihood information. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种数据信号处理装置，其能够基于更可能的似然信息，即使在相对较少的迭代次数的情况下还原数据。解决方案：在输入通过对源数据进行编码而获得的编码数据的数据处理装置中，根据从编码数据重复执行预定解码处理的迭代解码方法生成源数据的似然信息，并恢复基于在重复解码处理的处理中获得的似然信息的源数据，本发明的目的是通过包括似然信息计算的数据处理装置来实现的，所述装置（500和600）用于对在重复解码处理的处理中获得的源数据的多个似然信息，以生成新似然信息，并且基于新似然信息恢复源数据。版权所有（C）2004，JPO

2. 发明专利

JP2007242066A Mtr encoding method, mtr decoding method, mtr encoder, mtr decoder, and magnetic recording device 审中-公开
标题翻译：地铁编码方法，地铁解码方法，地铁编码器，地铁解码器及磁记录装置
公开(公告)号：JP2007242066A
公开(公告)日：2007-09-20
申请号：JP2006058526
申请日：2006-03-03
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ITAKURA AKIHIRO , KANEOKA TOSHITOMO , ITO TOSHIO
IPC分类号： G11B20/14 , G11B20/18 , H03M7/14 , H03M13/23
CPC分类号： H03M5/145
摘要： PROBLEM TO BE SOLVED: To provide an MTR (maximum transition run) encoding method, and MTR decoding method, an MTR encoder, and an MTR decoder which satisfy the restriction condition of consecutive on-bit and that of the DC component of a signal, and a magnetic recording device therefor.
SOLUTION: The MTR encoder 303b is provided with convolution parts (311a
1 , 311a
2 , ..., 311a
n ) convolving input data using overhead bits T
1 , T
2 , ..., T
n respectively; MTR encoding parts (312a
1 , 312a
2 , ..., 312a
n ) which MTR-encode data convolved by the respective convolution parts; RDS (running sum value) calculation parts (313a
1 , 313a
2 , ..., 313a
n ) and consecutive on-bit checking parts (314a
1 , 314a
2 , ..., 314a
n ) which calculate the RDS of data MTR-encoded by the respective MTR encoding parts and the consecutive on-bit; and a selection part 315 which selects optimal data based on the RDS and the consecutive on-bit.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供满足连续在位的限制条件的MTR（最大过渡运行）编码方法和MTR解码方法，MTR编码器和MTR解码器，一个信号和一个磁记录装置。解决方案：MTR编码器303b具有卷积部分（311a，SB1，S2，S3a，SB2，...），卷积输入数据分别使用开销比特T 1 ，T 2 ，...，T n MTR编码由相应的卷积部分卷积的数据的MTR编码部分（312a 1 ，312a 2 ，...，312a n ）。 RDS（运行总和值）计算部分（313a 1 ，313a 2 ，...，313a n ）和连续的位位检查部件（314a 1 ，314a ，...，314a n ），其计算由各个MTR编码部分编码的数据的RDS 和连续的on-bit; 以及选择部315，其基于RDS和连续的开位选择最优数据。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2006286066A Recording/reproducing device 有权
标题翻译：记录/再现设备
公开(公告)号：JP2006286066A
公开(公告)日：2006-10-19
申请号：JP2005102881
申请日：2005-03-31
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ITAKURA AKIHIRO , UCHIDA AKIYOSHI , UNO KAZUFUMI
IPC分类号： G11B7/004 , G03H1/26 , G11B7/0065
CPC分类号： G11B7/0065 , G11B7/00772 , G11B7/0079 , G11B7/12 , G11B7/28
摘要： PROBLEM TO BE SOLVED: To provide a recording/reproducing device capable of speedily and partially recording/reproducing small-capacity user data and improving the availability of a hologram recording area. SOLUTION: The recording/reproducing device for recording data in a recording medium with a hologram recording part and a buffer recording part is provided with: a hologram recording control part for multiplex-recording user data as the page data of a hologram form in the hologram recording part; a buffer recording control part for recording the user data in the buffer recording part; and a recording control part for controlling recording of the user data requested to be written in the hologram recording part or the buffer recording part when the writing request of the user data is received. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供能够快速和部分地记录/再现小容量用户数据并提高全息图记录区域的可用性的记录/再现装置。解决方案：用于在具有全息图记录部分和缓冲记录部分的记录介质中记录数据的记录/再现装置设置有：全息图记录控制部分，用于将用户数据多路复用记录为全息图形式的页面数据在全息记录部分; 用于将用户数据记录在缓冲记录部分中的缓冲记录控制部分; 以及记录控制部分，用于当接收到用户数据的写入请求时，控制被请求写入全息图记录部分或缓冲记录部分中的用户数据的记录。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2009238341A Magnetic storage control apparatus, magnetic storage control method, and magnetic storage apparatus 有权
标题翻译：磁存储控制装置，磁存储控制方法和磁存储装置
公开(公告)号：JP2009238341A
公开(公告)日：2009-10-15
申请号：JP2008085370
申请日：2008-03-28
申请人： Fujitsu Ltd , 富士通株式会社
发明人： KANEOKA TOSHITOMO , ITAKURA AKIHIRO
IPC分类号： G11B20/14 , G11B20/10
CPC分类号： G11B5/59627 , G11B5/5965 , G11B20/10222 , G11B20/1217 , G11B20/1403 , G11B2020/1242 , G11B2020/1245 , G11B2020/1281 , G11B2020/1484 , G11B2220/2516
摘要： PROBLEM TO BE SOLVED: To provide a magnetic storage apparatus, a magnetic storage control method and a magnetic storage device which can reduce an error of a recording clock.
SOLUTION: The magnetic storage control apparatus for controlling a magnetic storage apparatus that uses a recording medium having a plurality of reference signals on its track and having a data area between the reference signals. The apparatus includes: a measurement section that reproduces the reference signal in a predetermined track of the recording medium and measures, for each data area, the time for a head to scan the data area to obtain a measurement value; a calculation section that calculates a setting value concerning the frequency of a recording clock used in data recording based on the measurement values of a plurality of data areas measured by the measurement section; and a generation section that generates the recording clock based on the measurement values measured by the measurement section and setting value calculated by the calculation section.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种可以减少记录时钟的误差的磁存储装置，磁存储控制方法和磁存储装置。解决方案：一种磁存储控制装置，用于控制在其磁道上使用具有多个参考信号的记录介质并且具有参考信号之间的数据区的磁存储装置。该装置包括：测量部分，其再现记录介质的预定轨道中的参考信号，并且针对每个数据区域测量头扫描数据区域以获得测量值的时间; 计算部，其基于由测量部测量的多个数据区域的测量值，计算与数据记录中使用的记录时钟的频率有关的设定值; 以及生成部，其基于由测量部测量的测量值和由计算部计算出的设定值来生成记录时钟。版权所有（C）2010，JPO＆INPIT

5. 发明专利

JP2005108332A Data reproducing device using repetition decoding and method 审中-公开
标题翻译：使用重复解码和方法的数据再现设备
公开(公告)号：JP2005108332A
公开(公告)日：2005-04-21
申请号：JP2003340913
申请日：2003-09-30
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ITAKURA AKIHIRO
IPC分类号： G06F11/10 , G11B20/10 , G11B20/18 , H03M13/39
摘要： PROBLEM TO BE SOLVED: To provide a data recording and reproducing device using repetition decoding in which an effect of error correction by the repetition decoding is sufficiently demonstrated even when a burst error is included in a reproduced signal.
SOLUTION: This reproducing device for performing reproduction of data from a reproduced signal using repetition decoding has: a read error detecting means for detecting a read error region in the reproduced signal; a reproduced signal probability obtaining means for obtaining a probability value for an expected value of the reproduced signal; a control means for controlling the reproduced signal probability obtaining means so that the probability value for the expected value of the reproduced signal of the read error region becomes equal among all branches in the read error region on the basis of the detection result of the detecting means; and a repetition decoding calculating means for performing repetition decoding calculations using the probability value obtained from the reproduced signal probability obtaining means.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种使用重复解码的数据记录和再现装置，其中即使在再现信号中包括突发错误时，通过重复解码的纠错的效果被充分证明。解决方案：用于使用重复解码从再现信号再现数据的再现装置具有：读出错误检测装置，用于检测再现信号中的读出误差区域; 再现信号概率获取装置，用于获得再现信号的预期值的概率值; 控制装置，用于根据检测装置的检测结果控制再现信号概率获取装置，使读出误差区域的所有分支中的读出误差区域的再现信号的期望值的概率值变为相等 ; 以及重复解码计算装置，用于使用从再现信号概率获取装置获得的概率值来执行重复解码计算。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2009245494A Magnetic storage control apparatus, magnetic storage control method, and magnetic storage device 有权
标题翻译：磁存储控制装置，磁存储控制方法和磁存储装置
公开(公告)号：JP2009245494A
公开(公告)日：2009-10-22
申请号：JP2008089080
申请日：2008-03-31
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ITAKURA AKIHIRO , KANEOKA TOSHITOMO
IPC分类号： G11B5/09 , G11B20/10
CPC分类号： G11B5/59688 , G11B5/5526
摘要： PROBLEM TO BE SOLVED: To provide a magnetic storage control apparatus, magnetic storage control method, and magnetic storage device making compatible synchronization accuracy and format efficiency.
SOLUTION: The magnetic storage control apparatus for controlling a magnetic storage device using a recording medium that is a patterned medium, comprises: a measuring section which reproduces a synchronization mark on a predetermined track of the recording medium and measures a time for a head to scan a data block for each data block between the synchronization marks, as a measurement; a calculation section for calculating a setting value of a recording clock in a plurality of timing within each data block based on the measurements of a plurality of data blocks measured by the measuring section; and a generation section for generating the recording clock on the basis of the setting value calculated by the calculation section.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有兼容同步精度和格式效率的磁存储控制装置，磁存储控制方法和磁存储装置。解决方案：用于使用作为图案化介质的记录介质来控制磁存储装置的磁存储控制装置包括：测量部，其在记录介质的预定轨道上再现同步标记，并测量时间头扫描同步标记之间的每个数据块的数据块作为测量; 计算部分，用于基于由测量部分测量的多个数据块的测量值来计算每个数据块内的多个定时中的记录时钟的设置值; 以及生成部，其基于由计算部计算出的设定值来生成记录时钟。版权所有（C）2010，JPO＆INPIT

7. 发明专利

JP2009116944A Clock generating apparatus, magnetic disk apparatus, and write synchronization method 审中-公开
标题翻译：时钟发生装置，磁盘装置和写同步方法
公开(公告)号：JP2009116944A
公开(公告)日：2009-05-28
申请号：JP2007287893
申请日：2007-11-05
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ITAKURA AKIHIRO
IPC分类号： G11B20/10
CPC分类号： G11B5/59616 , G11B5/855
摘要： PROBLEM TO BE SOLVED: To cope with frequency changes in a sector and to achieve synchronization at high speed.
SOLUTION: A recording apparatus detects a preamble which is a series of patterns formed on a track, and generates a clock based on the preamble. The recording apparatus then detects a Sync mark which is a predetermined pattern formed between the preamble and a Resync mark, calculates a next predicted Resync position, and switches a PLL gain to a low level. The recording apparatus then detects a Resynch mark which is a pattern equal to or more than one pulse to correct the generated clock. Specifically, upon detecting the Resync mark, the recording apparatus compares timing of the predicted position of the Resync with timing at which the Resync mark is detected to correct a write clock.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：应对扇区中的频率变化并实现高速同步。解决方案：记录装置检测作为在轨道上形成的一系列图案的前同步码，并且基于前导码生成时钟。记录装置然后检测同步标记，该同步标记是在前同步码和再同步标记之间形成的预定图案，计算下一个预测的重新同步位置，并将PLL增益切换到低电平。记录装置然后检测等于或大于一个脉冲的模式的再同步标记，以校正所产生的时钟。具体地，在检测到再同步标记时，记录装置将Resync的预测位置的定时与检测到Resync标记的定时进行比较，以校正写入时钟。版权所有（C）2009，JPO＆INPIT

8. 发明专利

JP2008310741A Cache optimizing method and device 审中-公开
标题翻译： CACHE优化方法和设备
公开(公告)号：JP2008310741A
公开(公告)日：2008-12-25
申请号：JP2007160233
申请日：2007-06-18
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ITAKURA AKIHIRO
IPC分类号： G06F3/06 , G06F1/32 , G06F12/08
CPC分类号： Y02D10/13
摘要： PROBLEM TO BE SOLVED: To provide a cache optimizing method and device capable of reducing power consumption. SOLUTION: The device comprises a sector address storage part 1 for inputting a read/write command and storing a request sector address; an access pattern determining part 2 for reading an access pattern stored in the sector address storage part 1, and determining the features of the access pattern from the distribution of the access pattern; a cache configuration optimizing part 3 for receiving the output of the access pattern determining part 2 and changing the number of look-ahead blocks for every feature; and a cache hit determining part 4 receiving the read access pattern and the output of the cache configuration optimizing part 3 to check address distribution, to determine a change of distribution or to compute a cache hit rate to recheck the access pattern and to determine cache access or disk access. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供能够降低功耗的高速缓存优化方法和装置。解决方案：该设备包括用于输入读/写命令并存储请求扇区地址的扇区地址存储部分1; 访问模式确定部分2，用于读取存储在扇区地址存储部分1中的访问模式;以及根据访问模式的分布确定访问模式的特征; 高速缓存配置优化部分3，用于接收访问模式确定部分2的输出并改变每个特征的先行块数; 以及高速缓存命中确定部分4，其接收读取访问模式和高速缓存配置优化部分3的输出以检查地址分布，以确定分配变化或计算高速缓存命中率以重新检查访问模式并确定高速缓存访问或磁盘访问。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2004014033A Information recording/reproduction device, optical disk device and data reproduction method 有权
公开(公告)号：JP2004014033A
公开(公告)日：2004-01-15
申请号：JP2002166899
申请日：2002-06-07
申请人： Fujitsu Ltd , Fujitsu Peripherals Ltd , 富士通周辺機株式会社 , 富士通株式会社
发明人： FURUTA SATOSHI , FUKUDA KATSUHIKO , ITAKURA AKIHIRO
IPC分类号： G11B20/14 , G11B20/18 , H03M13/29 , H03M13/45
CPC分类号： H03M13/3905 , G11B20/1833 , H03M13/2978 , H03M13/6561
摘要： PROBLEM TO BE SOLVED: To provide an information recording/reproduction device which shortens a processing time by performing turbo decode processing to data blocks in parallel and prevents the increase of the circuit scale of a decoder.
SOLUTION: In the information recording/reproducing device comprising a turbo decoder which decodes turbo coded data, the turbo decoder is provided with a plurality of likelihood ratio calculation means, a probability calculation means of forward path of the number fewer than the number of the plurality of likelihood ratio calculation means and a probability calculation means of reverse path of the number fewer than the number of the plurality of likelihood ratio calculation means, the plurality of likelihood ratio calculation means perform calculations of likelihood ratios to a plurality of data blocks in parallel, the probability calculation means of the forward pass performs the probability calculation of the forward path of each data block of the plurality of the data blocks in a time-division manner and the probability calculation means of the reverse path is constituted by the information recording/reproduction device which performs the probability calculation of the reverse path of each data block of the plurality of data blocks in the time-division manner.
COPYRIGHT: (C)2004,JPO

10. 发明专利

JP2008171507A Method for checking vertical magnetic recording medium and system for checking 审中-公开
标题翻译：检查垂直磁记录介质的方法和检查系统
公开(公告)号：JP2008171507A
公开(公告)日：2008-07-24
申请号：JP2007004566
申请日：2007-01-12
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ITAKURA AKIHIRO , KANEOKA TOSHITOMO
IPC分类号： G11B5/00
CPC分类号： G11B20/10009 , G11B5/09 , G11B5/4555 , G11B20/10203 , G11B2005/0029 , G11B2220/2516
摘要： PROBLEM TO BE SOLVED: To reduce an error rate by separating medium noise component of a vertical magnetic recording medium and accurately separating and detecting the medium noise component in a system for checking the performance of the vertical magnetic recording medium.
SOLUTION: Jitter noise and T50 noise which depend on the transition point of magnetization, and DC noise which is added to a DC component are separated and detected from the medium noise component of a perpendicular magnetic recording medium (8) acquired from the reproducing waveform of a magnetic head (1). By adding a base matrix of the DC noise component to a linear separation expression for detecting the noise power from the medium noise component, the DC noise is detected using the least square method, separately from the other medium noise, which depends on the fluctuation of magnetization transition points. Consequently, the performance of the perpendicular magnetic recording medium can be accurately evaluated, and error rate thereof can be reduced.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：通过分离垂直磁记录介质的介质噪声分量并精确地分离和检测用于检查垂直磁记录介质的性能的系统中的介质噪声分量来降低误码率。解决方案：取决于磁化转变点的抖动噪声和T50噪声以及添加到直流分量的直流噪声从从所述直流分量获取的垂直磁记录介质（8）的中等噪声分量中被分离和检测再现磁头（1）的波形。通过将DC噪声分量的基本矩阵添加到用于检测来自中等噪声分量的噪声功率的线性分离表达式，使用最小二乘法检测DC噪声，与其他中等噪声分开，这取决于波动磁化转变点。因此，可以精确地评估垂直磁记录介质的性能，并且可以降低其误码率。版权所有（C）2008，JPO＆INPIT

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