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11. 发明申请

US20070174755A1 Post viterbi error correction apparatus and related methods 失效
标题翻译：维特比纠错装置及相关方法
公开(公告)号：US20070174755A1
公开(公告)日：2007-07-26
申请号：US11655969
申请日：2007-01-22
申请人： Jun Lee , Takao Sugawara
发明人： Jun Lee , Takao Sugawara
IPC分类号： H03M13/00
CPC分类号： H03M13/451 , H03M13/3738 , H03M13/6343
摘要： A Post-Viterbi processor generates a plurality of candidate codewords based on a plurality of dominant error patterns for a particular communication channel. The Post-Viterbi processor selects one among the candidate codewords as a corrected codeword upon determining that the candidate codeword is error free.
摘要翻译：后维特比处理器基于用于特定通信信道的多个主要误差模式来生成多个候选码字。后维特比处理器在确定候选码字是无错误之后，在候选码字中选择一个作为校正码字。

12. 发明授权

US07248425B2 Disk writing/reproducing apparatus and method 失效
标题翻译：磁盘写入/再现装置和方法
公开(公告)号：US07248425B2
公开(公告)日：2007-07-24
申请号：US11302379
申请日：2005-12-14
申请人： Yong-kyu Byun , Takao Sugawara
发明人： Yong-kyu Byun , Takao Sugawara
IPC分类号： G11B5/09 , G11B27/36 , G11B5/596
CPC分类号： G11B5/40 , G11B5/02 , G11B19/04 , G11B20/10009 , G11B2005/001
摘要： A disk writing apparatus includes: a temperature sensor sensing an ambient temperature of a disk; a sync mark generator generating a sync mark having a pattern when a writing temperature indicating an ambient temperature at which data is written on the disk is sensed, wherein the pattern of the sync mark corresponds to the sensed writing temperature; a writing controller outputting the writing temperature sensed by the temperature sensor to the sync mark generator; a multiplexer adding the sync mark generated by the sync mark generator to the data; and a writing unit writing the data to which the sync mark is added on the disk. Accordingly, error rates when data is written and when data is reproduced can be improved by optimally compensating for the disk writing temperature and the disk reproducing temperature using parameters of devices of an hard disk drive.
摘要翻译：磁盘写入装置包括：感测盘的环境温度的温度传感器; 感测到当指示将数据写在盘上的环境温度的写入温度时产生具有图案的同步标记发生器，其中同步标记的图案对应于感测到的写入温度; 写入控制器，将由温度传感器感测到的写入温度输出到同步标记发生器; 多路复用器将由同步标记产生器产生的同步标记加到数据中; 以及写入单元将在其上添加了同步标记的数据写入到磁盘上。因此，通过使用硬盘驱动器的设备的参数最佳地补偿磁盘写入温度和磁盘再现温度，可以提高数据写入和数据再现时的错误率。

13. 发明授权

US07237173B2 Recording and reproducing apparatus, signal decoding circuit, error correction method and iterative decoder 有权
标题翻译：记录和再现装置，信号解码电路，纠错方法和迭代解码器
公开(公告)号：US07237173B2
公开(公告)日：2007-06-26
申请号：US10161228
申请日：2002-06-03
申请人： Toshihiko Morita , Yuichi Sato , Takao Sugawara
发明人： Toshihiko Morita , Yuichi Sato , Takao Sugawara
IPC分类号： H03M13/00 , H03M13/03 , H03D1/00
CPC分类号： H03M13/2957 , G11B20/10009 , G11B20/18 , H03M13/373 , H03M13/3905 , H03M13/6343
摘要： A recording and reproducing apparatus having an ECC-less error correction function, includes an erasure detector generating an erasure flag indicating erasure of a read signal; and an iterative decoder having two soft-in/soft-out (SISO) decoders, i.e., an inner decoder and an outer decoder, and correcting the erasure by inputting the erasure flag ek into the inner decoder and performing erasure compensation in the inner decoder. As the erasure compensation in the inner decoder, channel information is masked while the erasure flag is on. The erasure of data due to a media defect is detected inside the iterative decoder, and the second erasure flag is inputted into the inner decoder to perform erasure compensation in the inner decoder.
摘要翻译：具有无ECC纠错功能的记录和再现装置包括产生擦除标志的擦除检测器，擦除标志指示读取信号的擦除; 以及具有两个软入/去输出（SISO）解码器（即，内解码器和外解码器）的迭代解码器，并且通过将擦除标志e k k输入到内解码器来校正擦除并在内部解码器中执行擦除补偿。作为内部解码器的擦除补偿，当擦除标志为开时，通道信息被屏蔽。在迭代解码器内部检测到由于介质缺陷导致的数据擦除，并且第二擦除标志被输入到内部解码器，以在内部解码器中执行擦除补偿。

14. 发明申请

US20070121233A1 Information recording and reproducing apparatus 审中-公开
标题翻译：信息记录和再现装置
公开(公告)号：US20070121233A1
公开(公告)日：2007-05-31
申请号：US11606074
申请日：2006-11-30
申请人： Takao Sugawara , Yusuke Kanayama , Jun Lee , Won-choul Yang
发明人： Takao Sugawara , Yusuke Kanayama , Jun Lee , Won-choul Yang
IPC分类号： G11B20/10
CPC分类号： G11B20/10009 , G11B20/10333
摘要： An information recording and reproducing apparatus which records information on a medium and reproduces information stored on the medium includes a write compensation circuit configured to perform compensation of the information recorded on the medium, wherein the write compensation circuit corrects, in advance, an asymmetry of a signal read from the medium by correcting a write signal in a pulse form along a time axis, and an amount of correction along the time axis is based on information included in the write signal.
摘要翻译：在介质上记录信息并再现存储在介质上的信息的信息记录和再现装置包括写入补偿电路，其被配置为对记录在介质上的信息进行补偿，其中写入补偿电路预先校正一个通过沿着时间轴校正脉冲形式的写入信号从介质读取信号，并且沿着时间轴的校正量基于包括在写入信号中的信息。

15. 发明授权

US07138931B2 Recording and reproducing apparatus 有权
标题翻译：记录和再现设备
公开(公告)号：US07138931B2
公开(公告)日：2006-11-21
申请号：US10982610
申请日：2004-11-05
申请人： Toshio Ito , Masaru Sawada , Toshihiko Morita , Takao Sugawara
发明人： Toshio Ito , Masaru Sawada , Toshihiko Morita , Takao Sugawara
IPC分类号： H03M7/00
CPC分类号： H03M5/145 , G11B20/1426
摘要： A recording and reproducing apparatus includes an RLL encoder that encodes an information bit string to a code bit string and a RLL decoder that decodes the code bit string to the information bit string. The RLL encoder encodes the information bit string to the code bit string of a run-length-limited code at a high encoding rate satisfying a plurality of conditions of constraint regarding a string of successive zeros. The RLL decoder decodes the code bit string encoded by the RLL encoder to the information bit string.
摘要翻译：记录和再现装置包括将信息位串编码为码位串的RLL编码器和将码位串解码为信息位串的RLL解码器。 RLL编码器以满足关于连续零串的多个约束条件的高编码率将信息位串编码为游程长度受限码的码位串。 RLL解码器将由RLL编码器编码的码位串解码为信息位串。

16. 发明授权

US07110199B2 Information recording and reproducing apparatus, signal decoding circuit, and information recording medium and method 失效
标题翻译：信息记录和再现装置，信号解码电路和信息记录介质及方法
公开(公告)号：US07110199B2
公开(公告)日：2006-09-19
申请号：US10002861
申请日：2001-11-15
申请人： Takao Sugawara , Kazuhito Ichihara
发明人： Takao Sugawara , Kazuhito Ichihara
IPC分类号： G11B5/09
CPC分类号： G11B5/012 , G11B7/00 , G11B20/1426
摘要： Upon data recording, a data recording unit inserts revise bytes as a predetermined specific code train into at least two or more portions including the head and last portions of data and records the data onto a medium. Upon data reproduction, a data reproducing unit separates a head reproduced signal by using clocks and, thereafter, executes a clock extraction and an amplitude correction by using a signal corresponding to the revise bytes as a specific code train. In principle, an RLL code for the clock extraction and gain tracking is eliminated and, in place of the RLL code, the revise bytes comprising the specific code train are inserted into the data and the data is recorded onto the medium.
摘要翻译：在数据记录时，数据记录单元将修改字节作为预定的特定代码串插入包括数据的头部和最后部分的至少两个或多个部分中，并将数据记录到介质上。在数据再现时，数据再现单元通过使用时钟分离头重放信号，然后通过使用与修改字节对应的信号作为特定代码串来执行时钟提取和幅度校正。原则上，消除了用于时钟提取和增益跟踪的RLL代码，并且代替RLL代码，将包括特定码串的修改字节插入到数据中，并将数据记录在介质上。

17. 发明申请

US20060181797A1 Information recording and reproducing apparatus and method, and signal decoding circuit for performing timing recovery 失效
公开(公告)号：US20060181797A1
公开(公告)日：2006-08-17
申请号：US11388377
申请日：2006-03-24
申请人： Takao Sugawara , Motomu Takatsu , Masaru Sawada
发明人： Takao Sugawara , Motomu Takatsu , Masaru Sawada
IPC分类号： G11B5/09 , G11B5/035
CPC分类号： G11B20/10009 , G11B5/09 , G11B20/18
摘要： A timing recovery unit detects a phase offset and a frequency offset from a head area of reproduction data and initially corrects them. The timing recovery unit stores data in which a head reproduction signal has been made to be discrete by a fixed clock into a buffer. A phase offset detector detects the phase offset from the data head area in parallel with the operation for writing the data into the buffer. At the same time, a frequency offset detector detects the frequency offset from the data head area in parallel with the operation for writing the data into the buffer. A correction value of the detected phase offset and a correction value of the detected frequency offset are initially set into a digital PLL. While the data is read out from the buffer, a frequency lead-in and a phase lead-in are executed in the head area.

18. 发明授权

US07035029B2 Method of and apparatus for recording/reading information, circuit for recording/reading signal 失效
标题翻译：用于记录/读取信息的方法和装置，用于记录/读取信号的电路
公开(公告)号：US07035029B2
公开(公告)日：2006-04-25
申请号：US10776748
申请日：2004-02-11
申请人： Masaru Sawada , Toshihiko Morita , Takao Sugawara
发明人： Masaru Sawada , Toshihiko Morita , Takao Sugawara
IPC分类号： G11B5/09
CPC分类号： G11B20/1025 , G11B5/012 , G11B20/1403 , G11B20/1426 , G11B27/3027 , G11B2220/20
摘要： An information recording/reading apparatus employs a preamble to reproduce a clock used when recording information in a recording medium and reads the information out of the recording medium at a timing synchronized with a read signal. The preamble is split and recorded by replacing a middle portion of the preamble with data and a sync byte. While a first buffer is employed to delay signal data read out of the recording medium, a frequency offset detector detects a frequency offset using the split preamble.
摘要翻译：信息记录/读取装置采用前导码来再现在记录介质中记录信息时使用的时钟，并且以与读取信号同步的定时将信息从记录介质读出。通过用数据和同步字节代替前导码的中间部分来分割和记录前导码。当使用第一缓冲器来延迟从记录介质读出的信号数据时，频率偏移检测器使用分离前导码检测频率偏移。

19. 发明授权

US07054088B2 Information recording and reproducing apparatus and method, and signal decoding circuit for performing timing recovery 失效
公开(公告)号：US07054088B2
公开(公告)日：2006-05-30
申请号：US10273485
申请日：2002-10-18
申请人： Akihiro Yamazaki , Takao Sugawara , Motomu Takatsu , Masaru Sawada
发明人： Akihiro Yamazaki , Takao Sugawara , Motomu Takatsu , Masaru Sawada
IPC分类号： G11B5/35
CPC分类号： G11B20/10009 , G11B5/09 , G11B20/18
摘要： A timing recovery unit detects a phase offset and a frequency offset from a head area of reproduction data and initially corrects them. The timing recovery unit stores data in which a head reproduction signal has been made to be discrete by a fixed clock into a buffer. A phase offset detector detects the phase offset from the data head area in parallel with the operation for writing the data into the buffer. At the same time, a frequency offset detector detects the frequency offset from the data head area in parallel with the operation for writing the data into the buffer. A correction value of the detected phase offset and a correction value of the detected frequency offset are initially set into a digital PLL. While the data is read out from the buffer, a frequency lead-in and a phase lead-in are executed in the head area.

20. 发明申请

US20050066261A1 Method, apparatus, and circuit for record reproduction 有权
标题翻译：用于记录再现的方法，装置和电路
公开(公告)号：US20050066261A1
公开(公告)日：2005-03-24
申请号：US10869585
申请日：2004-06-16
申请人： Toshihiko Morita , Mitsuhiko Ohta , Takao Sugawara
发明人： Toshihiko Morita , Mitsuhiko Ohta , Takao Sugawara
IPC分类号： G06F11/08 , G06F11/10 , G11B20/14 , G11B20/18 , H03M7/14 , H03M13/00 , H03M13/09 , H03M13/11 , H03M13/17 , H03M13/19
CPC分类号： H03M13/6325 , G11B20/1833 , G11B20/1866 , G11B2020/1863 , H03M13/1102 , H03M13/1515 , H03M13/17 , H03M13/3746
摘要： A record reproduction apparatus includes an encoding unit that encodes sector data to be written into a recording medium, by dividing the data into a predetermined number of blocks, and an iterative decoding unit that iteratively decodes the sector data read from the recording medium, by dividing the sector data into the predetermined number of blocks.
摘要翻译：记录重放装置包括编码单元，其通过将数据划分成预定数量的块来编码要写入记录介质的扇区数据，以及迭代解码单元，其对从记录介质读取的扇区数据进行迭代解码，将扇区数据转换成预定数量的块。

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