公开(公告)号：US20040075926A1

公开(公告)日：2004-04-22

申请号：US10673608

申请日：2003-09-30

申请人： Hitachi, Ltd.

发明人： Seiichi Saito ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Junji Shiokawa ,  Osamu Kawamae

IPC分类号： G11B005/09

CPC分类号： G11B20/1813 ,  G11B20/10527 ,  G11B20/1208 ,  G11B20/1809 ,  G11B27/3027 ,  G11B2020/10537 ,  G11B2220/90

摘要： In an apparatus for recording and reproducing a burst-like digital information signal, a methd capable of predicting the time of occurrence of a header indicating the head of the first data of a digital information signal during its reproduction from a recording medium. The digital signal includes a plurality of data blocks each including a header indicative of the head of the block, and each header includes the address of the block. During recording of the digital signal on the recording medium, a plurality of headers which are substantially the same as the headers of the data blocks and including addresses having given relations with the addresses of the data blocks are inserted in a clock regenerating signal recorded before the digital signal for regenerating the clocks for the signal. The headers are inserted at a period equal to the length of each data block so as to be synchronized with the headers of the data blocks.

摘要翻译： 在用于记录和再现突发式数字信息信号的装置中，能够从记录介质预测在其再现期间指示数字信息信号的第一数据的头的头的出现时间的方法。 数字信号包括多个数据块，每个数据块包括指示块的头部的头部，并且每个头部包括块的地址。 在记录介质上记录数字信号的过程中，将与数据块的报头基本相同的多个报头与包含数据块的地址的地址对应的地址进行插入， 数字信号用于再生信号的时钟。 以等于每个数据块的长度的周期插入报头，以便与数据块的报头同步。

公开(公告)号：US20040233803A1

公开(公告)日：2004-11-25

申请号：US10695795

申请日：2003-10-30

申请人： Hitachi, Ltd. ,  Hitachi-LG Data Storage, Inc.

发明人： Osamu Kawamae ,  Taku Hoshizawa

IPC分类号： G11B007/0045

CPC分类号： G11B20/1217 ,  G11B7/0045 ,  G11B27/329

摘要： Conventionally, in a write-once-read-many recording medium, management of recorded/unrecorded areas is required. However, it takes much time to check recorded areas on the whole disk area, and further, the delay of processing is not considered. To solve these problems, information of recorded/unrecorded area management is recorded as a table on a disk, and the table information is regulated so that management information can be efficiently stored. Further, it can be determined whether or not the latest management information is recorded on the disk by using a flag indicating whether or not the table data has been recorded on the disk.

摘要翻译： 通常，在一次写入多次记录介质中，需要管理记录​​/未记录区域。 然而，检查整个磁盘区域的记录区域需要很多时间，此外，不考虑处理延迟。 为了解决这些问题，将记录/未记录区域管理的信息作为表记录在盘上，并且调整表信息，从而可以有效地存储管理信息。 此外，可以通过使用指示表数据是否已经记录在盘上的标志来确定最新的管理信息是否被记录在盘上。

公开(公告)号：US20020167747A1

公开(公告)日：2002-11-14

申请号：US10187298

申请日：2002-07-02

申请人： Hitachi, Ltd.

发明人： Seiichi Saito ,  Toshifumi Takeuchi ,  Masafumi Nakamura ,  Junji Shiokawa ,  Osamu Kawamae

IPC分类号： G11B005/09

CPC分类号： G11B20/1813 ,  G11B20/10527 ,  G11B20/1208 ,  G11B20/1809 ,  G11B27/3027 ,  G11B2020/10537 ,  G11B2220/90

摘要： In an apparatus for recording and reproducing a burst-like digital information signal, a method capable of predicting the time of occurrence of a header indicating the head of the first data of a digital information signal during its reproduction from a recording medium. The digital signal includes a plurality of data blocks each including a header indicative of the head of the block, and each header includes the address of the block. During recording of the digital signal on the recording medium, a plurality of headers which are substantially the same as the headers of the data blocks and including addresses having given relations with the addresses of the data blocks are inserted in a clock regenerating signal recorded before the digital signal for regenerating the clocks for the signal. The headers are inserted at a period equal to the length of each data block so as to be synchronized with the headers of the data blocks.

公开(公告)号：US20020078416A1

公开(公告)日：2002-06-20

申请号：US09931996

申请日：2001-08-17

申请人： Hitachi, Ltd.

发明人： Taku Hoshizawa ,  Shigeki Taira ,  Osamu Kawamae

IPC分类号： H03M013/00

CPC分类号： H03M13/2732 ,  G11B20/18 ,  G11B20/1803 ,  G11B20/1866 ,  H03M13/03 ,  H03M13/271 ,  H03M13/29

摘要： A digital data recording/reproducing method includes the steps of: interleaving data on a PI code for each PI code of a 208-row ECC block; and converting a short burst error into random errors by dispersing errors on the PI codes. Moreover, the digital data recording/reproducing method increases correction capability against several bytes to several tens bytes of errors generated at random without changing burst error correction length by performing this processing for respective PI codes by using interleave rules that are different as much as possible from one another.

摘要翻译： 数字数据记录/再现方法包括以下步骤：对208行ECC块的每个PI代码的PI代码交织数据; 并通过在PI代码上分散错误将短突发错误转换为随机错误。 此外，数字数据记录/再现方法通过使用尽可能不同的交错规则，通过对各个PI代码执行该处理，从而增加了随机产生的几个字节到几十个字节的纠错能力，而不改变突发错误校正长度 另一个。

公开(公告)号：US20020027859A1

公开(公告)日：2002-03-07

申请号：US09935657

申请日：2001-08-24

申请人： HITACHI, LTD.

发明人： Osamu Kawamae ,  Taku Hoshizawa ,  Shigeki Taira ,  Yukari Katayama ,  Makoto Miyamoto ,  Toshifumi Takeuchi

IPC分类号： G11B007/00

CPC分类号： G11B20/0021 ,  G11B7/0045 ,  G11B7/013 ,  G11B20/00086 ,  G11B20/00492 ,  G11B20/00507 ,  G11B20/00557

摘要： A data recording and reproducing method and apparatus with which a stable reproduced signal output can be obtained even when overwriting is carried out repeatedly. When recording data to a rewritable recording medium, in scrambling a first data unit 304, scrambling data 12 is prepared using an initial value 13 generated from random numbers and the first data unit 304 is scrambled with this so that the writing data to be written to the recording medium is converted to data different from the data already recorded in the same position on the recording medium. At this time, the initial value from random numbers used to generate the scrambling data is embedded in a reserve area of the recording medium and at the time of reproduction this is used to carry out descrambling. Desired additional information is also included in the initial value and recorded therewith.

摘要翻译： 即使重复执行重写也可以获得稳定的再现信号输出的数据记录和再现方法和装置。 当将数据记录到可重写记录介质时，在对第一数据单元304进行加扰的情况下，使用从随机数生成的初始值13准备加扰数据12，并且第一数据单元304被加扰，从而将写入数据写入 记录介质被转换成与已记录在记录介质上相同位置的数据不同的数据。 此时，用于产生加扰数据的随机数的初始值被嵌入在记录介质的预留区域中，并且在再现时被用于进行解扰。 所需的附加信息也包含在初始值中并与之记录。

公开(公告)号：US20040042370A1

公开(公告)日：2004-03-04

申请号：US10442361

申请日：2003-05-20

申请人： Hitachi, Ltd.

发明人： Naozumi Sugimura ,  Taku Hoshizawa ,  Osamu Kawamae

IPC分类号： G11B007/0045

CPC分类号： G11B20/1217 ,  G11B27/329 ,  G11B2020/1265 ,  G11B2220/20 ,  G11B2220/218

摘要： An object of the present invention is to provide a recording technique for efficiently using a record area of a recording medium. To achieve the object, in a method for recording data and management information which manages the data onto the recording medium, data 2 is recorded from a position (105) inward from data 1 already recorded on a data recording area having an undetermined data amount, and the management information 2 is recorded from a position (103b) outward from management information 1 already recorded on a management information recording area having an undetermined data amount.

摘要翻译： 本发明的目的是提供一种用于有效地使用记录介质的记录区域的记录技术。 为了实现这一目的，在将数据和管理信息记录在记录介质上的方法中，从已经记录在具有未确定数据量的数据记录区的数据1向内从位置（105）记录数据2， 并且从已经记录在具有未确定数据量的管理信息记录区域的管理信息1向外从位置（103b）记录管理信息2。

公开(公告)号：US20030115536A1

公开(公告)日：2003-06-19

申请号：US10117212

申请日：2002-04-08

申请人： Hitachi, Ltd.

发明人： Osamu Kawamae ,  Taku Hoshizawa ,  Harukazu Miyamoto ,  Shigeki Taira ,  Yukari Katayama

IPC分类号： G11C029/00

CPC分类号： G11B20/00768 ,  G11B20/1217 ,  G11B20/1833 ,  G11B20/1866 ,  G11B27/105 ,  G11B27/329 ,  G11B2020/1222 ,  G11B2020/1265 ,  G11B2020/1292 ,  G11B2020/1294 ,  G11B2020/1836 ,  G11B2220/218 ,  G11B2220/2562

摘要： If a large minimum data unit for recorded data is used to record a small data amount of management information, the recording time is long, and furthermore when a WO (write once) is used as the recording medium, the number of recording operations which can be performed is restricted. To solve the above problems, the present invention can record data in a management area in units smaller than ordinary units for recorded data to suitably record information in a limited management area and thereby efficiently use the user data area. At that time, the present invention simplifies interleave processing usually applied to ordinary recorded data, and performs the simplified interleave processing on a data structure (for data of small size) of the present invention so as to ensure the signal processing compatibility between the ordinary data and data having the data structure according to the present invention.

摘要翻译： 如果用于记录数据的大的最小数据单元用于记录管理信息的小数据量，则记录时间长，此外当使用WO（一次写入）作为记录介质时，可以记录操作的数量 被执行是受限制的。 为了解决上述问题，本发明可以以小于普通单位的单位在管理区域中记录数据以在有限的管理区域中适当地记录信息，从而有效地使用用户数据区域。 此时，本发明简化了通常适用于普通记录数据的交错处理，并且对本发明的数据结构（小尺寸数据）执行简化的交错处理，以确保普通数据之间的信号处理兼容性 以及具有根据本发明的数据结构的数据。