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：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：US20040202092A1

公开(公告)日：2004-10-14

申请号：US10836213

申请日：2004-05-03

申请人： HITACHI, LTD.

发明人： Kouichirou Nishimura ,  Kouichi Hirose ,  Manabu Katsuki ,  Toshifumi Takeuchi

IPC分类号： G11B007/005

CPC分类号： G11B7/005 ,  G11B7/0053 ,  G11B7/0901 ,  G11B7/0941 ,  G11B7/0943 ,  G11B7/0948 ,  G11B2007/0006

摘要： The present invention has an object to stably reproduce wobble signals of all disks of CD-R/RW, DVD-R/RW and DVD-RAM by one wobble signal reproducing circuit. In the wobble signal reproducing circuit, an AGC (AUTOMATIC GAIN CONTROL) circuit for equating a push-pull circuit output of a wide range and an RF amplitude of an optical detector output of two systems obtained by push-pull, and an AGC (AUTOMATIC GAIN CONTROL) circuit for making a wobble amplitude uniform are provided with a function to hold a gain or to change over a response time constant, and at the time of reproduction of the DVD-R/RW, a land pre-pit region is detected by the push-pull output to hold AGC (AUTOMATIC GAIN CONTROL) or change over a response time constant. Besides, in an address information recording region (PID region) at the time of reproduction of the DVD-RAM, the AGC (AUTOMATIC GAIN CONTROL) is held or the response time constant is changed over.

摘要翻译： 本发明的目的是通过一个摆动信号再现电路来稳定地再现CD-R / RW，DVD-R / RW和DVD-RAM的所有磁盘的摆动信号。 在摆动信号再现电路中，用于将宽范围的推挽电路输出与通过推挽获得的两个系统的光检测器输出的RF幅度和AGC（AUTOMATIC）之间进行等效的AGC（自动增益控制）电路 提供摆动幅度均匀的增益控制电路具有保持增益或改变响应时间常数的功能，并且在再现DVD-R / RW时，检测到纹间预制凹坑区域 通过推挽输出保持AGC（自动增益控制）或更改响应时间常数。 此外，在再现DVD-RAM时的地址信息记录区域（PID区域）中，保持AGC（自动增益控制）或者改变响应时间常数。

公开(公告)号：US20030002860A1

公开(公告)日：2003-01-02

申请号：US10126325

申请日：2002-04-19

申请人： Hitachi, Ltd.

发明人： Hiroaki Ono ,  Tatsuya Ishitobi ,  Toshifumi Takeuchi

IPC分类号： H04N005/76 ,  H04N005/225

CPC分类号： H04N5/926 ,  G11B20/10527 ,  G11B2020/1062 ,  H04N5/84 ,  H04N5/945

摘要： When, in the course of recording data to a disk for each basic recording unit, the recording is stopped in the middle of a basic recording unit, data of the basic recording unit of the recording that was stopped remain held in memory. When recording resumes, the recording operation is restarted sequentially from the remaining data held in memory from the position at which recording was stopped. When the remaining data cannot be recorded, dummy data are recorded instead and playback is performed, skipping the dummy data section.

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：US20040126101A1

公开(公告)日：2004-07-01

申请号：US10733319

申请日：2003-12-12

申请人： HITACHI, LTD.

发明人： Masafumi Nakamura ,  Toshifumi Takeuchi

IPC分类号： H04N005/781

CPC分类号： H04N21/236 ,  G11B20/10527 ,  G11B27/034 ,  G11B27/105 ,  G11B27/3063 ,  G11B2220/2545 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/8205 ,  H04N9/8216 ,  H04N21/434

摘要： A method of reproducing data from a recording medium, wherein each of the data includes reference time information indicating a reference time and packet information, includes the steps of rearranging the data on a time axis such that a time interval between adjacent data is equal to a difference between respective reference times indicated by the reference time information of the adjacent data, and outputting the rearranged data at an output rate equal to or greater than a data rate of the data. The packet information includes at least video packet information into which a compressed video signal data stream is divided, and audio packet information into which a compressed audio signal data stream is divided.

摘要翻译： 一种从记录介质再现数据的方法，其中每个数据包括指示参考时间和分组信息的参考时间信息，包括以下步骤：在时间轴上重新排列数据，使得相邻数据之间的时间间隔等于 由相邻数据的参考时间信息指示的各个参考时间之间的差异，并且以等于或大于数据的数据速率的输出速率输出重新排列的数据。 分组信息至少包括被分割了压缩视频信号数据流的视频分组信息，以及压缩音频信号数据流被分割成的音频分组信息。

公开(公告)号：US20010036139A1

公开(公告)日：2001-11-01

申请号：US09865503

申请日：2001-05-29

申请人： Hitachi, Ltd.

发明人： Masayuki Hirabayashi ,  Hideaki Suzuki ,  Masafumi Nakamura ,  Yutaka Nagai ,  Toshifumi Takeuchi

IPC分类号： G11B007/24 ,  G11B007/085 ,  H04N005/76 ,  H04N005/91

CPC分类号： H04N9/8042 ,  G11B7/00745 ,  G11B20/1251 ,  G11B27/005 ,  G11B27/105 ,  G11B27/3027 ,  G11B27/329 ,  G11B2020/1232 ,  G11B2220/20 ,  H04N5/783 ,  H04N5/85

摘要： An optical disk recording thereon compressed moving picture data and an optical disk reproduction apparatus each capable of easily effecting trick play such as high speed reproduction and a retrieval operation at a high speed. Additional information necessary for trick play is recorded in an arbitrary area of an optical disk such as a TOC (Table of Contents) or a leading sector (sector 0) of the disk, and a sector address is added to each sector. To conduct trick play, an I picture, a P picture and a B picture contained in a GOP layer inside a bit stream of compressed image data are extracted and reproduced in accordance with a reproduction speed by looking up a trick play table.

摘要翻译： 在其上记录有压缩运动图像数据的光盘和能够容易地高速再现高速再现和检索操作的特技播放的光盘再现装置。 特殊播放所需的附加信息被记录在诸如盘（目录）或光盘的前导扇区（扇区0）的光盘的任意区域中，并且扇区地址被添加到每个扇区。 为了进行特技播放，通过查找特技播放表，根据再现速度提取并再现包含在压缩图像数据的比特流内的GOP层中的I图像，P图像和B图像。