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59 条记录 (耗时 0.012 秒)

    OPTICAL STORAGE DEVICE, AND OPTICAL STORAGE MEDIUM READING/WRITING METHOD
    16.
    发明公开
    OPTICAL STORAGE DEVICE, AND OPTICAL STORAGE MEDIUM READING/WRITING METHOD 审中-公开
    OPTISCHE SPEICHEREIRICHTUNG UND LESE- / SCHREIBVERFAHRENFÜREIN OPTISCHES SPEICHERMEDIUM

    公开(公告)号：EP1498890A4

    公开(公告)日：2008-06-11

    申请号：EP02718578

    申请日：2002-04-15

    申请人： FUJITSU LTD

    发明人： AOYAMA NOBUHIDE ,  MORIMOTO YASUAKI

    IPC分类号： G11B20/10 ,  G11B7/00 ,  G11B7/007 ,  G11B11/00 ,  G11B11/105 ,  G11B13/04 ,  G11B20/12

    CPC分类号： G11B7/0079 ,  G11B11/10515 ,  G11B11/10521 ,  G11B11/10584 ,  G11B11/10597 ,  G11B20/10527 ,  G11B2020/10546 ,  G11B2020/1062 ,  G11B2020/10962 ,  G11B2020/1259 ,  G11B2020/1287 ,  G11B2020/1461 ,  G11B2020/1843

    摘要： In order to perform RAM recording of new information related to ROM information at the position linked to ROM information of an optical information recording medium while continuously reproducing ROM information of the optical information recording medium, there is provided an optical head (5) which irradiates the light to the optical information recording medium (4) having an optical magnetic recording film formed on a substrate where a phase pit is formed, detects the light intensity modulated by the phase pit as a ROM signal from the return light from the optical information recording medium, and detects as a RAM signal a differential amplitude of the component in the polarized direction in which the return light is modulated by the optical magnetic recording film. The ROM signal is read at n-time speed (n>2) and converted into the reference speed and outputted, and input information related to ROM information is recorded as the RAM information in the predetermined address at n-time speed.

    摘要翻译： 光盘装置在与光信息存储介质的ROM信息相关联的位置处将与ROM信息有关的新信息记录在RAM中，同时连续重新生成光信息存储介质的ROM信息。 在作为参考的信息再现速度V的n（n> 2）倍处读取至少ROM信号，并存储在用于读取的缓冲存储器中，然后以信息再生速度的速度输出所存储的信息 当所存储的信息从缓冲存储器输出用于读取时，输入信息被存储在用于写入的缓冲存储器中，然后光头被访问被管理的地址位置，使得输出信息的时间关系 和用于记录的输入信息链接。

    A video data recording and reproducing apparatus with data modification detection
    17.
    发明公开
    A video data recording and reproducing apparatus with data modification detection 审中-公开
    用于记录和再现用的检测数据的变化视频数据的设备

    公开(公告)号：EP1821255A3

    公开(公告)日：2008-05-21

    申请号：EP07007389.5

    申请日：2000-05-25

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Aoki, Yoshito, c/o Matsushita El. Ind. Co., Ltd.

    IPC分类号： G06T1/00

    CPC分类号： G11B20/00086 ,  G06T1/0021 ,  G11B20/00007 ,  G11B20/0021 ,  G11B20/00492 ,  G11B20/00884 ,  G11B20/10 ,  G11B2020/1843

    摘要： First modification detection data is generated from the (compressed) video data. The video data is combined with the first modification detection data. The combined data is recorded on a recording medium. The read combined data is separated into the compressed video data and the first modification detection data. Second modification detection data is generated according to the separated compressed data. The separated first data modification detection data is compared with the second data modification detection data to detect data modification. Outputting expanded video data is controlled according to the comparing result. The recorded data may be copied on a removable disc. A data reproducing apparatus having the second modification detection data generation circuit and the comparing circuit reproduces the removable disc. The reproduced video data may be further processed by a watermark processing circuit to embed watermark data in the video data which are recorded on another removable disc. The compressed video data may be transmitted through a network with encrypting. Encrypting key data is exchanged between the data transmitting side and the receiving side for decrypting. Encrypted video data may be recorded or transmitted and the encrypting key is stored for decrypting or transmitted for decrypting.

    Optical disk device
    20.
    发明公开
    Optical disk device 审中-公开
    光盘设备

    公开(公告)号：EP1617432A1

    公开(公告)日：2006-01-18

    申请号：EP05254287.5

    申请日：2005-07-07

    申请人： TEAC CORPORATION

    发明人： Mashimo, Akira

    IPC分类号： G11B20/18 ,  G11B20/12 ,  G11B7/007 ,  G11B27/24

    CPC分类号： G11B27/24 ,  G11B20/1803 ,  G11B2020/1843 ,  G11B2220/2579

    摘要： An optical disk device which drives an HD-DVD or the like. When recording or reproducing data with respect to an optical disk of HD-DVD, the address information is demodulated by an address decoding circuit and is supplied to a system controller (S201). The system controller performs error checking using the CRC technique (S202). When a resulting CRC value does not correspond to CRC bits, the system controller regards a bit in which the number of waves in wobbles having the same phase is not four, which is a predetermined value, as an error bit (S103), and performs bit data replacement with respect to the error bit (S203). Specifically, the system controller searches for a combination of bit values by which a resulting CRC value matches the CRC bits, thereby performing error correction. At this time, the system controller tries the data value replacement preferentially using a combination of bit values by which the address is advanced by one address from the immediately previous address which is fixed among all the possible combinations with respect to the error bits.

    摘要翻译： 驱动HD-DVD等的光盘装置。 当对HD-DVD的光盘记录或再现数据时，地址信息由地址解码电路解调并提供给系统控制器（S201）。 系统控制器使用CRC技术执行错误检查（S202）。 当得到的CRC值不对应于CRC比特时，系统控制器将具有相同相位的摆动中的波的数目不是作为预定值的四个的比特视为错误比特（S103），并且执行 关于错误位的位数据替换（S203）。 具体地说，系统控制器搜索结果CRC值与CRC位匹配的位值的组合，从而执行纠错。 此时，系统控制器优先使用从相对于错误比特的所有可能组合中固定的紧邻先前地址中的一个地址提前地址的比特值的组合来尝试数据值替换。