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22 条记录 (耗时 0.01 秒)

    Method of accessing track in still state of recording medium and apparatus thereof
    2.
    发明公开
    Method of accessing track in still state of recording medium and apparatus thereof 失效
    在记录媒体的状态下访问跟踪的方法及其装置

    公开(公告)号：EP0279696A3

    公开(公告)日：1989-05-24

    申请号：EP88301442.5

    申请日：1988-02-19

    申请人： CANON KABUSHIKI KAISHA

    发明人： Sakagami, Wataru ,  Endo, Kiyonobu ,  Taniwa, Shigeyuki ,  Hosoya, Hideki

    IPC分类号： G11B21/08 ,  G11B7/08

    CPC分类号： G11B7/08505 ,  G11B15/1875 ,  G11B21/081

    摘要： A method of accessing recording and/or reproducing means to a desired track of an information recording medium having a plurality of parallel tracks, wherein said recording and/or reproducing means and the recording medium are not relatively moved in a longitudinal direction of the tracks while the recording and/or reproducing means is moved relative to recording medium in a direction so as to cross the tracks. An apparatus for recording and/or reproducing information, comprises:
        means for recording information in and/or reproducing the information from a recording having a plurality of parallel tracks;
        first driving means for moving the recording medium relative to said recording and/or reproducing means in a longitudinal direction of the tracks;
        second driving means for moving said recording and/or reproducing means relative to the recording medium in a direction so as to cross the tracks; and
        means for controlling to disable the first driving means when the second driving means is operated.

    Information record medium having a header having error correction code added for each block and a method for recording information on such a medium
    5.
    发明公开
    Information record medium having a header having error correction code added for each block and a method for recording information on such a medium 失效
    具有添加每个块的错误校正代码的头的信息记录介质和用于记录这些介质的信息的方法

    公开(公告)号：EP0258043A3

    公开(公告)日：1988-09-28

    申请号：EP87307528

    申请日：1987-08-25

    申请人： CANON KABUSHIKI KAISHA

    发明人： Sakagami, Wataru ,  Ogasawara, Yutaka

    IPC分类号： G11B20/18 ,  G11B20/12

    CPC分类号： G11B20/1833 ,  G11B20/1215

    摘要： The information record medium having information recorded in a plurality of blocks, wherein each of said blocks has a data field and a header field including information with regard to the block per se, the header field having an error correction code added thereto. The method for recording information comprising the steps of:
        dividing data into a plurality of blocks per a predetermined information unit;
        adding to each of the divided data blocks a header field including information concerning the block per se;
        converting the header fields to information with error correction codes;
        checking whether addition of an error correction code to the data block is required or not for each data block, and if required, converting the data to information with the error correction code; and
        writing the data having the header fields added thereto onto an information record medium for each block.

    Apparatus for recording and reproducing information
    6.
    发明公开
    Apparatus for recording and reproducing information 失效
    记录和复制信息的装置

    公开(公告)号：EP0251666A3

    公开(公告)日：1988-09-07

    申请号：EP87305599

    申请日：1987-06-23

    申请人： CANON KABUSHIKI KAISHA

    发明人： Sakagami, Wataru

    IPC分类号： G11B07/007 ,  G11B20/12

    CPC分类号： G11B27/327 ,  G06F3/08 ,  G11B7/0033 ,  G11B7/00736 ,  G11B19/02 ,  G11B20/1215

    摘要： An information recording apparatus comprises: a recorder to record information into a recording medium such as an optical card having a plurality of information recording tracks (106a, 106b); a generator to general manage­ment information, i.e., a directory to manage the information to be recorded into the card; and a controller for allowing a plurality of directories (321a to 321d) to be recorded into one of the information recording tracks, wherein when the controller additionally records a directory, it controls the recording position of the directory on the basis of the number concerned with the directories recorded in one track. The controller counts the number of directories or the number of gaps among the directories recorded in one track. When the count value is less than a predetermined number, the controller additionally records a new directory into the track. With this apparatus, the directories can be managed by a simple constitution without adding addresses to the recorded information, respectively.

    Method of recording indicia for indicating presence or absence of error in medium after error checking and apparatus therefor
    9.
    发明公开
    Method of recording indicia for indicating presence or absence of error in medium after error checking and apparatus therefor 失效
    记录错误检查中指示存在或不存在中性的指标的方法及其装置

    公开(公告)号：EP0261918A3

    公开(公告)日：1988-10-26

    申请号：EP87308348

    申请日：1987-09-21

    申请人： CANON KABUSHIKI KAISHA

    发明人： Sakagami, Wataru ,  Iijima, Katsumi

    IPC分类号： G11B20/18 ,  G11B07/013

    CPC分类号： G11B20/1883 ,  G11B7/0033 ,  G11B7/004

    摘要： There is disclosed an information record method comprising the steps of recording information in one record area of an information record medium having a plurality of record areas, reproducing the recorded information and checking error thereof, and recording an indicia indicating presence or absence of error at a portion of the record area in accordance with an error check result. An information record apparatus used for the above method comprises a device for recording information on an information record medium having a plurality of record areas, a device for moving the record device to a record area to which information is to be recorded, a device for reproducing the information recorded in the record area, a device for checking error based on the reproduced information, and a device for recording an indicia for indicating presence or absence of error at a portion of the record area in accordance with error check result.