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    DATA RECORDING MEDIUM, DATA RECORDING METHOD, AND DEVICE
    22.
    发明公开
    DATA RECORDING MEDIUM, DATA RECORDING METHOD, AND DEVICE 审中-公开
    数据记录介质，数据记录方法和装置

    公开(公告)号：EP1505576A1

    公开(公告)日：2005-02-09

    申请号：EP03746434.4

    申请日：2003-04-08

    申请人： Sony Disc Technology Inc.

    发明人： SAITO, Akiya, C/O SONY DISC TECHNOLOGY INC.

    IPC分类号： G11B7/0045 ,  G11B20/10 ,  G11B20/12

    CPC分类号： G11B20/0092 ,  G11B20/00086 ,  G11B20/00115 ,  G11B20/00202 ,  G11B20/00594 ,  G11B20/1426 ,  G11B2020/10898 ,  G11B2020/1461 ,  G11B2020/184

    摘要： With data of four symbols (Fig. 11A), a parity of two symbols (Fig. 11B) is created. These six symbols are EFM-modulated. Each symbol of eight bits is converted into a pattern of 14 bits (Fig. 11C). In a pit/land sequence formed on a disc (Fig. 11D), two symbols are rewritten. One symbol is (0x40). When an additional recording process is performed for the bit/land sequence, the pit length becomes long (Fig. 11E). The reproduced 14-bit data is converted into eight bits on the reproducing side. Thus, the original data (0x40) is rewritten to (0x22). A parity is also changed so that the additionally recorded data symbol (0x22) is not detected as an error.

    摘要翻译： 利用四个符号的数据（图11A），创建两个符号的奇偶校验（图11B）。 这六个符号是EFM调制的。 8位的每个符号被转换成14位的模式（图11C）。 在盘上形成的凹坑/平台序列中（图11D），两个符号被重写。 一个符号是（0x40）。 当对位/平台序列执行附加记录过程时，凹坑长度变长（图11E）。 再现的14位数据在再现侧被转换为8位。 因此，原始数据（0x40）被重写为（0x22）。 奇偶校验也会发生改变，从而附加记录的数据符号（0x22）不会被检测为错误。

    ERROR DETECTION APPARATUS AND ERROR DETECTION METHOD
    26.
    发明公开
    ERROR DETECTION APPARATUS AND ERROR DETECTION METHOD 审中-公开
    误差检测系统和错误检测方法

    公开(公告)号：EP1662668A4

    公开(公告)日：2008-02-27

    申请号：EP04772202

    申请日：2004-08-19

    申请人： MATSUSHITA ELECTRIC IND CO LTD

    发明人： MATSUDA SYUJI ,  YABUNO HIROYUKI

    IPC分类号： H03M13/15 ,  G11B20/18 ,  H03M13/09 ,  H03M13/29

    CPC分类号： G11B20/1833 ,  G11B20/1803 ,  G11B2020/184 ,  G11B2220/2562 ,  H03M13/03 ,  H03M13/29 ,  H03M13/2909 ,  H03M13/2915

    摘要： As shown in Fig. 1, an error detection method performs syndrome calculation for object code strings which are inputted in a discontinuous arrangement and makes the object code strings inputted in a discontinuous arrangement skip data so that arrangement of the code strings has continuity, thereby correcting the continuity between data and performing a first error detection code calculation. According to the syndrome obtained in the syndrome calculation, the error data position and the error data value of the object code string are calculated. According to the error data position and the error data value, a second error detection code calculation is performed again only for the error data position among the object code strings. By using the calculation result, the calculation result of the first error detection code calculation is updated so that the ECC processing and the EDC calculation processing which have been inputted in a discontinuous way are simultaneously performed.