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    EMBEDDING AUXILIARY DATA IN AN INFORMATION SIGNAL
    71.
    发明公开
    EMBEDDING AUXILIARY DATA IN AN INFORMATION SIGNAL 审中-公开
    附加数据在信息信号积分

    公开(公告)号：EP1395986A1

    公开(公告)日：2004-03-10

    申请号：EP02769538.6

    申请日：2002-05-15

    Applicant: Koninklijke Philips Electronics N.V.

    Inventor： VAN DIJK, Marten, E. ,  WILLEMS, Franciscus, M., J.

    IPC: G11B20/00

    CPC classification number: G11B20/00891 ,  G11B20/00 ,  G11B20/00086 ,  G11B20/18

    Abstract: Information signals such as grayscale images or audio signals are represented as a sequence of PCM signal samples. To embed auxiliary data in the least significant bits of the signal, the samples are slightly distorted. There is a so-termed 'rate-distortion function' (20) which gives the largest embedding rate R given a certain distortion level D. It appears that the efficiency of prior art embedding schemes such as LSB replacement (21,22) can be improved. The invention discloses such embedding schemes (23,24). According to the invention, the signal is divided into groups of L (L>1) signal samples (x). For each group of signal samples, a vector of least significant portions (x mod n) of the signal samples is created. For n=2, the vector comprises the least significant bit of each signal sample. The syndrome of said vector (as defined in the field of error detection and correction) represents the embedded data. Only one (or a few, in any case less than L) signal sample(s) of a group needs to be modified so as to achieve that the vector assumes a desired syndrome value.

    A method of recording realtime data and a realtime data recording apparatus
    72.
    发明公开
    A method of recording realtime data and a realtime data recording apparatus 审中-公开
    用于记录实时数据的方法和装置

    公开(公告)号：EP1367583A8

    公开(公告)日：2004-03-10

    申请号：EP03020256.8

    申请日：1999-12-14

    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    Inventor： Nakashima, Yoshihide

    IPC: G11B20/18

    CPC classification number: G11B20/1883 ,  G11B19/04 ,  G11B20/18 ,  G11B2020/10537 ,  G11B2020/10944 ,  G11B2020/1896 ,  G11B2220/20

    Abstract: Realtime data is recorded on a disc at a unit of cluster including successive sectors. When an error occurs in recording, the realtime data to be recorded in one cluster is relocated at another cluster, wherein successive sectors in each cluster are physically nearly arranged, so that movement of head is reduced when an error occurs and realtime data is recorded without losing the realtime data and without waiting. The area recording medium may be scanned to detect an error in recording during an idle interval. The idle interval is detected in accordance with the request interval of storing or reproducing and writing and reading execution time. A bit map table for storing used status and defect status may be recorded on the area recording medium. Logical sector address in a sector may be converted into a physical sector address such that sectors indicated by the physical sector address converted from the logical sector address in a cluster are physically nearly located on the area recording medium.

    Storage medium initialization and cancelation method
    75.
    发明公开
    Storage medium initialization and cancelation method 审中-公开
    Initialisierungs- undLöschungsverfahrenfürAufzeichnungsmedium

    公开(公告)号：EP1351247A2

    公开(公告)日：2003-10-08

    申请号：EP03006832.4

    申请日：2003-03-27

    Applicant: SONY CORPORATION

    Inventor： Ohbi, Seiji ,  Kawakami, Takashi ,  Kii, Manabu ,  Hattori, Masato

    IPC: G11B27/32 ,  G11B20/12 ,  G11B23/36 ,  G11B20/10 ,  G11B20/18

    CPC classification number: G11B20/1883 ,  G11B11/10523 ,  G11B11/10584 ,  G11B11/10595 ,  G11B20/00086 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B23/36 ,  G11B27/034 ,  G11B27/105 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B27/32 ,  G11B27/329 ,  G11B27/34 ,  G11B27/36 ,  G11B2220/20 ,  G11B2220/2529

    Abstract: A storage medium initializing method includes steps of recording on a storage medium a management table configured to manage a replacement area for a defect area in a data area in the storage medium; recording a unique identification on the storage medium; and recording management data in the data area. The step of recording a unique identification includes recording the unique identification on the storage medium, but outside an area managed by the management data. The method optional includes initialization and cancellation steps.

    Abstract translation: 存储介质初始化方法包括在存储介质上记录被配置为管理存储介质中的数据区域中的缺陷区域的替换区域的管理表的步骤; 在存储介质上记录唯一的标识; 并在数据区中记录管理数据。 记录唯一标识的步骤包括将唯一标识记录在存储介质上，但在由管理数据管理的区域之外。 该方法可选包括初始化和取消步骤。 存储介质初始化方法包括在存储介质上记录被配置为管理存储介质中的数据区域中的缺陷区域的替换区域的管理表的步骤; 在存储介质上记录唯一的标识; 并在数据区中记录管理数据。 记录唯一标识的步骤包括将唯一标识记录在存储介质上，但在由管理数据管理的区域之外。 该方法可选包括初始化和取消步骤。

    Information recording medium, recording and reproduction apparatus and method
    77.
    发明公开
    Information recording medium, recording and reproduction apparatus and method 有权
    Informationsaufzeichnungsmedium，Gerätund Verfahren zur Aufzeichnung und Wiedergabe

    公开(公告)号：EP1347452A2

    公开(公告)日：2003-09-24

    申请号：EP03005475.3

    申请日：2003-03-17

    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    Inventor： Takahashi, Yoshihisa ,  Ito, Motoshi ,  Ueda, Hiroshi

    IPC: G11B20/18 ,  G11B7/007

    CPC classification number: G11B20/1883 ,  G11B20/18 ,  G11B20/1833 ,  G11B2020/1826 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/2562

    Abstract: An information recording medium includes a data area for recording user data, and a defect management area for recording a defect list for managing N number of defect areas existing in the data area, where N is an integer satisfying N ≥ 0. The defect list includes a header located at a fixed position in the defect list, N number of defect entries respectively including position information on positions of the N number of defect areas, and an anchor. The header, the N number of defect entries, and the anchor are located in this order. The header includes a defect list identifier for identifying the defect list, first update times information, and a defect entry number representing the number of the defect entries. The anchor includes an anchor identifier for identifying the anchor, and second update times information.

    Abstract translation: 信息记录介质包括用于记录用户数据的数据区域和用于记录用于管理数据区域中存在的N个缺陷区域的缺陷列表的缺陷管理区域，其中N是满足N≥0的整数。缺陷列表包括 位于缺陷列表中的固定位置的标题，N个缺陷条目，分别包括关于N个缺陷区域的位置的位置信息和锚点。 标题，N个缺陷条目和锚点按照这个顺序进行。 标题包括用于识别缺陷列表的缺陷列表标识符，第一更新时间信息和表示缺陷条目数量的缺陷条目号。 锚包括用于识别锚的锚定标识符和第二更新次数信息。

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