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    Method and apparatus for information embedding in image data
    2.
    发明公开
    Method and apparatus for information embedding in image data 审中-公开
    Bilddaten的Verfahren und Vorrichtung zur Informationseinbettung

    公开(公告)号：EP1006730A2

    公开(公告)日：2000-06-07

    申请号：EP99123774.4

    申请日：1999-11-30

    申请人： Hitachi, Ltd. ,  SONY CORPORATION ,  Pioneer Electric Corporation

    发明人： Yoshiura, Hiroshi ,  Echizen, Isao ,  Arai, Takao ,  Kimura, Hiroyuki ,  Takeuchi, Toshifumi ,  Moriyama, Yoshiaki, c/o Sogo Kenkyusho ,  Sugaya, Kazumi, c/o Sogo Kenkyusho ,  Ogino, Akira

    IPC分类号： H04N7/26

    CPC分类号： G06T1/0085 ,  G06T1/0028 ,  G06T2201/0065 ,  H04N19/467 ,  H04N19/51 ,  H04N19/61 ,  H04N21/23892 ,  H04N21/8358

    摘要： A watermark information embedding method, and apparatus, capable of suppressing the quality degradation of contents and increasing the survivability of embedded information. When embedding watermark information in moving picture data formed of a plurality of still picture frames arranged in time series, a motion vector representing a property specific to moving picture is detected (22, 224) for each of image blocks generated by dividing a target frame. According to a motion quantity, a pixel change factor specifying rule (32, 320) is selected (23) for each block. Out of pixels permitted to be changed in luminance depending upon the state of an image in each block representing a property specific to still picture, as many pixels as a number specified by the selected rule (33) are selected (24). Luminance change processing for forming watermark information is conducted (25) on the selected pixels.

    摘要翻译： 一种水印信息嵌入方法和装置，其能够抑制内容的质量劣化并增加嵌入信息的生存性。 当将水印信息嵌入由以时间序列排列的多个静止图像帧形成的运动图像数据中时，针对通过划分目标帧而生成的每个图像块检测表示运动图像特有的属性的运动矢量（22,224）。 根据运动量，为每个块选择（23）像素变化因子指定规则（32,320）。 根据表示静止图像特有的属性的每个块中的图像的状态，亮度的允许变化的像素的数量可以被选择（24）。 对所选择的像素进行用于形成水印信息的亮度变化处理（25）。

    Network system enabling transmission control
    3.
    发明公开
    Network system enabling transmission control 审中-公开
    Netzwerksystem mitÜbertragungskontrolle

    公开(公告)号：EP1318645A3

    公开(公告)日：2005-04-20

    申请号：EP02003597.8

    申请日：2002-02-15

    申请人： Hitachi, Ltd.

    发明人： Ito, Shinji ,  Miyazaki, Kunihiko ,  Echizen, Isao

    IPC分类号： H04L29/06 ,  H04L12/58 ,  G06F1/00

    CPC分类号： H04L51/14 ,  H04L12/2803 ,  H04L63/04 ,  H04L63/105

    摘要： A network system capable of preventing the leakage of a confidential file (107) by an inadvertent act of a transmitting party and capable of meeting the requirement for an arbitrary file format is disclosed. A label indicating a security level (202; 1402) ("confidential" or "unclassified") is attached to the file (107) in a client terminal (101), which transmits the labeled file (107) outside. A transmission management program (119) on a gateway server (118) checks the label of the file (107), and in the case where the security level (202; 1402) is "unclassified", transmits the file (107) to an external network (121). Also, a label management program (109) manages the labeled file (107) in the client terminal (101).

    摘要翻译： 公开了一种能够通过发送方的无意的动作来防止机密文件（107）泄漏并且能够满足任意文件格式的要求的网络系统。 指示安全级别（202; 1402）（“机密”或“未分类”）的标签被附加到在外部发送标记文件（107）的客户终端（101）中的文件（107）。 网关服务器（118）上的传输管理程序（119）检查文件（107）的标签，并且在安全级别（202; 1402）为“未分类”的情况下，将文件（107）发送到 外部网络（121）。 此外，标签管理程序（109）管理客户终端（101）中的标记文件（107）。

    Watermark embedding method and system
    6.
    发明公开
    Watermark embedding method and system 有权
    水印嵌入方法和系统

    公开(公告)号：EP0901102A2

    公开(公告)日：1999-03-10

    申请号：EP98116571.5

    申请日：1998-09-02

    申请人： Hitachi, Ltd.

    发明人： Echizen, Isao ,  Yoshiura, Hiroshi ,  Nakamura, Masafumi ,  Arai, Takao ,  Takeuchi, Toshifumi

    IPC分类号： G06T1/00

    CPC分类号： G06T1/0021 ,  G06T2201/0051 ,  G06T2201/0061 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32251 ,  H04N2201/3233 ,  H04N2201/327

    摘要： A data embedding method and apparatus and a data reproducing method and apparatus are provided which can apply a digital watermark to various contents. Instead of embedding watermarking information in respective pixels or by using a relation between pixels, the watermarking information is embedded as a position pattern (4) of changed pixels (3) in the contents. Reliability comparable with conventional techniques can be obtained irrespective of a change in a smaller number of pixels for the contents.

    摘要翻译： 提供了一种可以将数字水印应用于各种内容的数据嵌入方法和装置以及数据再现方法和装置。 代替在各个像素中嵌入水印信息或者通过使用像素之间的关系，嵌入水印信息作为内容中变化像素（3）的位置模式（4）。 无论内容的像素数量变化如何，都可以获得与传统技术相当的可靠性。

    Network system enabling transmission control
    7.
    发明公开
    Network system enabling transmission control 审中-公开
    与传输控制网络系统

    公开(公告)号：EP1318645A2

    公开(公告)日：2003-06-11

    申请号：EP02003597.8

    申请日：2002-02-15

    申请人： Hitachi, Ltd.

    发明人： Ito, Shinji ,  Miyazaki, Kunihiko ,  Echizen, Isao

    IPC分类号： H04L29/06 ,  H04L12/58

    CPC分类号： H04L51/14 ,  H04L12/2803 ,  H04L63/04 ,  H04L63/105

    摘要： A network system capable of preventing the leakage of a confidential file (107) by an inadvertent act of a transmitting party and capable of meeting the requirement for an arbitrary file format is disclosed. A label indicating a security level (202; 1402) ("confidential" or "unclassified") is attached to the file (107) in a client terminal (101), which transmits the labeled file (107) outside. A transmission management program (119) on a gateway server (118) checks the label of the file (107), and in the case where the security level (202; 1402) is "unclassified", transmits the file (107) to an external network (121). Also, a label management program (109) manages the labeled file (107) in the client terminal (101).