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128 条记录 (耗时 0.018 秒)

    Method and apparatus for information embedding in image data
    1.
    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）。

    Data transmission method for embedded data, data transmitting and reproducing apparatures and information recording medium therefor
    8.
    发明公开
    Data transmission method for embedded data, data transmitting and reproducing apparatures and information recording medium therefor 有权
    为嵌入数据的数据传输方法，用于发送和再现的数据记录介质，该

    公开(公告)号：EP0901276A2

    公开(公告)日：1999-03-10

    申请号：EP98306973.3

    申请日：1998-09-01

    申请人： HITACHI, LTD.

    发明人： Kawamae, Osamu ,  Takeuchi, Toshifumi ,  Yoshiura, Hiroshi ,  Arai, Takao

    IPC分类号： H04N1/32

    CPC分类号： H04N1/32149 ,  G06T1/0071 ,  H03M13/13 ,  H03M13/6306 ,  H04L1/0045 ,  H04L1/08 ,  H04N1/32288 ,  H04N19/467 ,  H04N2201/3284

    摘要： In a data transmission method for information data containing additional information data therewith, comprising, at a transmitter side, following steps:

    adding error correction codes for correcting error to said additional information data;
    embedding said additional information data added with said error correction codes into the information data by plural times, repetitively; and
    transmitting the information data embedded with the repetitive additional information data therein, and comprising, at a receiver side, following steps:
    receiving the transmitted information data embedded with the repetitive additional information data therein;
    detecting the repetitive additional information data embedded from said transmitted information data received;
    determining said additional information data on a basis of a majority rule when receiving said information data; and
    correcting error with using the error correction codes received and determined when said additional information data contains error(s) therein.

    摘要翻译： 在用于包含附加信息数据用有，包括，在发射机侧的信息数据的数据传输方法，步骤如下：将纠错码用于校正错误的所述附加信息数据; 所述嵌入了所述纠错码插入通过多次，重复的信息数据增加附加信息数据; 和发射嵌有附加信息的重复数据。其中，该信息数据包括，在接收机侧，下列步骤：接收嵌入有在其中的附加信息重复的数据的反式mitted信息数据; 检测从所述接收的反式mitted信息数据的重复附加嵌入式信息数据; 确定性采矿多数所述规则的基础上的附加信息数据。当接收所述信息数据; 以及使用接收到的和确定性开采的纠错码，当所述附加信息数据的纠错包含错误（多个）在其中。

    PCM signal recording method and apparatus
    9.
    发明公开
    PCM signal recording method and apparatus 失效
    PCM信号记录方法和装置

    公开(公告)号：EP0501430A3

    公开(公告)日：1995-03-22

    申请号：EP92103200.9

    申请日：1992-02-25

    申请人： HITACHI, LTD.

    发明人： Nagai, Yutaka ,  Takeuchi, Toshifumi ,  Arai, Takao ,  Okamoto, Hiroo ,  Noguchi, Takaharu ,  Itoh, Shigeyuki

    IPC分类号： G11B27/30 ,  G11B20/10 ,  G11B20/12

    CPC分类号： G11B27/3027 ,  G11B20/10527 ,  G11B20/1208 ,  G11B2020/1087 ,  G11B2220/90

    摘要： A recording method is provided for a video tape recording apparatus having modes for recording PCM audio signals in a plurality of transmission rates. Index codes (104) for a video signal, which enable a search reproduction and so on, are recorded on a video tape in a constant transmission rate irrespective of the transmission rate of a PCM audio signal to be recorded. Further, an amble pattern (501) at the same frequency as the transmission rate of the PCM audio signal is recorded immediately behind the PCM signal recording area (102). A reproducing apparatus may be provided only with an index detecting circuit (603) corresponding to the constant transmission rate.

    摘要翻译： 为具有用于以多种传输速率记录PCM音频信号的模式的录像带记录装置提供了一种记录方法。 无论要记录的PCM音频信号的传输速率如何，用于视频信号的索引代码（104）都能以恒定的传输速率记录在录像带上，这使得能够进行搜索重放等。 此外，与PCM音频信号的传输速率相同的频率上的缓存模式（501）被记录在PCM信号记录区（102）的正后方。 再现设备可以仅设置有对应于恒定传输速率的索引检测电路（603）。