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    A video data recording and reproducing apparatus with data modification detection
    3.
    发明公开
    A video data recording and reproducing apparatus with data modification detection 审中-公开
    用于记录和再现用的检测数据的变化视频数据的设备

    公开(公告)号：EP1821255A2

    公开(公告)日：2007-08-22

    申请号：EP07007389.5

    申请日：2000-05-25

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Aoki, Yoshita

    IPC分类号： G06T1/00

    CPC分类号： G11B20/00086 ,  G06T1/0021 ,  G11B20/00007 ,  G11B20/0021 ,  G11B20/00492 ,  G11B20/00884 ,  G11B20/10 ,  G11B2020/1843

    摘要： First modification detection data is generated from the (compressed) video data. The video data is combined with the first modification detection data. The combined data is recorded on a recording medium. The read combined data is separated into the compressed video data and the first modification detection data. Second modification detection data is generated according to the separated compressed data. The separated first data modification detection data is compared with the second data modification detection data to detect data modification. Outputting expanded video data is controlled according to the comparing result. The recorded data may be copied on a removable disc. A data reproducing apparatus having the second modification detection data generation circuit and the comparing circuit reproduces the removable disc. The reproduced video data may be further processed by a watermark processing circuit to embed watermark data in the video data which are recorded on another removable disc. The compressed video data may be transmitted through a network with encrypting. Encrypting key data is exchanged between the data transmitting side and the receiving side for decrypting. Encrypted video data may be recorded or transmitted and the encrypting key is stored for decrypting or transmitted for decrypting.

    摘要翻译： 第一修改检测数据从（压缩）视频数据生成的。 的视频数据与所述第一变形例的检测数据相结合。 将合并的数据被记录在记录介质上。 将合并的读出的数据分离为压缩视频数据和所述第一修改检测数据。 第二变形例的检测数据生成gemäß到分离压缩的数据。 分离出的第一数据的修改检测数据与第二数据修改检测数据相比较，以检测数据修改。 输出扩展的视频数据被控制雅鼎的比较结果。 所记录的数据可以可移动的光盘上被复制。 具有第二修改检测数据生成电路和比较电路的数据再现装置再现所述可移除盘。 重放的视频数据可以由一个水印进一步的处理电路进行处理，以水印数据嵌入到其上记录有另一个可移动光盘上的视频数据。 压缩的视频数据可能是通过与加密网络反式mitted。 加密密钥数据，在数据发送侧和用于解密所述接收侧之间交换。 加密的视频数据可以被记录或反式mitted和加密密钥被存储用于解密或反式mitted用于解密。

    Video recording and reproducing apparatus and method with data modification detection
    7.
    发明公开
    Video recording and reproducing apparatus and method with data modification detection 审中-公开
    Videoaufzeichnungs- undVideowiedergabegerätmitDatenänderungserkennungund entsprechendes Verfahren

    公开(公告)号：EP1056043A2

    公开(公告)日：2000-11-29

    申请号：EP00304453.4

    申请日：2000-05-25

    申请人： Matsushita Electric Industrial Co., Ltd.

    发明人： Aoki, Yoshito

    IPC分类号： G06T1/00

    CPC分类号： G11B20/00086 ,  G06T1/0021 ,  G11B20/00007 ,  G11B20/0021 ,  G11B20/00492 ,  G11B20/00884 ,  G11B20/10 ,  G11B2020/1843

    摘要： First modification detection data is generated from the (compressed) video data. The video data is combined with the first modification detection data. The combined data is recorded on a recording medium. The read combined data is separated into the compressed video data and the first modification detection data. Second modification detection data is generated according to the separated compressed data. The separated first data modification detection data is compared with the second data modification detection data to detect data modification. Outputting expanded video data is controlled according to the comparing result. The recorded data may be copied on a removable disc. A data reproducing apparatus having the second modification detection data generation circuit and the comparing circuit reproduces the removable disc. The reproduced video data may be further processed by a watermark processing circuit to embed watermark data in the video data which are recorded on another removable disc. The compressed video data may be transmitted through a network with encrypting. Encrypting key data is exchanged between the data transmitting side and the receiving side for decrypting. Encrypted video data may be recorded or transmitted and the encrypting key is stored for decrypting or transmitted for decrypting.

    摘要翻译： 从（压缩）视频数据生成第一修改检测数据。 视频数据与第一修改检测数据组合。 组合的数据被记录在记录介质上。 读取的组合数据被分离成压缩视频数据和第一修改检测数据。 根据分离的压缩数据生成第二修改检测数据。 将分离的第一数据修改检测数据与第二数据修改检测数据进行比较以检测数据修改。 根据比较结果控制扩展视频数据的输出。 记录的数据可以复制在可移动盘上。 具有第二修改检测数据生成电路和比较电路的数据再现装置再现可移除盘。 再现的视频数据可以由水印处理电路进一步处理，以将水印数据嵌入到记录在另一移动盘上的视频数据中。 压缩视频数据可以通过加密的网络传输。 在数据发送侧和接收侧之间交换加密密钥数据以进行解密。 可以记录或发送加密的视频数据，并且存储加密密钥以进行解密或发送用于解密。