Data reproduction apparatus capable of safely controlling reproduction time of encrypted content data and data reproduction circuit and data recording apparatus used for the same
    4.
    发明授权
    Data reproduction apparatus capable of safely controlling reproduction time of encrypted content data and data reproduction circuit and data recording apparatus used for the same 有权
    能够安全地控制加密的内容数据的再现时间的数据再现装置和用于其的数据再现电路和数据记录装置

    公开(公告)号:US07428307B2

    公开(公告)日:2008-09-23

    申请号:US10482681

    申请日:2002-06-26

    IPC分类号: H04L9/00

    摘要: A decryption processing unit decrypts encrypted content data using a license key Kc. When an elapsed time after reception of the license key (Kc) does not exceed a hold time at a time of the license key (Kc) included in reproduction control information (ACp), reproduction of encrypted content data continues. When the elapsed time exceeds the hold time at a time, the license key (Kc) is discarded, and a reproduction control unit again obtains a license key (Kc) from a memory card. Discarding and reobtaining license key (Kc) continues until an allowable output count of license key (Kc) from the memory card becomes zero. As a result, a reproduction time of encrypted content data can be controlled safely.

    摘要翻译: 解密处理单元使用许可证密钥Kc对加密的内容数据进行解密。 当接收到许可证密钥(Kc)之后的经过时间不超过包含在再现控制信息(ACp)中的许可证密钥(Kc)时的保持时间时,继续加密内容数据的再现。 当经过时间超过一次的保持时间时,许可证密钥(Kc)被丢弃,并且再现控制单元再次从存储卡获得许可证密钥(Kc)。 丢弃并重新获得许可证密钥(Kc),直到来自存储卡的许可证密钥(Kc)的允许输出计数变为零。 结果,可以安全地控制加密的内容数据的再现时间。

    Information recording device, information reproduction device, information recording method, information reproduction method, information recording program, information reproduction program, and information recording medium
    9.
    发明申请
    Information recording device, information reproduction device, information recording method, information reproduction method, information recording program, information reproduction program, and information recording medium 有权
    信息记录装置,信息再现装置,信息记录方法,信息再现方法,信息记录程序,信息再现程序和信息记录介质

    公开(公告)号:US20050111278A1

    公开(公告)日:2005-05-26

    申请号:US10506527

    申请日:2003-03-04

    摘要: An information recording apparatus is provided whereby in the reproduction of broadcasting information, the broadcasting information can be recorded so that the combination and so on of contents included in the broadcasting information can be recognized without the need for reproducing the broadcasting information itself. An information recording apparatus for recording broadcasting information constituted of a packet which has a predetermined amount of information and includes different types of contents, each type including one or more contents, the apparatus including a controller 8. The controller 8 generates contents group information based on correlation information which is included in the received broadcasting information and indicates a correlation between the contents, the contents group information including identification information for identifying the relationship between the packet and the content and type information indicating the type of the content, the contents group information indicating a contents group to include the one or more contents, and the controller 8 records the generated contents group information on a hard disk 1 with the broadcasting information.

    摘要翻译: 提供了一种信息记录装置,其中在广播信息的再现中,可以记录广播信息,使得能够识别广播信息中包含的内容的组合等,而不需要再现广播信息本身。 一种信息记录装置,用于记录由具有预定量的信息并且包括不同类型的内容的分组构成的广播信息,每种类型包括一个或多个内容,所述装置包括控制器8。 控制器8基于所接收的广播信息中包含的相关信息生成内容组信息,并且指示内容之间的相关性,包括用于识别分组与内容之间的关系的识别信息的内容组信息和指示类型的类型信息 的内容组信息,指示包含一个或多个内容的内容组的内容组信息,并且控制器8将生成的内容组信息记录在具有广播信息的硬盘1上。