Descrambling of multiple television channels
    12.
    发明授权
    Descrambling of multiple television channels 有权
    解扰多个电视频道

    公开(公告)号:US08959544B2

    公开(公告)日:2015-02-17

    申请号:US13757168

    申请日:2013-02-01

    Abstract: Various arrangements for descrambling multiple television channels concurrently are presented. A set-top box may receive a first plurality of television channels as scrambled data packets. A previously-received locally-stored networking information table may be accessed that associates each of the multiple television channels with the same entitlement control message, as indicated by a packet identifier. An entitlement control message having the same packet identifier may be received. A smartcard may be used to decrypt the entitlement control message having the same packet identifier to obtain a first control word and a second control word. Scrambled data packets corresponding to the multiple television channels may be descrambled using the first control word and the second control word. These television channels may be stored and/or output for presentation by the set-top box.

    Abstract translation: 提出了同时解扰多个电视频道的各种布置。 机顶盒可以接收第一多个电视频道作为加扰的数据分组。 可以访问先前接收的本地存储的网络信息表,其将多个电视频道中的每一个与由分组标识符指示的相同的授权控制消息相关联。 可以接收具有相同分组标识符的授权控制消息。 可以使用智能卡来解密具有相同分组标识符的授权控制消息,以获得第一控制字和第二控制字。 可以使用第一控制字和第二控制字对与多个电视频道对应的加扰的数据包进行解扰。 这些电视频道可以被存储和/或输出以由机顶盒呈现。

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