Processing an MPEG elementary stream in a conditional access overlay environment
    1.
    发明授权
    Processing an MPEG elementary stream in a conditional access overlay environment 有权
    在条件访问覆盖环境中处理MPEG基本流

    公开(公告)号:US07555123B2

    公开(公告)日:2009-06-30

    申请号:US10908169

    申请日:2005-04-29

    IPC分类号: H04N7/167 H04L9/00

    CPC分类号: H04N21/43856 H04N21/23897

    摘要: Processing an MPEG elementary stream contained in multiple PID streams in a conditional access overlay environment. A multi-program transport stream contains numerous video and audio elementary streams. Critical packets in the elementary streams are encrypted with two different encryption schemes creating a stream having multiple PID values. The streams are then sent from the headend to individual set-top boxes. One encryption scheme can be decoded by the incumbent set-top box and the second encryption scheme can be decoded by the overlay set-top box. The overlay set-top box uses a dual filter system to filter and decode the PIDs for each video and audio stream of the desired program.

    摘要翻译: 在条件访问覆盖环境中处理包含在多个PID流中的MPEG基本流。 多程序传输流包含许多视频和音频基本流。 基本流中的关键数据包使用两种不同的加密方案进行加密,创建具有多个PID值的数据流。 然后将流从头端发送到各个机顶盒。 一个加密方案可以由现有机顶盒解码,第二加密方案可以由覆盖机顶盒解码。 覆盖机顶盒使用双重滤波器系统对所需节目的每个视频和音频流过滤和解码PID。

    Encrypting received content
    2.
    发明授权
    Encrypting received content 有权
    加密收到的内容

    公开(公告)号:US08312265B2

    公开(公告)日:2012-11-13

    申请号:US10015351

    申请日:2001-12-11

    IPC分类号: H04L9/00

    摘要: Encrypting content included in a program or service is disclosed, wherein the encrypted content is transmitted from a transmitter to a receiver in a subscriber network. Generally, in one embodiment, the encrypted program or service is packetized, and the packets are transmitted to the receiver. When a packet having ciphertext of the encrypted program or service is received at the receiver, the ciphertext of the packet is preferably converted to a different form of ciphertext.

    摘要翻译: 公开了包含在程序或服务中的加密内容,其中加密内容从用户网络中的发射机发送到接收机。 通常,在一个实施例中,加密的程序或服务被分组化,并且分组被发送到接收器。 当在接收机处接收到具有加密程序或服务的密文的分组时,分组的密文优选地被转换成不同形式的密文。

    Trick Mode Operations
    7.
    发明申请
    Trick Mode Operations 审中-公开
    技巧模式操作

    公开(公告)号:US20090196357A1

    公开(公告)日:2009-08-06

    申请号:US12389588

    申请日:2009-02-20

    IPC分类号: H04N7/12

    摘要: Systems and methods for trick mode operation in a digital home communication terminal (DHCT) are disclosed. One such method comprises receiving a plurality of parameters describing trick mode operations for a stored program. The method also comprises selecting multiple picture sets, from the stored program, based at least in part on the parameters. The method also comprises decoding the selected multiple picture sets for a duration specified in the plurality of parameters, to produce a plurality of decoded pictures. The method also comprises displaying the decoded pictures. The method also comprises selectively repeating the decode or the display of one of the pictures in the selected multiple picture sets, based on the parameters.

    摘要翻译: 公开了数字家庭通信终端(DHCT)中的特技模式操作的系统和方法。 一种这样的方法包括接收描述用于存储的节目的特技模式操作的多个参数。 该方法还包括至少部分地基于参数从存储的程序中选择多个图像组。 该方法还包括在多个参数中指定的持续时间内对所选择的多个图像组进行解码,以产生多个解码的图像。 该方法还包括显示解码的图像。 该方法还包括基于参数选择性地重复所选择的多个图像组中的一个图像的解码或显示。