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    VIDEOPHONE OVER CABLE NETWORKS
    1.
    发明申请
    VIDEOPHONE OVER CABLE NETWORKS 有权

    公开(公告)号：US20070126856A1

    公开(公告)日：2007-06-07

    申请号：US11567890

    申请日：2006-12-07

    申请人： Arturo Rodriguez ,  Timothy Simerly ,  Luis Rovira ,  William Wall ,  Neilesh Patel

    发明人： Arturo Rodriguez ,  Timothy Simerly ,  Luis Rovira ,  William Wall ,  Neilesh Patel

    IPC分类号： H04N7/14

    CPC分类号： H04N7/148 ,  H04N7/147 ,  H04N7/15 ,  H04N21/236 ,  H04N21/4223 ,  H04N21/42676 ,  H04N21/4316 ,  H04N21/4788 ,  H04N21/6118 ,  H04N21/64322

    摘要： The present invention is directed to a videophone system implemented over a cable television network. The instant invention provides a videophone comprising a camera for capturing images associated with a videophone signal, a videophone unit and a set top terminal or cable modem connecting the videophone to a cable television network. Videophone signals created at the call origination site are encoded and transported to a predetermined destination over an existing cable television network. The system uses IP addresses as phone number on the network. Additionally, transport of videophone signals between different cable systems is accomplished via a high-speed long distance data network, such as, for example, a satellite network, that provides communication between the headends of the different cable television systems. The set top terminal may be a conventional subscriber terminal, a cable modem or a subscriber terminal configured to operate as a cable modem. The set top terminal provides the interface between the videophone and the cable television system. More than one videophone may be connected to a single set top terminal. Display of videophone data may be achieved using any conventional display device, including a television set or a personal computer monitor. Accordingly, the videophone system described herein takes advantage of increased bandwidth and lower cost realized by using existing cable television infrastructure and technology.

    摘要翻译： 本发明涉及一种通过有线电视网络实现的可视电话系统。 本发明提供了一种可视电话，其包括用于捕获与可视电话信号相关联的图像的相机，可视电话单元以及将可视电话连接到有线电视网络的机顶终端或电缆调制解调器。 在呼叫发起站点创建的视频电话信号被编码并通过现有的有线电视网络传输到预定的目的地。 系统使用IP地址作为网络上的电话号码。 另外，在不同的有线电视系统之间传输视频电话信号是通过提供不同有线电视系统的头端之间的通信的高速长距离数据网络，例如卫星网络实现的。 机顶终端可以是被配置为作为电缆调制解调器操作的常规用户终端，电缆调制解调器或用户终端。 机顶终端提供可视电话和有线电视系统之间的接口。 多个可视电话可以连接到单个机顶终端。 可以使用包括电视机或个人计算机监视器的任何常规显示设备来实现可视电话数据的显示。 因此，本文描述的可视电话系统利用通过使用现有的有线电视基础设施和技术实现的增加的带宽和更低的成本。

    ATOMIC CHANNEL CHANGES IN A SWITCHED DIGITAL VIDEO SYSTEM
    3.
    发明申请
    ATOMIC CHANNEL CHANGES IN A SWITCHED DIGITAL VIDEO SYSTEM 审中-公开
    开关数字视频系统中的原子通道更改

    公开(公告)号：US20070107024A1

    公开(公告)日：2007-05-10

    申请号：US11164115

    申请日：2005-11-10

    申请人： William Versteeg ,  William Wall ,  Luis Rovira ,  Ken Morse

    发明人： William Versteeg ,  William Wall ,  Luis Rovira ,  Ken Morse

    IPC分类号： H04N7/173

    CPC分类号： H04N7/17309 ,  H04L12/185 ,  H04N21/43615 ,  H04N21/4383 ,  H04N21/472 ,  H04N21/6405 ,  H04N21/64738 ,  H04N21/64746

    摘要： Atomic channel change in a switched digital video (SDV) system. A set-top box (STB) sends join and leave message commands to a SDV device when requesting a channel change. If one of the IGMP message commands does not reach the SDV device, oversubscription can occur. A combined join and leave message ensures that a join command is performed only when a leave command is also performed. If the single message does not reach the SDV device, the STB resends the command.

    摘要翻译： 交换数字视频（SDV）系统中的原子信道变化。 当请求频道更改时，机顶盒（STB）向SDV设备发送加入和离开消息命令。 如果其中一条IGMP消息命令未到达SDV设备，则可能会出现超额认购。 组合的加入和离开消息确保只有在执行leave命令时才执行join命令。 如果单个消息没有到达SDV设备，则STB重新发送该命令。

    PARTIAL PRE-ENCRYPTION WITH NETWORK-BASED PACKET SORTING
    5.
    发明申请
    PARTIAL PRE-ENCRYPTION WITH NETWORK-BASED PACKET SORTING 审中-公开
    部分预加密与基于网络的分组分配

    公开(公告)号：US20070006253A1

    公开(公告)日：2007-01-04

    申请号：US11160572

    申请日：2005-06-29

    申请人： Howard Pinder ,  Luis Rovira ,  William Cooper

    发明人： Howard Pinder ,  Luis Rovira ,  William Cooper

    IPC分类号： H04N7/173 ,  H04N7/167

    CPC分类号： H04N21/23473 ,  H04N7/1675 ,  H04N21/23476 ,  H04N21/23608 ,  H04N21/23897 ,  H04N21/4325

    摘要： Partial pre-encryption with network-based packet sorting. A video-on-demand (VOD) delivery system for delivering encrypted transport streams to incumbent and overlay set-top boxes utilizes a packet picker/duplicator for sorting selected packets from non-selected packets, duplicating the selected packets, and encrypting one of the pair of duplicated selected packets according to an incumbent encryption scheme. A VOD file server stores the transport stream from the packet picker/duplicator. A network sorter sorts the unencrypted selected packet from the non-selected packets and the encrypted selected packet. The network sorter also sorts the encrypted selected packet from the non-selected packets and encrypts the unencrypted selected packets and the non-selected packets according to an overlay encryption scheme and then sends the transport stream to an overlay set-top box. The network sorter is also responsible for combining the non-selected packets and the incumbent encrypted packets and to send the transport stream to an incumbent set-top box.

    摘要翻译： 部分预加密与基于网络的数据包排序。 用于将加密的传输流传送到现有和覆盖的机顶盒的视频点播（VOD）传送系统利用分组选择器/复制器，用于从未选择的分组排序所选择的分组，复制所选择的分组，以及加密所选择的分组之一 一对根据现有加密方案的重复选择的分组。 VOD文件服务器存储来自分组选择器/复制器的传输流。 网络分类器从未选择的分组和加密的选择的分组排序未加密的选择的分组。 网络分拣机还从未选择的分组对加密的选择分组进行排序，并根据覆盖加密方案加密未加密的选择分组和未选择的分组，然后将传输流发送到覆盖机顶盒。 网络分拣机还负责组合未选择的分组和现有加密分组，并将传输流发送到现有的机顶盒。