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    Varying home network encryption techniques
    2.
    发明授权
    Varying home network encryption techniques 有权
    不同的家庭网络加密技术

    公开(公告)号：US09191373B2

    公开(公告)日：2015-11-17

    申请号：US13533022

    申请日：2012-06-26

    申请人： Sherman (Xuemin) Chen ,  Stephen Palm ,  Jeyhan Karaoguz

    发明人： Sherman (Xuemin) Chen ,  Stephen Palm ,  Jeyhan Karaoguz

    IPC分类号： G06F11/00 ,  H04L29/06 ,  H04N21/436 ,  H04N21/4367 ,  H04N21/4408

    CPC分类号： H04L63/0428 ,  H04L63/162 ,  H04N21/43615 ,  H04N21/4367 ,  H04N21/4408

    摘要： A premises based multimedia communication system includes a source device that produces multimedia content, a rendering device that presents the multimedia content, and a premises communication network coupling the source device to the rendering device. The system determines a bit error rate of the premises communication network, transfers the multimedia content from the source device to the rendering device, and when the bit error rate exceeds a bit error rate threshold, the system at least partially disables link layer encryption of video frames of the multimedia content transfer. With the link layer operations at least partially disabled, the system can enable, at least partially, content layer encryption operations for the transfer of the multimedia content from the source device to the rendering device.

    摘要翻译： 基于场所的多媒体通信系统包括产生多媒体内容的源设备，呈现多媒体内容的呈现设备以及将源设备耦合到呈现设备的房屋通信网络。 该系统确定房屋通信网络的误码率，将多媒体内容从源设备传送到呈现设备，并且当比特错误率超过误码率阈值时，系统至少部分地禁用视频的链路层加密 多媒体内容传输的帧。 在链路层操作至少部分被禁用的情况下，系统可以至少部分地启用用于将多媒体内容从源设备传送到呈现设备的内容层加密操作。

    Pseudo-random number generation based on periodic sampling of one or more linear feedback shift registers
    5.
    发明授权
    Pseudo-random number generation based on periodic sampling of one or more linear feedback shift registers 有权
    基于一个或多个线性反馈移位寄存器的周期性采样的伪随机数生成

    公开(公告)号：US08831216B2

    公开(公告)日：2014-09-09

    申请号：US13551690

    申请日：2012-07-18

    申请人： Wade Keith Wan ,  Sherman (Xuemin) Chen

    发明人： Wade Keith Wan ,  Sherman (Xuemin) Chen

    IPC分类号： G06F21/00 ,  H04L9/06

    CPC分类号： H04L9/0668

    摘要： Disclosed are various embodiments for generating pseudo-random numbers. One such embodiment is an apparatus comprising digital hardware configured to generate pseudo-random numbers. The apparatus uses a linear feedback shift register in which the correlation between successive pseudo-random numbers is reduced.

    摘要翻译： 公开了用于生成伪随机数的各种实施例。 一个这样的实施例是包括被配置为产生伪随机数的数字硬件的装置。 该装置使用线性反馈移位寄存器，其中连续伪随机数之间的相关性减小。

    Method and system for robust watermark insertion and extraction for digital set-top boxes
    6.
    发明授权
    Method and system for robust watermark insertion and extraction for digital set-top boxes 有权
    用于数字机顶盒鲁棒水印插入和提取的方法和系统

    公开(公告)号：US08806215B2

    公开(公告)日：2014-08-12

    申请号：US13604914

    申请日：2012-09-06

    申请人： Sherman Xuemin Chen ,  Stephane Rodgers

    发明人： Sherman Xuemin Chen ,  Stephane Rodgers

    IPC分类号： H04L9/32 ,  H04N7/167

    CPC分类号： H04H20/31 ,  G06T1/0021 ,  H04H2201/50 ,  H04N5/4401 ,  H04N19/44 ,  H04N19/467 ,  H04N21/23892 ,  H04N21/43853 ,  H04N21/8358

    摘要： Methods and systems for robust watermark insertion and extraction for digital set-top boxes are disclosed and may include descrambling, detecting watermarking messages in a received video signal utilizing a watermark message parser, and immediately watermarking the descrambled video signal utilizing an embedded CPU. The embedded CPU may utilize code that may be signed by an authorized key, encrypted externally to the chip, decrypted, and stored in memory in a region off-limits to other processors. The video signal may be watermarked in a decompressed domain. The enabling of the watermarking may be verified utilizing a watchdog timer. The descriptors corresponding to the watermarking may be stored in memory that may be inaccessible by the main CPU. The watermark may comprise unique identifier data specific to the chip and a time stamp, and may be encrypted utilizing an on-chip combinatorial function.

    摘要翻译： 公开了用于数字机顶盒的鲁棒水印插入和提取的方法和系统，并且可以包括解扰，利用水印消息解析器检测接收到的视频信号中的水印消息，并立即利用嵌入式CPU对解扰的视频信号进行加水印。 嵌入式CPU可以利用可以通过授权密钥进行签名的代码，在芯片外部加密，解密并存储在与其他处理器不同的区域的存储器中。 视频信号可以在解压缩域中加水印。 可以使用看门狗定时器来验证水印的使能。 与水印相对应的描述符可以存储在主CPU可能无法访问的存储器中。 水印可以包括专用于芯片的唯一标识符数据和时间标记，并且可以使用片上组合功能进行加密。

    Communication Over Bandwidth-Constrained Network
    9.
    发明申请
    Communication Over Bandwidth-Constrained Network 有权
    通过带宽约束网络进行通信

    公开(公告)号：US20130262622A1

    公开(公告)日：2013-10-03

    申请号：US13434949

    申请日：2012-03-30

    申请人： Gordon Yong LI ,  Sherman (Xuemin) Chen

    发明人： Gordon Yong LI ,  Sherman (Xuemin) Chen

    IPC分类号： G06F15/16

    CPC分类号： H04L65/607 ,  H04L29/06 ,  H04L65/1026 ,  H04L65/605 ,  H04L65/80

    摘要： An apparatus and a system are provided to proxy one or more media signals between at least one local client device and at least one remote client device. For instance, the apparatus can include a first network interface, a media dispatcher, and a second network interface. The first network interface can be configured to receive a single media signal of the one or more media signals from a local client device via a first communication network with an asymmetric communication protocol (e.g., Data Over Cable Service Interface Specification and Digital Subscriber Line). The media dispatcher can be configured to duplicate the single media signal into a plurality of duplicate media signals. Further, the second network interface can be configured to transmit the plurality of duplicate media signals to a plurality of remote client devices over a second communication network.

    摘要翻译： 提供了一种装置和系统来代理至少一个本地客户端设备和至少一个远程客户端设备之间的一个或多个媒体信号。 例如，该装置可以包括第一网络接口，媒体分派器和第二网络接口。 第一网络接口可以被配置为经由具有非对称通信协议（例如，电缆数据服务接口规范和数字用户线路）的第一通信网络从本地客户端设备接收一个或多个媒体信号的单个媒体信号。 媒体调度器可以被配置为将单个媒体信号复制成多个重复的媒体信号。 此外，第二网络接口可以被配置为通过第二通信网络将多个重复的媒体信号发送到多个远程客户端设备。

    Latency Aware Priority Based Multi-Channel Decoding
    10.
    发明申请
    Latency Aware Priority Based Multi-Channel Decoding 有权
    基于延迟意识优先级的多信道解码

    公开(公告)号：US20130170560A1

    公开(公告)日：2013-07-04

    申请号：US13339674

    申请日：2011-12-29

    申请人： Michael (Zhijie) Yang ,  Sherman (Xuemin) Chen ,  Brian Heng

    发明人： Michael (Zhijie) Yang ,  Sherman (Xuemin) Chen ,  Brian Heng

    IPC分类号： H04N7/26

    CPC分类号： H04N19/436 ,  H04N19/44

    摘要： Various methods and systems are provided for latency aware priority based decoding. In one embodiment, among others, a method includes providing coded frames of a first input stream to a multiple channel (multi-channel) decoder for decoding. A second input stream is obtained and a latency priority associated with the second input stream is determined. Coded frames from the first and second input streams are provided to the multi-channel decoder for decoding in an order based upon the latency priorities associated with the first and second input streams. In another embodiment, a multi-channel decoding system includes a multi-channel decoder configured to decode coded frames and a decoder input scheduler configured to provide coded frames from a plurality of input streams to the multi-channel decoder for decoding. The coded frames are provided to the multi-channel decoder in an order based at least in part upon latency priorities associated with the input streams.

    摘要翻译： 提供用于基于等待时间优先级的解码的各种方法和系统。 在一个实施例中，一种方法包括将第一输入流的编码帧提供给多通道（多通道）解码器进行解码。 获得第二输入流并且确定与第二输入流相关联的等待时间优先级。 基于与第一和第二输入流相关联的等待时间优先级，将来自第一和第二输入流的编码帧提供给多声道解码器以进行解码。 在另一个实施例中，多通道解码系统包括被配置为对编码帧进行解码的多通道解码器，以及解码器输入调度器，被配置为将多个输入流中的编码帧提供给多通道解码器进行解码。 编码帧至少部分地基于与输入流相关联的等待时间优先级以顺序提供给多声道解码器。