公开(公告)号：US20110162024A1

公开(公告)日：2011-06-30

申请号：US12930063

申请日：2010-12-27

申请人： Ramanathan T. Jagadeesan ,  Kristen Marie Robins ,  Bich Tu Nguyen ,  Fang Wu

发明人： Ramanathan T. Jagadeesan ,  Kristen Marie Robins ,  Bich Tu Nguyen ,  Fang Wu

IPC分类号： H04N7/173

CPC分类号： H04L12/2854

摘要： A system for multicast streaming of programs over a packet network includes a node having a processor that conditions a video bitstream such that packets containing an I-frame are located near program specific information (PSI) packets, the processor marking a random join point (RJP) in the video bitstream immediately preceding the I-frame and PSI packets, the node outputting the conditioned and marked video bitstream across the packet network. An edge device of the network includes a buffer that caches packets of the conditioned and marked video bitstream video starting at the RJP, and sends the cached packets to a client receiver.

公开(公告)号：US20110131622A1

公开(公告)日：2011-06-02

申请号：US13016773

申请日：2011-01-28

申请人： Fang Wu ,  Jack C. Cham ,  Michael Pereira

发明人： Fang Wu ,  Jack C. Cham ,  Michael Pereira

IPC分类号： H04L12/56 ,  H04N7/173

CPC分类号： H04N21/434 ,  H04N5/4401 ,  H04N21/2187 ,  H04N21/2402 ,  H04N21/4331 ,  H04N21/4384 ,  H04N21/4622 ,  H04N21/4667 ,  H04N21/6125 ,  H04N21/6175

摘要： In a packet based multicast video streaming network, a method for minimizing delay in displaying video on a TV set in response to a viewer changing the channel is disclosed. For each live multicast video stream, one or more reference frames and corresponding compressed frames are temporarily stored in a memory in anticipation of the viewer switching to that particular program. When the viewer changes channels, the previously stored reference and compressed frames are immediately read from the memory and rendered for display on the TV. This eliminates the need to wait for the next available reference frame. In other words, this eliminates a temporary blank TV screen each time the channel is changed. Certain compressed frames are dropped and blank frames can be inserted in order to catch up to and synchronize with the live video broadcast. The particular frames to be dropped and the number of blank frames to be inserted is a function of the bandwidth limitation imposed by the last mile of the network.

摘要翻译： 在基于分组的多播视频流网络中，公开了一种用于响应于观看者改变频道而在电视机上显示视频的延迟最小化的方法。 对于每个实时多播视频流，预期观众切换到该特定节目，一个或多个参考帧和对应的压缩帧被临时存储在存储器中。 当观众改变频道时，先前存储的参考和压缩帧立即从存储器中读出并呈现在TV上显示。 这消除了等待下一个可用参考帧的需要。 换句话说，这消除了每次通道改变时的临时空白电视屏幕。 某些压缩帧被丢弃，并且可以插入空白帧以便赶上并与实时视频广播同步。 要删除的特定帧和要插入的空白帧的数量是由网络的最后一英里施加的带宽限制的函数。

公开(公告)号：US07649938B2

公开(公告)日：2010-01-19

申请号：US10970129

申请日：2004-10-21

申请人： Wen-hsiung Chen ,  Fang Wu ,  Philip R. Graham ,  Gregory D. Pelton ,  Blane A. Eisenberg

发明人： Wen-hsiung Chen ,  Fang Wu ,  Philip R. Graham ,  Gregory D. Pelton ,  Blane A. Eisenberg

IPC分类号： H04N7/12 ,  H04N7/18

CPC分类号： H04N19/115 ,  G08B13/19656 ,  G08B13/19667 ,  H04N7/181 ,  H04N7/185 ,  H04N19/14 ,  H04N19/179 ,  H04N19/40 ,  H04N19/61

摘要： An apparatus, a method, and a software product to control a plurality of surveillance video camera/encoder combinations. The method includes receiving a plurality of encoded video streams from a respective surveillance camera/encoder combination, and accepting a measure of the level of activity for each encoded video stream. Each measure is obtained from the output of the camera of the corresponding camera/encoder combination. The method further includes assigning output bit rates for each encoded stream according to the accepted level of activity such that a maximum overall bit rate is not exceeded. One version is for controlling camera/encoder combinations that accept remote bit rate control, and a second is for controlling camera/encoder combinations that send at a pre-set bit rate. One version includes a network connection between the camera/encoder combinations, and the method or apparatus for central control.

摘要翻译： 一种用于控制多个监视摄像机/编码器组合的装置，方法和软件产品。 该方法包括从相应的监视摄像机/编码器组合接收多个编码视频流，并且接受每个编码视频流的活动级别的度量。 每个测量都是从相应的相机/编码器组合的相机的输出中获得的。 该方法还包括根据接受的活动级别为每个编码流分配输出比特率，使得不超过最大总比特率。 一个版本用于控制接受远程比特率控制的摄像机/编码器组合，第二个是用于控制以预设比特率发送的摄像机/编码器组合。 一个版本包括相机/编码器组合之间的网络连接以及用于中央控制的方法或装置。

公开(公告)号：US07593433B1

公开(公告)日：2009-09-22

申请号：US11074554

申请日：2005-03-07

申请人： Fang Wu ,  Sangeeta Ramakrishnan ,  Ji Zhang

发明人： Fang Wu ,  Sangeeta Ramakrishnan ,  Ji Zhang

IPC分类号： H04J3/02

CPC分类号： H04L12/6418 ,  H04J14/0227 ,  H04N21/23655

摘要： A system and method for multiple channel statistical re-multiplexing preferably includes a plurality of encoders each coupled to a respective channel and producing a compressed channel, a statistical re-multiplexer and a transport medium. The statistical re-multiplexer preferably has a plurality of inputs and an output for combining the input compressed channels into a single output bit stream. The statistical multiplexer further includes a plurality of de-multiplexers and a scheduler & multiplexer having a plurality of buffers, a scheduling table and a controller. Each of the buffers receives and stores compressed data from a respective encoder for a respective channel. The output of each buffer is coupled to a respective de-multiplexer that re-encodes the compressed channel in response to control signals from the scheduler & multiplexer. The scheduler and multiplexer receive the re-multiplexed streams from the re-multiplexers, and combine them into a single stream that matches the bandwidth of the physical transport medium.

摘要翻译： 用于多信道统计重新复用的系统和方法优选地包括多个编码器，每个编码器耦合到相应的信道并产生压缩信道，统计再复用器和传输介质。 统计再复用器优选地具有多个输入和用于将输入的压缩信道组合成单个输出比特流的输出。 统计复用器还包括多个解复用器和具有多个缓冲器的调度器和多路复用器，调度表和控制器。 每个缓冲器从相应的编码器接收并存储用于相应通道的压缩数据。 每个缓冲器的输出耦合到相应的去多路复用器，其响应于来自调度器和多路复用器的控制信号重新编码压缩信道。 调度器和多路复用器从重新复用器接收重新复用的流，并将它们组合成与物理传输介质的带宽匹配的单个流。

公开(公告)号：US20090168781A1

公开(公告)日：2009-07-02

申请号：US12397740

申请日：2009-03-04

申请人： Kwok T. Fung ,  Denny Ko ,  Emmanuel K. Sam ,  Fang Wu ,  Eberhard F. Wunderlich

发明人： Kwok T. Fung ,  Denny Ko ,  Emmanuel K. Sam ,  Fang Wu ,  Eberhard F. Wunderlich

IPC分类号： H04L12/56

CPC分类号： H04L63/0272 ,  H04L65/1069 ,  H04M7/006 ,  Y10S379/90 ,  Y10S379/901

摘要： The presently disclosed architecture enables a service provider to support public voice VPN services over an IP VPN network. The architecture utilizes a customer VPN, a designated gateway for the customer VPN, an IP VPN transport network, and a Call Control Element/router Complex which uses IP technology to map between the IP VPN and the voice VPN. With such an arrangement, the customer VPN is extended to the gatekeeper of the Call Control Element/router Complex, thereby enabling the provision of voice VPN services over an IP network.

摘要翻译： 目前公开的架构使得服务提供商能够通过IP VPN网络来支持公共语音VPN服务。 该架构使用客户VPN，客户VPN的指定网关，IP VPN传输网络和使用IP技术在IP VPN和语音VPN之间映射的呼叫控制元素/路由器复合体。 通过这种安排，客户VPN被扩展到呼叫控制元件/路由器复合体的网守，从而能够通过IP网络提供语音VPN服务。

公开(公告)号：US07533410B1

公开(公告)日：2009-05-12

申请号：US09948268

申请日：2001-09-06

申请人： Kwok T. Fung ,  Denny Ko ,  Emmanuel K. Sam ,  Fang Wu ,  Eberhard F. Wunderlich

发明人： Kwok T. Fung ,  Denny Ko ,  Emmanuel K. Sam ,  Fang Wu ,  Eberhard F. Wunderlich

IPC分类号： H04L29/00

CPC分类号： H04L63/0272 ,  H04L65/1069 ,  H04M7/006 ,  Y10S379/90 ,  Y10S379/901

摘要： The presently disclosed architecture enables a service provider to support public voice VPN services over an IP VPN network. The architecture utilizes a customer VPN, a designated gateway for the customer VPN, an IP VPN transport network, and a Call Control Element/router Complex which uses IP technology to map between the IP VPN and the voice VPN. With such an arrangement, the customer VPN is extended to the gatekeeper of the Call Control Element/router Complex, thereby enabling the provision of voice VPN services over an IP network.

摘要翻译： 目前公开的架构使得服务提供商能够通过IP VPN网络来支持公共语音VPN服务。 该架构使用客户VPN，客户VPN的指定网关，IP VPN传输网络和使用IP技术在IP VPN和语音VPN之间映射的呼叫控制元素/路由器复合体。 通过这种安排，客户VPN被扩展到呼叫控制元件/路由器复合体的网守，从而能够通过IP网络提供语音VPN服务。

公开(公告)号：US07499596B2

公开(公告)日：2009-03-03

申请号：US11069622

申请日：2005-02-28

申请人： Wen-hsiung Chen ,  Fang Wu ,  Gregory D. Pelton

发明人： Wen-hsiung Chen ,  Fang Wu ,  Gregory D. Pelton

IPC分类号： G06K9/36

CPC分类号： H04N19/93 ,  H04N19/60 ,  H04N19/91

摘要： A method, apparatus, and a computer readable hardware storage medium with instructions to encode a series of quantized transform coefficients. The method includes identifying runs of one or more non-zero coefficients, and for each such run, identifying events of consecutive amplitude-1 coefficients followed by a single amplitude>1 coefficient. The method further includes encoding the identified event with a codeword, each event identified according to the length of the consecutive amplitude-1 coefficients and the amplitude of the ending coefficient. The method is such that relatively short codewords are formed to represent values or sequences of values that are relatively more likely-to-occur, and relatively long codewords are formed to represent values or sequences of values that are relatively less likely-to-occur. The method is applicable to encoding a region in the series where there is likely to be a cluster of non-zero-valued coefficients.

摘要翻译： 一种具有编码一系列量化变换系数的指令的方法，装置和计算机可读硬件存储介质。 该方法包括识别一个或多个非零系数的运行，并且对于每个这样的运行，识别连续的幅度-1系数的事件，之后是单个幅度> 1系数。 该方法还包括用码字对识别的事件进行编码，每个事件根据连续的幅度-1系数的长度和结束系数的幅度来识别。 该方法使得形成相对短的码字以表示相对更可能发生的值的值或序列，并且形成相对长的码字以表示相对较不可能发生的值的值或序列。 该方法适用于对可能存在非零值系数的簇的系列中的区域进行编码。

公开(公告)号：US07471841B2

公开(公告)日：2008-12-30

申请号：US11069620

申请日：2005-02-28

申请人： Fang Wu ,  Wen-hsiung Chen

发明人： Fang Wu ,  Wen-hsiung Chen

IPC分类号： G06K9/36 ,  H03M7/34

CPC分类号： H04N19/136 ,  H04N19/12 ,  H04N19/147 ,  H04N19/91

摘要： A method, a carrier medium, and an apparatus to process a plurality of ordered series of quantized coefficients of a block of an image to reduce the amount of data used to represent the image. The method includes establishing a breakpoint along the ordering of the series to define a first contiguous region and a second contiguous region, such that clusters of consecutive signals of non-zero values occur mostly in the first contiguous region. Establishing the breakpoint uses statistics calculated from at least a subset of the plurality, the statistics being of where, along the ordering of the plurality of the series, coefficients of any non-zero value occur in clusters of consecutive non-zero coefficients. For each series in the plurality, the signals in the first region are encoded using a first region encoding method, and the signals in the second region are encoded using a second region encoding method.

摘要翻译： 一种方法，载体介质和用于处理图像块的多个有序序列的量化系数的装置，以减少用于表示图像的数据量。 该方法包括沿着该序列的顺序建立断点以定义第一连续区域和第二连续区域，使得非零值的连续信号簇主要出现在第一连续区域中。 建立断点使用从多个的至少一个子集计算出的统计量，统计数据是沿着多个序列的顺序，任何非零值的系数出现在连续的非零系数的群集中。 对于多个中的每个系列，使用第一区域编码方法对第一区域中的信号进行编码，并且使用第二区域编码方法对第二区域中的信号进行编码。

公开(公告)号：US20080080808A1

公开(公告)日：2008-04-03

申请号：US11882126

申请日：2007-07-31

申请人： Valery Tolshikhin ,  Fang Wu

发明人： Valery Tolshikhin ,  Fang Wu

IPC分类号： G02B6/12

CPC分类号： G02B6/1228 ,  G02B6/12007 ,  H01L31/0304 ,  H01L31/03046 ,  H01L31/105 ,  H01L31/12 ,  H01S5/02248 ,  H01S5/026 ,  H01S5/0264 ,  H01S5/1014 ,  H01S5/1032 ,  H01S5/2027

摘要： The invention describes an integrated-photonics arrangement, implementable in a multi-layer III-V semiconductor structure, which has a semiconductor substrate; an epitaxial semiconductor structure grown on this substrate in one growth step; a common waveguide; and a plurality of wavelength-designated waveguides; all the waveguides being formed in this epitaxial structure using conventional semiconductor processing techniques. Each waveguide being defined by the bandgap wavelength of its core region and all the waveguides being arranged vertically in order of ascending bandgap wavelength; with the common waveguide placed at the bottom of the structure and the wavelength-designated waveguide having the longest bandgap wavelength placed at the top of the structure. In use, the bandgap wavelength of the common waveguide being well below any operating wavelength, therefore providing conditions for low-loss propagation of each operating wavelength to its designated waveguide through the common waveguide. The invention discloses a method of wavelength demultiplexing (multiplexing) for optical signals in a plurality of wavelengths, which are co- or bi-directionally propagating within the integrated-photonics arrangement, by vertical splitting them from (combining them into) the common waveguide into (from) wavelength designated waveguides.

摘要翻译： 本发明描述了具有半导体衬底的多层III-V半导体结构中可实现的集成光子学布置; 在一个生长步骤中在该衬底上生长的外延半导体结构; 一个普通波导; 和多个波长指定的波导; 使用常规半导体处理技术在所述外延结构中形成所有波导。 每个波导由其核心区域的带隙波长限定，并且所有的波导以上升带隙波长的顺序垂直排列; 其中公共波导放置在结构的底部，并且具有最长带隙波长的波长指定的波导放置在结构的顶部。 在使用中，公共波导的带隙波长远低于任何工作波长，因此通过公共波导为每个工作波长的低损耗传播提供给其指定波导的条件。 本发明公开了一种对多个波长的光信号进行波长解复用（多路复用）的方法，该多个波长通过将共同的波导垂直分离（共同组合）到共同的波导中而共同或双向传播， （从）波长指定波导。

公开(公告)号：US20070133890A1

公开(公告)日：2007-06-14

申请号：US11675566

申请日：2007-02-15

申请人： Wen-hsiung Chen ,  Fang Wu ,  Gregory Pelton

发明人： Wen-hsiung Chen ,  Fang Wu ,  Gregory Pelton

IPC分类号： G06K9/36

CPC分类号： H04N19/93 ,  H04N19/60 ,  H04N19/90 ,  H04N19/91

摘要： A method and an apparatus to decode a bitstream that includes codewords formed by a method of encoding series of quantized coefficients of a transform of a block of image data. The encoding method includes forming events from the series of quantized transform coefficients, each event being a run of none or more zero-valued coefficients followed by a run of one of a predefined set of sequences, each sequence in the set being either a single coefficient of amplitude greater than one, or a sequence of 1's and 0's starting with a coefficient of amplitude 1. The encoding method includes forming a codeword for each formed event. The decoding includes decoding recognized events until all the coefficients in a series of quantized transform coefficients is formed.

摘要翻译： 一种用于对比特流进行解码的方法和装置，其包括由图像数据块的变换的一系列量化系数的编码方法形成的码字。 编码方法包括从一系列量化变换系数中形成事件，每个事件是一个或多个零值系数的运行，随后运行一组预定义的序列，集合中的每个序列都是单个系数 幅度大于1，或以幅度1的系数开始的1和0的序列。编码方法包括为每个形成的事件形成码字。 解码包括解码识别的事件，直到形成一系列量化变换系数中的所有系数。