公开(公告)号：US20120320779A1

公开(公告)日：2012-12-20

申请号：US13579166

申请日：2011-03-16

申请人： Alan P. Smith ,  Arnaud Jacquet ,  Robert J. Briscoe ,  Andrea Soppera ,  Stephen C. Appleby ,  Tobias Moncaster

发明人： Alan P. Smith ,  Arnaud Jacquet ,  Robert J. Briscoe ,  Andrea Soppera ,  Stephen C. Appleby ,  Tobias Moncaster

IPC分类号： H04L12/26

CPC分类号： H04L47/35 ,  H04L47/10 ,  H04L47/11 ,  H04L47/26 ,  H04L47/283 ,  H04L47/31 ,  H04L2012/5629

摘要： Methods, apparatus and other means for providing path characterisation information to a data sender relating to a network characteristic such as congestion experienced by data units traversing a path across a data network from the data sender towards one of a plurality of data receivers, the data units having associated therewith information indicative of the network characteristic, the path being traversed by the data units having at least a first path portion between said data sender and a proxy node along which data units may traverse conveying a measure indicative of the network characteristic that is representable by any of a first set of codepoints, the data receivers being operable to provide data acknowledgement units in respect of data units they receive via a second path portion in which information indicative of the network characteristic may only be representable using codepoints of a second set of codepoints having less codepoints than the first set of codepoints.

摘要翻译： 用于向数据发送者提供与网络特性相关的路径表征信息的方法，装置和其他装置，例如数据单元穿过数据网络从数据发送器到多个数据接收器之一的路径所经历的拥塞，数据单元 具有指示网络特性的信息，由数据单元遍历的路径，所述数据单元具有在所述数据发送者和代理节点之间的至少第一路径部分，数据单元可沿着该代理节点传送指示可表示的网络特性的度量 通过第一组码点中的任何一个，数据接收器可操作用于经由第二路径部分提供关于它们接收的数据单元的数据确认单元，其中指示网络特性的信息仅可使用第二组码的代码点来表示 具有比第一组码点少的编码点的编码点。

公开(公告)号：US20110296485A1

公开(公告)日：2011-12-01

申请号：US13201261

申请日：2010-02-05

申请人： Michael E. Nilsson ,  Rory S. Turnbull ,  Ian B. Crabtree ,  Stephen C. Appleby ,  Patrick J. Mulroy

发明人： Michael E. Nilsson ,  Rory S. Turnbull ,  Ian B. Crabtree ,  Stephen C. Appleby ,  Patrick J. Mulroy

IPC分类号： H04N7/173

CPC分类号： H04L12/5695 ,  H04L47/10 ,  H04L47/38 ,  H04L47/70 ,  H04L47/801 ,  H04L47/822 ,  H04L47/826 ,  H04L65/602 ,  H04L65/80

摘要： A video sequence is to be transmitted at a selectable quality from a server over a network. A network control protocol operates in response to a control parameter to allocate to the server a share of available transmission capacity in proportion to the value of the control parameter. First, one determines a plurality of transmission rate values that are needed over successive time periods of the sequence for successful transmission of the sequence at a reference quality; then the control parameter is set, proportional to the transmission rate value and communicated to the control protocol at corresponding time instants. The sequences can then be transmitted, encoded at a quality from time to time selected in dependence upon the actual transmission capacity made available by the network to the server.

摘要翻译： 以可选择的质量通过网络从服务器发送视频序列。 网络控制协议响应于控制参数而操作，以与控制参数的值成比例地向服务器分配可用传输容量的份额。 首先，确定在序列的连续时间段中以参考质量成功传输序列所需的多个传输速率值; 然后将控制参数设置为与传输速率值成比例，并在相应的时刻传达给控制协议。 然后可以按照根据网络向服务器提供的实际传输容量不时选择的质量来传输，编码序列。

公开(公告)号：US20100150241A1

公开(公告)日：2010-06-17

申请号：US12295772

申请日：2007-04-03

申请人： Michael Erling NILSSON ,  Stephen C. Appleby

发明人： Michael Erling NILSSON ,  Stephen C. Appleby

IPC分类号： H04N7/26

CPC分类号： H04N19/194 ,  H04N19/124 ,  H04N19/137 ,  H04N19/147 ,  H04N19/15 ,  H04N19/159 ,  H04N19/176

摘要： A video signal is coded using predictive coding. The degree of quantisation that is applied is varied as a function of measures of predictive power, the idea being that a picture that is useful as a predictor for other pictures is worth coding well. These measures are formed in a pre-analysis of the pictures to obtain, for each macroblock analysed, a measure that depends on its similarity to a region for which it is a potential predictor. Preferably these measures are cumulative.

摘要翻译： 视频信号使用预测编码进行编码。 所应用的量化程度作为预测能力的度量的函数而变化，其想法是可用作其他图像的预测器的图像值得编码。 这些测量是在图像的预分析中形成的，对于每个分析的宏块，获得取决于其与其潜在预测器的区域的相似度的度量。 优选地，这些措施是累积的。

公开(公告)号：US20110292801A1

公开(公告)日：2011-12-01

申请号：US13201268

申请日：2010-02-02

申请人： Rory Stewart Turnbull ,  Michael E. Nilsson ,  Stephen C. Appleby ,  Ian B. Crabtree

发明人： Rory Stewart Turnbull ,  Michael E. Nilsson ,  Stephen C. Appleby ,  Ian B. Crabtree

IPC分类号： H04L12/26

CPC分类号： H04L47/10 ,  H04L45/24 ,  H04L47/122 ,  H04L47/193

摘要： There is proposed a modification to the ECN protocol to remove the one-to-one relationship between the network signalling congestion and the sender response to that congestion. The result is to allow a receiver terminal to exhibit some control of bandwidth share relative to other receiver terminals. The idea is to calculate the average CE arrival frequency from received data packets and to set ECE flags at a rate determined as a function of the average CE arrival frequency. Preferably, the function is a multiplier applied to the average CE arrival frequency. The effect of averaging the CE arrival frequency as well as application of a multiplier is a decoupling of the ECE marked ACKs sent by a receiver to the sender, and control of the resulting transmission rate at the sender.

摘要翻译： 提出了对ECN协议的修改以消除网络信令拥塞与对该拥塞的发送者响应之间的一对一关系。 结果是允许接收机终端相对于其他接收机终端表现出对带宽共享的一些控制。 这个想法是从接收的数据包计算平均CE到达频率，并以按照CE平均值到达频率确定的速率来设置ECE标志。 优选地，该功能是适用于平均CE到达频率的乘数。 CE到达频率的平均和乘法器的应用的效果是接收机发送的ECE标记的ACK对发送方的去耦，并且控制发送方产生的传输速率。

公开(公告)号：US20100128604A1

公开(公告)日：2010-05-27

申请号：US12594280

申请日：2008-03-27

申请人： Stephen C. Appleby ,  Patrick J. Mulroy

发明人： Stephen C. Appleby ,  Patrick J. Mulroy

IPC分类号： H04L12/26 ,  H04N11/02

CPC分类号： H04L65/602 ,  H04L65/4084 ,  H04L65/80 ,  H04N19/115 ,  H04N19/164 ,  H04N21/23106 ,  H04N21/2365 ,  H04N21/23655 ,  H04N21/2385 ,  H04N21/2402 ,  H04N21/26216 ,  H04N21/4347 ,  H04N21/47202 ,  H04N21/64322 ,  H04N21/8456

摘要： The bitrate for any practical video streaming system will vary considerably as a function of the difficulty of encoding the sequence in question. This variation is even more apparent when comparing different video clips of different genres for example where sports clips might require a higher average bitrate and fluctuate more due to the high activity of typical scenes, whereas a news report clip might require a much lower bitrate and be relatively static. As such, to deliver video streams at a constant quality to users sharing a contended network, a constant bandwidth method is not efficient to use across all the streams. The bandwidth allocated to each stream must be allowed to dynamically vary in time in accordance with the precise demands of the video being streamed at that time and also be within any network bandwidth constraints. The present invention defines such a method.

摘要翻译： 任何实际的视频流系统的比特率将随编码所述序列的难度而变化很大。 当比较不同类型的不同视频剪辑时，这种变化更加明显，例如，运动剪辑可能需要更高的平均比特率，并且由于典型场景的高活动而波动更多，而新闻报道剪辑可能需要低得多的比特率 比较静态 因此，为了将共享竞争网络的用户以恒定的质量传送视频流，恒定带宽方法在所有流中使用是无效的。 必须允许分配给每个流的带宽在时间上根据当时流传输的视频的精确需求而动态变化，并且也在任何网络带宽限制内。 本发明定义了这种方法。