公开(公告)号：US07898950B2

公开(公告)日：2011-03-01

申请号：US11506429

申请日：2006-08-18

Applicant: Warren V. Barkley ,  Philip A. Chou ,  Regis J. Crinon ,  Tim Moore

Inventor： Warren V. Barkley ,  Philip A. Chou ,  Regis J. Crinon ,  Tim Moore

IPC: H04Q11/00 ,  H04L12/16

CPC classification number: H04Q11/00 ,  H04Q2213/13103 ,  H04Q2213/1324 ,  H04Q2213/13248 ,  H04Q2213/13332 ,  H04Q2213/13335 ,  H04Q2213/13337

Abstract: Techniques to perform rate matching for multimedia conference calls are described. An apparatus may comprise a conferencing server and a rate matching module. The rate matching module may be arranged to adjust bit rates between media communications channels for client terminals in a conference call, with the rate matching module to remove video frames from a set of video information received on a first media communications channel to reduce a bit rate for the video information. Other embodiments are described and claimed.

Abstract translation: 描述了进行多媒体电话会议速率匹配的技术。 设备可以包括会议服务器和速率匹配模块。 速率匹配模块可以被布置为在电话会议中调整用于客户终端的媒体通信信道之间的比特率，速率匹配模块从在第一媒体通信信道上接收的一组视频信息中去除视频帧以减少比特率 为视频信息。 描述和要求保护其他实施例。

公开(公告)号：US20100315482A1

公开(公告)日：2010-12-16

申请号：US12484906

申请日：2009-06-15

Applicant: Daniel A. Rosenfeld ,  Zicheng Liu ,  Ross G. Cutler ,  Philip A. Chou ,  Christian Huitema ,  Kori Quinn

Inventor： Daniel A. Rosenfeld ,  Zicheng Liu ,  Ross G. Cutler ,  Philip A. Chou ,  Christian Huitema ,  Kori Quinn

IPC: H04N7/15

CPC classification number: H04N7/147 ,  H04L12/1827 ,  H04L65/403 ,  H04M3/564 ,  H04M3/567 ,  H04M2201/20 ,  H04M2203/2044 ,  H04M2203/5018 ,  H04M2203/5072 ,  H04S7/303 ,  H04S2400/01 ,  H04S2400/13

Abstract: Gaze tracking or other interest indications are used during a video conference to determine one or more audio sources that are of interest to one or more participants to the video conference, such as by determining a conversation from among multiple conversations that a subset of participants are participating in or listening to, for enhancing the audio experience of one or more of the participants.

Abstract translation: 在视频会议期间使用凝视跟踪或其他兴趣指示来确定一个或多个视频会议的一个或多个参与者感兴趣的一个或多个音频源，例如通过确定参与者的子集参与的多个对话中的会话 在或听取，以增强一个或多个参与者的音频体验。

公开(公告)号：US07646816B2

公开(公告)日：2010-01-12

申请号：US09955731

申请日：2001-09-19

Applicant: Jordi Ribas-Corbera ,  Philip A. Chou

Inventor： Jordi Ribas-Corbera ,  Philip A. Chou

IPC: H04B1/66

CPC classification number: H04N19/44 ,  H04N19/115 ,  H04N19/149 ,  H04N19/152 ,  H04N19/172 ,  H04N19/61

Abstract: A method and system including an improved generalized reference decoder that operates according to any number of sets of rate and buffer parameters for a given bit stream. Each set characterizes a leaky bucket model and contains three parameters representing the transmission bit rate, buffer size, and initial decoder buffer fullness. An encoder provides at least two sets of these parameters, whereby the decoder selects one or interpolates between them to operate at any desired peak bit rate, buffer size or delay. The generalized reference decoder may select the smallest buffer size and corresponding delay that decodes the bit stream without buffer underflow or overflow, or alternatively may select and operate at the minimum required peak transmission rate, or something between both. In practice, the buffer size, delay and/or the peak transmission rate can be reduced by significant factors, and/or the signal-to-noise ratio (SNR) can be increased.

Abstract translation: 一种包括改进的通用参考解码器的方法和系统，其根据给定比特流的任何数量的速率和缓冲器参数集合进行操作。 每个集合表征泄漏桶模型，并且包含表示传输比特率，缓冲器大小和初始解码器缓冲器充满度的三个参数。 编码器提供至少两组这些参数，由此解码器在它们之间选择一个或内插，以便以任何期望的峰值比特率，缓冲器大小或延迟进行操作。 广义参考解码器可以选择最小的缓冲器大小和解码比特流而没有缓冲器下溢或溢出的对应的延迟，或者可以以最小的所需峰值传输速率选择和操作，或两者之间的东西。 实际上，可以通过显着的因素来减小缓冲器大小，延迟和/或峰值传输速率，和/或可以增加信噪比（SNR）。

公开(公告)号：US07627467B2

公开(公告)日：2009-12-01

申请号：US11173017

申请日：2005-06-30

Applicant: Dinei A. Florencio ,  Philip A. Chou

Inventor： Dinei A. Florencio ,  Philip A. Chou

IPC: G10L11/00

CPC classification number: G10L19/0212 ,  G10L19/005

Abstract: Real-time packet-based audio communications over packet-based networks frequently results in the loss of one or more packets during any given communication session. The real-time nature of such communications precludes retransmission of lost packets due to the unacceptable delays that would result. Consequently, packet loss concealment methods are employed to “hide” lost packets from the listener. Unfortunately, conventional loss concealment methods, such as packet repetition or stretch/overlap methods, do not fully exploit information available from partially received samples. Therefore, when a single frame of N coefficients is lost, 2N samples are only partially reconstructed, thereby degrading the reconstructed signal. To address this problem, an optimized packet loss concealment solution is identified for particular lost packets by solving an underdetermined system of linear equations representing partially received samples while minimizing a computed error based on a model of the signal obtained from neighboring blocks or frames received by the decoder.

Abstract translation: 基于分组的网络的基于分组的音频通信在任何给定的通信会话期间经常导致一个或多个分组的丢失。 这种通信的实时特性排除了由于导致的不可接受的延迟而丢失的分组的重传。 因此，采用分组丢失隐藏方法来“隐藏”收听者丢失的分组。 不幸的是，诸如分组重复或拉伸/重叠方法的常规丢失隐藏方法不能充分利用部分接收的样本可获得的信息。 因此，当N个系数的单个帧丢失时，2N个样本仅被部分重构，从而降低重构信号。 为了解决这个问题，通过解决表示部分接收的样本的线性方程式的不足的系统，同时使基于从相邻块或由帧接收到的帧获得的信号的模型最小化计算出的误差来确定特定丢失分组的优化的分组丢失隐藏解决方案 解码器。

公开(公告)号：US20090164657A1

公开(公告)日：2009-06-25

申请号：US11961900

申请日：2007-12-20

Applicant: Jin Li ,  Philip A. Chou ,  Minghua Chen

Inventor： Jin Li ,  Philip A. Chou ,  Minghua Chen

IPC: G06F15/173

CPC classification number: H04L65/80 ,  H04L41/0896 ,  H04L43/0864 ,  H04L43/087 ,  H04L43/0882 ,  H04L43/10 ,  H04L43/16

Abstract: A “communications rate controller” provides various techniques for maximizing a quality of real-time communications (RTC) (including audio and/or video broadcasts and conferencing) over multi-hop networks such as, for example, the Internet. Endpoints in such networks generally communicate via a segmented path that extends through one or more routers between each endpoint. Maximization of conferencing quality is generally accomplished by providing in-session bandwidth estimation across segments of the network path between endpoints (i.e., communication/conference participants) in combination with a robust non-oscillating dynamic rate control strategy for maximizing usage of available bandwidth between RTC endpoints. Further, the dynamic rate control techniques provided by the communications rate controller are designed to prevent degradation in end-to-end delay, jitter, and packet loss characteristics of the RTC.

Abstract translation: “通信速率控制器”提供了通过多跳网络（例如因特网）来最大化实时通信（RTC）（包括音频和/或视频广播和会议）的质量的各种技术。 这种网络中的端点通常通过分段路径进行通信，该路径延伸通过每个端点之间的一个或多个路由器。 会议质量的最大化通常通过在端点（即通信/会议参与者）之间的网络路径的段之间提供会话期间带宽估计，结合鲁棒的非振荡动态速率控制策略来实现，以最大化RTC之间的可用带宽的使用 端点。 此外，由通信速率控制器提供的动态速率控制技术被设计为防止RTC的端到端延迟，抖动和分组丢失特性的劣化。

公开(公告)号：US20090138618A1

公开(公告)日：2009-05-28

申请号：US11945306

申请日：2007-11-27

Applicant: Jin Li ,  Sudipta Sengupta ,  Miroslav Ponec ,  Minghua Chen ,  Philip A. Chou

Inventor： Jin Li ,  Sudipta Sengupta ,  Miroslav Ponec ,  Minghua Chen ,  Philip A. Chou

IPC: G06F15/173

CPC classification number: H04L67/104 ,  H04L65/80 ,  H04L67/1085

Abstract: Difficulties associated with choosing advantageous network routes between server and clients are mitigated by a routing system that is devised to use many routing path sets, where respective sets comprise a number of routing paths covering all of the clients, including through other clients. A server may then apportion a data stream among all of the routing path sets. The server may also detect the performance of the computer network while sending the data stream between clients, and may adjust the apportionment of the routing path sets including the route. The clients may also be configured to operate as servers of other data streams, such as in a videoconferencing session, for example, and may be configured to send detected route performance information along with the portions of the various data streams.

Abstract translation: 通过设计为使用许多路由路径集的路由系统来减轻与服务器和客户端之间选择有利的网络路由相关联的困难，其中相应的集合包括覆盖所有客户端的多个路由路径，包括通过其他客户端。 然后，服务器可以在所有路由路径集之间分配数据流。 服务器还可以在客户端之间发送数据流时检测计算机网络的性能，并且可以调整包括路由的路由路径集合的分配。 客户端还可以被配置为例如在视频会议会话中作为其他数据流的服务器操作，并且可以被配置为发送检测到的路由性能信息以及各种数据流的部分。

公开(公告)号：US07529198B2

公开(公告)日：2009-05-05

申请号：US11101121

申请日：2005-04-07

Applicant: Kamal Jain ,  Laszlo Lovasz ,  Philip A. Chou

Inventor： Kamal Jain ,  Laszlo Lovasz ,  Philip A. Chou

IPC: H04L12/28 ,  H04J3/24 ,  H04J3/00

CPC classification number: H04L45/02 ,  H04L12/2856 ,  H04L67/16

Abstract: An overlay network and scheme for building and using the overlay network are described. As the overlay network is built, new nodes joining the network are connected randomly with other nodes which results in a random graph as the network topology. The network is fully scalable, with each new node providing the same number of network connections for output to other nodes as it consumes when it joins the network. In addition, network coding is implemented at each node to mix packets of data entering each node using random linear functions. The network coding at each node generates new packets that are independent combinations of original data packets entering the node. The new coded packets make the distribution of data to other nodes more efficient and robust.

Abstract translation: 描述了用于构建和使用覆盖网络的覆盖网络和方案。 随着覆盖网络的建立，加入网络的新节点与其他节点随机连接，导致随机图形作为网络拓扑结构。 网络是完全可扩展的，每个新节点提供相同数量的网络连接，以便在连接网络时消耗其他节点。 此外，在每个节点处实现网络编码，以使用随机线性函数混合进入每个节点的数据。 每个节点的网络编码产生作为进入节点的原始数据分组的独立组合的新分组。 新的编码数据包使数据分发到其他节点更加高效和稳健。

公开(公告)号：US20090055377A1

公开(公告)日：2009-02-26

申请号：US11843129

申请日：2007-08-22

Applicant: Rajesh K. Hedge ,  Zicheng Liu ,  Li-wei He ,  Philip A. Chou ,  Christopher A. Meek

Inventor： Rajesh K. Hedge ,  Zicheng Liu ,  Li-wei He ,  Philip A. Chou ,  Christopher A. Meek

IPC: G06F7/06 ,  G06F15/16 ,  G06F17/30

CPC classification number: G06F17/30029 ,  G06F17/30053

Abstract: A media recommendation and sharing technique that employs agents on media players/devices to expand the scope of media sharing scenarios. The technique assists a user in discovering media items, such as, for example, music, recordings, play lists, pictures, video games, on nearby media players or devices (devices which are capable of receiving, storing and playing media) which are interesting to the user. The collaborative media recommendation and sharing technique contemporaneously determines a user's media preferences based on media stored on a pair of media devices and recommends media for potential sharing based on these determined user preferences.

Abstract translation: 媒体推荐和分享技术，在媒体播放器/设备上使用代理扩展媒体共享场景的范围。 该技术帮助用户发现媒体项目，例如音乐，录音，播放列表，图片，视频游戏，附近的媒体播放器或设备（能够接收，存储和播放媒体的设备），这是有趣的 给用户 合作媒体推荐和共享技术同时基于存储在一对媒体设备上的媒体同时确定用户的媒体偏好，并且基于这些确定的用户偏好推荐媒体进行潜在共享。

公开(公告)号：US20080192738A1

公开(公告)日：2008-08-14

申请号：US11675047

申请日：2007-02-14

Applicant: Dinei A. Florencio ,  Philip A. Chou ,  Suleyman Serdar Kozat

Inventor： Dinei A. Florencio ,  Philip A. Chou ,  Suleyman Serdar Kozat

IPC: H04L12/56

CPC classification number: H04L65/601 ,  H04L1/0014 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/008

Abstract: A “Media Transmission Optimizer” provides a media transmission optimization framework for lossy or bursty networks such as the Internet. This optimization framework provides a novel form of dynamic Forward Error Correction (FEC) that focuses on the perceived quality of a recovered media signal rather than on the absolute accuracy of the recovered media signal. In general, the Media Transmission Optimizer provides an encoder that optimizes the transmission of redundant frames of electronic media information encoded at different bit rates, and provides optimized playback quality by providing a decoder that automatically selects an optimal path through one or more available representations of each frame as a function of overall rate/distortion criteria.

Abstract translation: “媒体传输优化器”为诸如因特网之类的有损或突发的网络提供媒体传输优化框架。 该优化框架提供了一种新型的动态前向纠错（FEC），其侧重于恢复的媒体信号的感知质量，而不是恢复的媒体信号的绝对精度。 通常，媒体传输优化器提供了一种编码器，其优化以不同比特率编码的电子媒体信息的冗余帧的传输，并且通过提供自动选择通过每个的一个或多个可用表示的最佳路径的解码器来提供优化的播放质量 帧作为总体速率/失真标准的函数。

公开(公告)号：US07349440B1

公开(公告)日：2008-03-25

申请号：US10686952

申请日：2003-10-15

Applicant: Philip A. Chou ,  Kamal Jain

Inventor： Philip A. Chou ,  Kamal Jain

IPC: H04J3/06

CPC classification number: H04L12/18 ,  H04J3/0664

Abstract: A system and method that enables broadcasting of data in packets across a network using network coding is described. This system and method enables a network to broadcast information in packets without full knowledge of the network's topology. Further, it enables broadcasting of data in packets with a low probability of failure.

Abstract translation: 描述了一种能够使用网络编码通过网络以数据包广播数据的系统和方法。 该系统和方法使得网络能够在不完全了解网络拓扑的情况下以分组方式广播信息。 此外，它能够以低故障概率的分组广播数据。