公开(公告)号：US20060251167A1

公开(公告)日：2006-11-09

申请号：US10539698

申请日：2003-12-16

申请人： Mihaela Van Der Schaar ,  Qiong Li

发明人： Mihaela Van Der Schaar ,  Qiong Li

IPC分类号： H04N7/12

CPC分类号： H04L65/4084 ,  H04L29/06 ,  H04L29/06027 ,  H04L65/80 ,  H04N21/23439 ,  H04N21/44029 ,  H04N21/44209 ,  H04N21/4621 ,  H04N21/6125 ,  H04N21/6581

摘要： A receiver-driven streaming method is provided. The method includes receiving an original coded video stream from a transmitter 102 at a receiver 104. An available bit rate is measured at the receiver 104. A request for a different coded video stream and a switching stream is sent from the receiver 104 to the transmitter 102 based on the available bit rate. The requested switching stream is received from the transmitter 102 at the receiver 104. The requested coded video stream is received from the transmitter 102 at the receiver 104. According to one embodiment, switching streams 132a-132f are stored separately from coded video streams 130a-130c, and each switching stream 132a-132f and coded video stream 130a-130c is stored in a separate track from each other. In this way, switching streams 132a-132f maybe generated offline. Also, the receiver 104 controls the streams provided by the transmitter 102 by requesting specific switching streams 132a-132f and coded video streams 130a-103c.

摘要翻译： 提供了一种接收机驱动的流传输方法。 该方法包括在接收机104处从发射机102接收原始编码视频流。在接收机104处测量可用比特率。对于不同编码视频流和切换流的请求从接收机104发送到发射机 102基于可用比特率。 所请求的切换流在接收机104处从发射机102接收。所请求的编码视频流在接收机104处从发射机102接收。根据一个实施例，切换流132a-132f与编码视频流 130a-130c，并且每个切换流132a-132f和编码视频流130a-130c彼此存储在单独的轨道中。 以这种方式，切换流132a-132f可以离线生成。 而且，接收机104通过请求特定的切换流132a-132f和编码的视频流130a-103c来控制由发射机102提供的流。

公开(公告)号：US20060165129A1

公开(公告)日：2006-07-27

申请号：US10538108

申请日：2003-12-10

申请人： Qiong Li ,  Mihaela Van Der Schaar

发明人： Qiong Li ,  Mihaela Van Der Schaar

IPC分类号： H04J3/06

CPC分类号： H04L47/2416 ,  H04L1/0014 ,  H04L1/0015 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/25 ,  H04L47/28 ,  H04L65/608 ,  H04L65/80 ,  H04N21/26216 ,  H04N21/2662 ,  H04N21/6125 ,  H04N21/6437 ,  H04N21/64769

摘要： A so-called “Virtual Clock” with varying frequency is provided for used by a multimedia streaming server to adapt its transmission rate dynamically to changing network conditions. The “Virtual Clock” system and method of the present invention compensates for a potential limitation of the Internet Real-time Transmission Protocol (RTP), that stamps every packet it delivers with a timestamp and expects the server using this timestamp to schedule the transmission of this particular packet accordingly. Consequently, the transmission rate is pre-determined by the encoded multimedia content when RPT is used. Using the “Virtual Clock” of the present invention, the streaming server has a mechanism to overcome this RTP limitation and can conduct transmission rate adaptation in a way that can balance the bandwidth requirement of the content with the bandwidth availability of the network.

摘要翻译： 提供了具有不同频率的所谓“虚拟时钟”，供多媒体流服务器使用，以便将其传输速率动态地适应不断变化的网络条件。 本发明的“虚拟时钟”系统和方法补偿因特网实时传输协议（RTP）的潜在限制，因为它以每个分组的形式对其进行标记，并且期望使用该时间戳的服务器调度传输 相应的这个特定的包。 因此，当使用RPT时，传输速率由编码的多媒体内容预先确定。 使用本发明的“虚拟时钟”，流服务器具有克服该RTP限制的机制，并且可以以能够平衡内容的带宽需求与网络的带宽可用性的方式进行传输速率适配。

公开(公告)号：US20060069793A1

公开(公告)日：2006-03-30

申请号：US10538100

申请日：2003-12-10

申请人： Qiong Li ,  Mihaela Van Der Schaar

发明人： Qiong Li ,  Mihaela Van Der Schaar

IPC分类号： G06F15/16

CPC分类号： H04N1/48 ,  G01J3/46 ,  G01J3/465 ,  G01J3/501 ,  G01J3/51 ,  G01J2003/467 ,  H04L65/80 ,  H04L69/10 ,  H04L69/28 ,  H04L69/40

摘要： A circular buffer, i.e., a chain of buffers forming a circle, is provided for managing packet loss detection in Internet streaming. The detection latency is determined by the size of the buffer chain, which can be dynamically adapted to network conditions and application requirements. The present invention can achieve reasonable detection accuracy.

摘要翻译： 提供循环缓冲器，即形成圆的缓冲器链，用于管理因特网流中的分组丢失检测。 检测延迟由缓冲链的大小确定，缓冲链可以动态地适应网络条件和应用需求。 本发明可以实现合理的检测精度。

公开(公告)号：US20060005101A1

公开(公告)日：2006-01-05

申请号：US10531601

申请日：2003-09-19

申请人： Qiong Li ,  Mihaela Van Der Schaar ,  Richard Chen

发明人： Qiong Li ,  Mihaela Van Der Schaar ,  Richard Chen

IPC分类号： H03M13/00

CPC分类号： H04L65/608 ,  H03M13/35 ,  H04L1/0009 ,  H04L1/0022 ,  H04L1/004 ,  H04L1/1812 ,  H04L29/06027 ,  H04L65/607 ,  H04L65/80 ,  H04L69/18 ,  H04L69/40

摘要： A system and method provides a realistic architecture and specifies the protocols that are necessary for carrying out adaptive and efficient protection, thereby allowing applications to dynamically switch between different protection strategies. Protection is uniquely achieved by providing the protection track (206, 208, 210) as a separate stream from the media data stream (202, 204). In this manner, changing the protection data can change the protection level or strategy, but the protection procedures remain the same. Further, the method uses Real-time Transport protocol (RTSP) instead of Internet Group Management protocol (IGMP) which can achieve faster protection and provide more flexibility to applications.

摘要翻译： 系统和方法提供了一个现实的架构，并指定了执行自适应和高效保护所必需的协议，从而允许应用程序在不同的保护策略之间动态切换。 通过将保护轨道（206,208,210）提供为与媒体数据流（202,204）不同的流来唯一地实现保护。 以这种方式，更改保护数据可以改变保护等级或策略，但是保护过程保持不变。 此外，该方法使用实时传输协议（RTSP）而不是互联网组管理协议（IGMP），其可以实现更快的保护并为应用提供更多的灵活性。

公开(公告)号：US20050275752A1

公开(公告)日：2005-12-15

申请号：US10531617

申请日：2003-09-19

申请人： Qiong Li ,  Mihaela Van Der Schaar

发明人： Qiong Li ,  Mihaela Van Der Schaar

IPC分类号： H04N7/12 ,  H04N7/173 ,  H04N7/24 ,  H04N9/74 ,  H04N11/02 ,  H04N11/04 ,  H04N7/16

CPC分类号： H04N21/2381 ,  H04N7/17318 ,  H04N21/234327 ,  H04N21/23805 ,  H04N21/2402 ,  H04N21/2662 ,  H04N21/4363 ,  H04N21/4381 ,  H04N21/6338 ,  H04N21/64322 ,  H04N21/6437

摘要： A system and method is provided to facilitate the transmission of scalable coded video over IP networks. A proposed pre-processing method is disclosed, referred to as multi-track hinting, efficiently structures layered video into a flexible format so that it can be easily streamed over packet-switching networks in accordance with changing network conditions, complexity constraints and user preferences. A general purpose MPEG server, without major modification, is capable of automatically using multiple channels (i.e., RTP connections), thereby providing the streaming system the flexibility to adapt to changing network conditions, complexity constraints and user preferences by adjusting the number of scalable layers to be transmitted. Accordingly, the multi-track hinting method extends the functions of standard Internet streaming protocols (RTSP, SDP) to enable flexible adaptation.

摘要翻译： 提供了一种系统和方法，以便于通过IP网络传输可伸缩编码视频。 公开了一种被称为多轨提示的预处理方法，其将分层视频有效地结构化成灵活的格式，使得可以根据变化的网络条件，复杂性约束和用户偏好容易地在分组交换网络上流式传输。 无需主要修改的通用MPEG服务器能够自动使用多个通道（即RTP连接），从而通过调整可伸缩层数来提供流系统灵活性，以适应不断变化的网络条件，复杂性约束和用户偏好 被传送。 因此，多轨提示方法扩展了标准互联网流协议（RTSP，SDP）的功能，以实现灵活的适配。

公开(公告)号：US07480252B2

公开(公告)日：2009-01-20

申请号：US10264906

申请日：2002-10-04

申请人： Mihaela Van Der Schaar

发明人： Mihaela Van Der Schaar

IPC分类号： H04J1/16 ,  H04N7/26

CPC分类号： H04N19/34 ,  H04N19/132 ,  H04N19/164 ,  H04N19/17 ,  H04N19/187 ,  H04N19/39 ,  H04N19/61

摘要： A method, system and apparatus for improving network transmission efficiency using MDS and Fine Granular Spatial coding is disclosed. In accordance with the method, a video image is partitioned into a plurality of information item frames, each frame is independently layer encoded into a base layer and an enhancement layer, at least one channel of the communication is then selected, each of the base layers are associated with one of the selected communication channels, and each base layer is transmitted over the associated communication channel. In other aspect, a residual bandwidth is determined on each associated channel and a level of an associated enhancement layer comparable to the residual bandwidth is transmitted over the associated channel.

摘要翻译： 公开了一种使用MDS和精细粒度空间编码来提高网络传输效率的方法，系统和装置。 根据该方法，将视频图像划分为多个信息项目帧，每个帧独立地被层编码为基本层和增强层，然后选择通信的至少一个信道，每个基本层 与所选择的通信信道之一相关联，并且通过相关联的通信信道发送每个基本层。 在另一方面，在每个相关联的信道上确定剩余带宽，并且通过相关联的信道发送与剩余带宽相当的相关联的增强层的级别。

公开(公告)号：US07245663B2

公开(公告)日：2007-07-17

申请号：US09887747

申请日：2001-06-21

申请人： Mihaela Van Der Schaar ,  Hayder Radha

发明人： Mihaela Van Der Schaar ,  Hayder Radha

IPC分类号： H04N7/12

CPC分类号： H04N19/34 ,  H04N19/17 ,  H04N19/176 ,  H04N19/196 ,  H04N19/197 ,  H04N19/61

摘要： Improved efficiency in transmission of FGS encoded video data is achieved by reducing the transmission of overhead information items necessary to decode the received video data. After establishing an initial or first set of criteria for selectively enhancing areas within an image, each subsequent transmission frame includes an indicator that informs a receiving system to decode the current frame using the previously established criteria. The initial criteria include shift factor values specifying selectively enhanced areas of an image; position, displacement vector, size and enhancement factor for at least one area of interest with in an image; and known fixed values contained at both the transmitting and receiving systems.

摘要翻译： 通过减少对接收的视频数据进行解码所需的开销信息项的传输，可以提高FGS编码视频数据的传输效率。 在建立用于选择性地增强图像中的区域的初始或第一组标准之后，每个后续传输帧包括使用先前建立的标准通知接收系统解码当前帧的指示符。 初始标准包括指定图像的选择性增强区域的移位因子值; 在图像中的至少一个感兴趣区域的位置，位移矢量，大小和增强因子; 以及包含在发射和接收系统中的已知固定值。

公开(公告)号：US06826232B2

公开(公告)日：2004-11-30

申请号：US09467589

申请日：1999-12-20

申请人： Yingwei Chen ,  Hayder Radha ,  Mihaela Van Der Schaar

发明人： Yingwei Chen ,  Hayder Radha ,  Mihaela Van Der Schaar

IPC分类号： H04N718

CPC分类号： H04N19/34 ,  H04N19/129 ,  H04N19/14 ,  H04N19/176

摘要： The present invention is directed to a method for encoding video data in an embedded fashion in order to achieve fine granular scalable video. The method includes the video data being transformed into a plurality of DCT coefficients. Further, the DCT coefficients are arranged into sub-groups and the DCT coefficients are scanned according to the sub-groups. The DCT coefficients being scanned by the sub-groups enables a higher level of scalability to be achieved.

摘要翻译： 本发明涉及一种用于以嵌入方式对视频数据进行编码的方法，以便实现细粒度可缩放视频。 该方法包括将视频数据变换为多个DCT系数。 此外，DCT系数被布置成子组，并且根据子组扫描DCT系数。 由子组扫描的DCT系数能够实现更高级别的可扩展性。

公开(公告)号：US06480547B1

公开(公告)日：2002-11-12

申请号：US09419672

申请日：1999-10-15

申请人： Yingwei Chen ,  Mihaela Van Der Schaar ,  Hayder Radha

发明人： Yingwei Chen ,  Mihaela Van Der Schaar ,  Hayder Radha

IPC分类号： H04N712

CPC分类号： H04N19/34 ,  H04N19/13 ,  H04N19/29 ,  H04N19/61 ,  H04N19/63

摘要： There is disclosed a video encoder and a video decoder. The video encoder comprises base layer circuitry for receiving an input stream of video frames and generating compressed base layer video data for transmission to a streaming video receiver. The base layer video data comprises original transform coefficients (O) associated with the input stream of video frames and reconstructed base layer transform coefficients (B) associated with the original transform coefficients. The video encoder also comprises enhancement layer circuitry for receiving the original transform coefficients (O) and the reconstructed base layer transform coefficients (B) and generating a residual signal (R) proportional to a difference between the original transform coefficients (O) and the reconstructed base layer transform coefficients (B). The enhancement layer circuitry encodes and sends to the streaming video receiver a sign of the residual signal (R) and the bit planes of the residual signal (R). The video decoder comprises base layer circuitry for receiving compressed base layer video data and determining reconstructed base layer transform coefficients (B) associated with a quantization of the base layer video data. The video decoder further comprises enhancement layer circuitry for receiving enhancement layer video data associated with the compressed base layer video data and determining a residual signal (R) and a sign associated with the residual signal (R). The enhancement layer circuitry reconstructs enhancement layer transform coefficients (E) from the residual signal (R) and the plurality of reconstructed base layer transform coefficients (B).

摘要翻译： 公开了一种视频编码器和视频解码器。 视频编码器包括用于接收视频帧的输入流并生成用于传输到流式视频接收机的压缩基本层视频数据的基本层电路。 基层视频数据包括与视频帧的输入流相关联的原始变换系数（O）和与原始变换系数相关联的重建的基本层变换系数（B）。 视频编码器还包括用于接收原始变换系数（O）和重构的基本层变换系数（B）的增强层电路，并产生与原始变换系数（O）和重建的变换系数（O）之间的差成比例的残差信号 基层变换系数（B）。 增强层电路对流视频接收机编码残留信号（R）的符号和残留信号（R）的位平面。 视频解码器包括用于接收压缩的基本层视频数据和确定与基本层视频数据的量化相关联的重建的基本层变换系数（B）的基本层电路。 视频解码器还包括增强层电路，用于接收与压缩的基本层视频数据相关联的增强层视频数据，并确定残余信号（R）和与残留信号（R）相关联的符号。 增强层电路从剩余信号（R）和多个重建的基本层变换系数（B）重建增强层变换系数（E）。

公开(公告)号：US20100033622A1

公开(公告)日：2010-02-11

申请号：US10594022

申请日：2005-03-23

申请人： Erwin Bellers ,  Mihaela Van Der Schaar

发明人： Erwin Bellers ,  Mihaela Van Der Schaar

IPC分类号： H04N7/01 ,  H04N7/26

CPC分类号： H04N19/39 ,  H04N19/174

摘要： Multiple Description Coding (MDC) has been shown to be an effective technique for robust transmission of video data over networks including wireless systems and the Internet. A method is provided where the video signal (20) is interlaced and split into multiple streams before being encoded and transmitted over separate transmission channels (308, 310). At a receiver (320) side, de-interlacing algorithms may be applied and the streams are regrouped to form the original video signal (20). The use of interlacing and deinterlacing techniques improve the robustness of video transmission without having to modify existing equipment.

摘要翻译： 多描述编码（MDC）已经被证明是用于通过包括无线系统和因特网在内的网络强大地传输视频数据的有效技术。 提供了一种方法，其中视频信号（20）在被编码之前被隔行扫描并分离成多个流，并通过单独的传输信道（308,310）传输。 在接收机（320）侧，可以应用去隔行算法，并且重新分组流以形成原始视频信号（20）。 使用交错和去隔行扫描技术可以提高视频传输的鲁棒性，而无需修改现有的设备。