公开(公告)号：WO2010132210A1

公开(公告)日：2010-11-18

申请号：PCT/US2010/032902

申请日：2010-04-29

申请人： ALCATEL-LUCENT USA INC. ,  HAIMI-COHEN, Raziel ,  HEARN, John, P.

发明人： HAIMI-COHEN, Raziel ,  HEARN, John, P.

IPC分类号： H04L12/18 ,  H04N7/173 ,  H04L29/06

CPC分类号： H04L12/185 ,  H04L65/1083 ,  H04L65/4076 ,  H04N7/17336 ,  H04N21/23424 ,  H04N21/4384 ,  H04N21/44016 ,  H04N21/6125 ,  H04N21/6405

摘要： in an internet protocol television (IPTV) system, fast channel change (FCC) transactions that experience late multicast joins are handled specially, thereby allowing the system to be provisioned for the vast majority of multicast joins that are within an expected range. During an FCC transaction, the subscriber interface device, such as a set-top box. (STB), can determine how iong it can wait to join the multicast stream of the new channel before a gap can be predicted to occur in the handover from the FCC υnicast to the multicast. If the STB has not joined the multicast stream by the determined time, a recovery procedure is invoked in which rhe STB sends a RESTART request to the FCC server which, in tym, increases the rate of the FCC unicast as i f the FCC transaction were restarted, thus allowing the handover to occur seamlessly. This solution reduces the demands of each FCC transaction, allowing for greater scalability and reduced cost.

摘要翻译： 在互联网协议电视（IPTV）系统中，特别处理经历较晚组播连接的快速通道改变（FCC）事务，从而允许为绝大多数在预期范围内的多播联接提供系统。 在FCC事务期间，用户接口设备，例如机顶盒。 （STB），可以确定在可以预测在从FCC点播到多播的切换中发生间隙之前，它可以等待加入新信道的多播流。 如果机顶盒尚未在确定的时间内加入多播流，则调用恢复过程，在该恢复过程中，其中rhe STB向FCC服务器发送RESTART请求，该服务器在tym中增加了FCC单播的速率，就像FCC事务重新启动一样 ，从而允许切换无缝地发生。 该解决方案可减少每个FCC事务的需求，从而实现更大的可扩展性和降低成本。

公开(公告)号：WO2008088673A3

公开(公告)日：2008-09-18

申请号：PCT/US2008000079

申请日：2008-01-04

申请人： LUCENT TECHNOLOGIES INC ,  BOSCH PETER ,  GUO KATHERINE H ,  HEARN JOHN P ,  NARLIKAR GIRIJA J

发明人： BOSCH PETER ,  GUO KATHERINE H ,  HEARN JOHN P ,  NARLIKAR GIRIJA J

IPC分类号： H04N7/24 ,  H04J99/00

CPC分类号： H04N21/6405 ,  H04N21/2221 ,  H04N21/234327 ,  H04N21/41407 ,  H04N21/64792 ,  H04N21/6583

摘要： The present invention provides a method of multicasting video streams. The method includes accessing, at a base station, a first packet from a video stream that includes a plurality of packets, Each packet in the video stream is assigned to either a base layer or at least one enhancement layer. The method also includes encoding the first packet using a coding scheme selected based on whether the first packet is assigned to the base layer or an enhancement layer.

摘要翻译： 本发明提供了一种多播视频流的方法。 该方法包括在基站处从包括多个分组的视频流中访问第一分组。视频流中的每个分组被分配给基础层或至少一个增强层。 该方法还包括使用基于第一分组是被分配给基础层还是增强层而选择的编码方案来编码第一分组。

公开(公告)号：WO2008088673A2

公开(公告)日：2008-07-24

申请号：PCT/US2008/000079

申请日：2008-01-04

申请人： LUCENT TECHNOLOGIES INC. ,  BOSCH, Peter ,  GUO, Katherine, H. ,  HEARN, John, P. ,  NARLIKAR, Girija, J.

发明人： BOSCH, Peter ,  GUO, Katherine, H. ,  HEARN, John, P. ,  NARLIKAR, Girija, J.

IPC分类号： H04N7/24

CPC分类号： H04N21/6405 ,  H04N21/2221 ,  H04N21/234327 ,  H04N21/41407 ,  H04N21/64792 ,  H04N21/6583

摘要： The present invention provides a method of multicasting video streams. The method includes accessing, at a base station, a first packet from a video stream that includes a plurality of packets, Each packet in the video stream is assigned to either a base layer or at least one enhancement layer. The method also includes encoding the first packet using a coding scheme selected based on whether the first packet is assigned to the base layer or an enhancement layer.

摘要翻译： 本发明提供了一种组播视频流的方法。 该方法包括在基站处从包括多个分组的视频流中访问第一分组。视频流中的每个分组被分配给基本层或至少一个增强层。 该方法还包括使用基于第一分组是否被分配给基本层或增强层选择的编码方案对第一分组进行编码。