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    Method and apparatus for immediate display of multicast IPTV over a bandwidth constrained network
    9.
    发明授权
    Method and apparatus for immediate display of multicast IPTV over a bandwidth constrained network 有权
    用于在带宽受限网络上立即显示多播IPTV的方法和装置

    公开(公告)号：US08462847B2

    公开(公告)日：2013-06-11

    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： H04N7/12

    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。

    VIDEO INSERTION INFORMATION INSERTION IN A COMPRESSED BITSTREAM
    10.
    发明申请
    VIDEO INSERTION INFORMATION INSERTION IN A COMPRESSED BITSTREAM 有权
    压缩的BITSTREAM中的视频插入信息插入

    公开(公告)号：US20090232221A1

    公开(公告)日：2009-09-17

    申请号：US12047996

    申请日：2008-03-13

    申请人： Gary Fujen Cheng ,  Wen-Hsiung Chen ,  Michael Pereira

    发明人： Gary Fujen Cheng ,  Wen-Hsiung Chen ,  Michael Pereira

    IPC分类号： H04N11/02

    CPC分类号： H04N19/48 ,  G06Q30/02 ,  H04N21/2343 ,  H04N21/235 ,  H04N21/435

    摘要： Particular embodiments generally relate to video insertion information insertion in a compressed bitstream. In one embodiment, a compressed bitstream of data is received. Video insertion information to be added to the bitstream is then determined. One or more macroblocks out of a plurality of macroblocks are determined in the compressed bitstream. The macroblocks are determined in the compressed domain and not the spatial domain. Information is selectively inserted for the video insertion information for the determined one or more macroblocks in the compressed bitstream. For example, encoded macroblocks for the video insertion information may replace the determined one or more macroblocks. Also, the one or more macroblocks may be decoded and information for the video insertion information is added to the decoded one or more macroblocks, and then the one or more macroblocks are re-encoded with the information. The re-encoded macroblocks may then replace the determined one or more macroblocks in the compressed bitstream.

    摘要翻译： 具体实施例通常涉及在压缩比特流中插入视频插入信息。 在一个实施例中，接收压缩的数据比特流。 然后确定要添加到比特流的视频插入信息。 在压缩比特流中确定多个宏块中的一个或多个宏块。 在压缩域中确定宏块，而不是空间域。 针对所确定的压缩比特流中的一个或多个宏块的视频插入信息选择性地插入信息。 例如，用于视频插入信息的编码宏块可以替代所确定的一个或多个宏块。 此外，一个或多个宏块可以被解码，并且用于视频插入信息的信息被添加到解码的一个或多个宏块，然后一个或多个宏块被重新编码。 再编码的宏块然后可以替换所确定的压缩比特流中的一个或多个宏块。