公开(公告)号：US06434195B1

公开(公告)日：2002-08-13

申请号：US09196709

申请日：1998-11-20

申请人： Ajay Luthra ,  Keith J. Kelley ,  Limin Wang

发明人： Ajay Luthra ,  Keith J. Kelley ,  Limin Wang

IPC分类号： H04N712

CPC分类号： H04N21/812 ,  H04N19/00 ,  H04N19/107 ,  H04N19/157 ,  H04N19/172 ,  H04N19/174 ,  H04N19/40 ,  H04N19/48 ,  H04N19/61 ,  H04N21/23424 ,  H04N21/2343 ,  H04N21/26233 ,  H04N21/44016 ,  H04N21/8455

摘要： A method is provided for replacing compressed video from a first source with video from a second source at a predefined insertion point in a video data stream. If the video from the second source is progressively refreshed video, it is decompressed sufficiently prior to the insertion point to enable the recovery and recompression of a first video frame (in encoding order) from the second source to be inserted at the insertion point. The recovered first video frame is then recompressed as an intra-coded (I) frame. The insertion of the video from the second source is then commenced at the insertion point using the I frame. The insertion point can, for example, indicate the commencement of a commercial break in the video stream, in which case the second source provides a commercial for insertion into the commercial break. Where the commercial is stored in memory, it can be stored with the first frame thereof (in encoding order) as an I frame.

摘要翻译： 提供了一种用于在视频数据流中的预定插入点处从来自第二源的视频替换来自第一源的压缩视频的方法。 如果来自第二源的视频是逐渐刷新的视频，则在插入点之前对其进行充分的解压缩，以便能够从插入点插入第二个源的第一个视频帧（以编码顺序）的恢复和重新压缩。 然后将恢复的第一视频帧作为帧内编码（I）帧重新压缩。 然后使用I帧在插入点处开始从第二源插入视频。 例如，插入点可以指示视频流中的商业中断的开始，在这种情况下，第二个源提供商业插入到商业中断。 在商业存储在存储器中的情况下，可以将其第一帧（以编码顺序）存储为I帧。

公开(公告)号：US07266133B2

公开(公告)日：2007-09-04

申请号：US10696927

申请日：2003-10-30

申请人： Siu-Wai Wu ,  Keith J. Kelley ,  Vinh Tran

发明人： Siu-Wai Wu ,  Keith J. Kelley ,  Vinh Tran

IPC分类号： H04J3/02 ,  H04N7/173

CPC分类号： H04N21/2385 ,  H04J3/1688 ,  H04N21/2365 ,  H04N21/23655 ,  H04N21/4347 ,  H04N21/6377 ,  H04N21/658

摘要： The present invention provides methods and apparatus for statistical multiplexing of a large number of data streams. A plurality of encoders are associated with each first stage multiplexer. Bandwidth allocation among all encoders is controlled by a second stage multiplexer. A bandwidth request message is communicated from each the encoders to the second stage multiplexer. The second stage multiplexer allocates available bandwidth based on the bandwidth request messages. The second stage multiplexer then communicates an allocated bandwidth message to each encoder. Each encoder encodes a data stream in accordance with its allocated bandwidth to provide an encoded data stream. A plurality of the encoded data streams are multiplexed at each first stage multiplexer to provide a multiplexed data stream at a constant data rate. The second stage multiplexer mutiplexes the multiplexed data streams from the first stage multiplexers to provide a multiplexed transport stream.

摘要翻译： 本发明提供了用于大量数据流的统计复用的方法和装置。 多个编码器与每个第一级多路复用器相关联。 所有编码器之间的带宽分配由第二级多路复用器控制。 带宽请求消息从每个编码器传送到第二级多路复用器。 第二级复用器基于带宽请求消息分配可用带宽。 然后第二级多路复用器将分配的带宽消息传送到每个编码器。 每个编码器根据其分配的带宽对数据流进行编码以提供经编码的数据流。 多个编码数据流在每个第一级多路复用器被多路复用，以一恒定的数据速率提供复用的数据流。 第二级多路复用器将来自第一级多路复用器的多路复用数据流多路复用，以提供复用的传输流。