专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明申请

WO2005071959A1 METHOD AND APPARATUS FOR PROCESSING A BITSTREAM IN A DIGITAL VIDEO TRANSCODER 审中-公开
标题翻译：在数字视频转码器中处理一个BITSTREAM的方法和装置
公开(公告)号：WO2005071959A1
公开(公告)日：2005-08-04
申请号：PCT/US2005/000595
申请日：2005-01-10
申请人： GENERAL INSTRUMENT CORPORATION , NEMIROFF, Robert, S. , WU, Siu-Wai
发明人： NEMIROFF, Robert, S. , WU, Siu-Wai
IPC分类号： H04N7/12
CPC分类号： H04N19/198 , H04N19/115 , H04N19/124 , H04N19/137 , H04N19/14 , H04N19/142 , H04N19/15 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/196 , H04N19/40 , H04N19/48 , H04N19/61
摘要： [0052] A method and apparatus for processing a bitstream in a digital video transcoder is described. In one example, an adjustment factor is determined (408) that relates a number of bits representing a selected frame defined by the bitstream to a target number of bits for the selected frame. An average spatial activity value among sets of video data is associated (410) with the selected frame. A spatial activity value for a selected set of the sets of video data is determined (414). A normalized spatial activity value for the selected set of frequency video data is then computed (416) in response to the average spatial activity value, the spatial activity value, and a function of the adjustment factor. Target bit reduction for each of the sets of video data may be computed using a function of the normalized spatial activity value and the adjustment factor.
摘要翻译：描述了一种用于处理数字视频代码转换器中的位流的方法和装置。在一个示例中，确定调整因子（408），其将表示由比特流定义的所选帧的位的数量与所选择的帧的目标位数相关联。视频数据组中的平均空间活动值与所选择的帧相关联（410）。确定所选择的视频数据组集合的空间活动值（414）。然后响应于平均空间活动值，空间活动值和调整因子的函数来计算（416）所选择的频率视频数据集合的归一化空间活动值。可以使用归一化空间活动值和调整因子的函数来计算每组视频数据的目标比特缩减。

12. 发明申请

WO2004045119A1 METHODS AND APPARATUS FOR STATISTICAL MULTIPLEXING WITH DISTRIBUTED MULTIPLEXERS 审中-公开
标题翻译：用分布式多路复用器进行统计多路复用的方法与装置
公开(公告)号：WO2004045119A1
公开(公告)日：2004-05-27
申请号：PCT/US2003/035855
申请日：2003-11-12
申请人： GENERAL INSTRUMENT CORPORATION
发明人： WU, Siu-Wai , KELLEY, Keith, J. , TRAN, Vinh
IPC分类号： H04J3/16
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 multiplexes 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。第二级复用器根据带宽请求消息分配可用带宽。第二级多路复用器然后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编码数据流。多个编码数据流在每个第一级多路复用器被多路复用以提供恒定数据速率的复用数据流。第二级复用器复用来自第一级多路复用器的多路复用数据流，以提供复用的传输流。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式