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1. 发明申请

WO2009141011A1 CONTENT ADAPTIVE VIDEO ENCODER AND CODING METHOD 审中-公开
标题翻译：内容自适应视频编码器和编码方法
公开(公告)号：WO2009141011A1
公开(公告)日：2009-11-26
申请号：PCT/EP2008/056335
申请日：2008-05-22
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ) , AMMU, Satya Ghosh , BOCK, Alois Martin , SPICER, Ryan
发明人： AMMU, Satya Ghosh , BOCK, Alois Martin , SPICER, Ryan
IPC分类号： H04N7/26 , H04N7/50
CPC分类号： H04N19/006 , H04N19/114 , H04N19/137 , H04N19/142 , H04N19/172 , H04N19/177 , H04N19/53 , H04N19/61 , H04N19/87
摘要： A method of pre-processing a sequence of video picture data comprising I pictures, P pictures and B pictures, where the pictures are arranged as a plurality of Group Of Pictures (GOP) and each of the Group Of Pictures has a first picture and a plurality of Sub Group of Pictures (Sub-GOP). The method uses an analysis of the sequence of video picture data to determine a position of a scene change relative to a position of a start of a new GOP within the sequence of video picture data and then moves the start of the new GOP to coincide with the scene change by extending or decreasing a current GOP length according to whether the scene change and the start of a new GOP are within a predetermined number of pictures of each other. An apparatus for carrying out the method is also provided.
摘要翻译：一种预处理包括I图像，P图像和B图像的视频图像数据序列的方法，其中图像被排列为多个图像组（GOP），并且图像组中的每一个具有第一图像和多个子图像组（Sub-GOP）。该方法使用视频图像数据序列的分析来确定相对于视频图像数据序列内的新GOP的开始位置的场景变化的位置，然后移动新GOP的开始以与通过根据场景变化和新GOP的开始是否在预定数量的照片内延伸或减小当前GOP长度来进行场景变化。还提供了一种用于执行该方法的装置。

2. 发明申请

WO2009056978A2 PICTURE ADAPTIVE FRAME OR FIELD (PAFF) CODING FOR MPEG2 审中-公开
标题翻译：用于MPEG2的PICTURE自适应帧或场（PAFF）编码
公开(公告)号：WO2009056978A2
公开(公告)日：2009-05-07
申请号：PCT/IB2008/003158
申请日：2008-11-04
申请人： TANDBERG TELEVISION ASA , AMMU, Satya, Ghosh , SPICER, Ryan
发明人： AMMU, Satya, Ghosh , SPICER, Ryan
IPC分类号： H04N7/26 , H04N7/50
CPC分类号： H04N19/112 , H04N19/137 , H04N19/139 , H04N19/14 , H04N19/142 , H04N19/172 , H04N19/61
摘要： A video picture encoder and method arranged to use a field mode or a frame mode to encode a video picture 10. The encoder comprises: means for determining a ratio of a frame activity to a field activity of the picture; selection means arranged to select the field mode if the ratio is less than or equal to a predetermined lower threshold value and to select a frame mode if the ratio is equal to or greater than a predetermined upper threshold value. Computation means are arranged to.compute a temporal displacement and a temporal distortion of the picture if the ratio falls outside the range of lower threshold value to higher threshold value. In that case, the field mode is selected if the temporal displacement is greater than a predetermined temporal displacement threshold or the temporal distortion is greater than a temporal distortion threshold but otherwise the frame mode is selected.
摘要翻译：视频图像编码器和方法被设置为使用场模式或帧模式来对视频图像进行编码。编码器包括：用于确定帧活动与场活动的比率的装置，图片; 选择装置，如果该比率小于或等于预定的下限阈值，则选择场模式;以及如果该比率等于或大于预定的上阈值，则选择帧模式。计算装置被设置成如果该比率落在低阈值到高阈值的范围之外则计算图片的时间位移和时间失真。在那种情况下，如果时间位移大于预定时间位移阈值或者时间失真大于时间失真阈值，则选择场模式，否则选择帧模式。

3. 发明申请

WO2012025139A1 IMPROVED PROGRAM CLOCK REFERENCE INSERTION 审中-公开
标题翻译：改进的程序时钟参考插入
公开(公告)号：WO2012025139A1
公开(公告)日：2012-03-01
申请号：PCT/EP2010/062253
申请日：2010-08-23
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , MARKS, Ian , SPICER, Ryan
发明人： MARKS, Ian , SPICER, Ryan
IPC分类号： H04N7/24
CPC分类号： H04N21/4302 , H04L7/0008 , H04L43/08 , H04N19/68 , H04N21/236 , H04N21/242 , H04N21/434 , H04N21/8547
摘要： There is provided a method for clock reference insertion during packetization of an encoded data stream, wherein said packetization is performed before buffering of the data stream. The method comprises storing the value of each bit rate applied during encoding, and the duration of time for which each bit rate is applied. A clock reference time interval is converted into a clock reference data interval using the value of each bit rate applied and the duration of time for which each bit rate is applied. The clock reference data interval is used to determine where to insert a clock reference into the data stream during packetization.
摘要翻译：提供了一种用于在编码数据流的分组化期间插入时钟参考的方法，其中在缓冲数据流之前执行所述分组化。该方法包括存储在编码期间应用的每个比特率的值以及应用每个比特率的持续时间。使用施加的每个比特率的值和应用每个比特率的持续时间将时钟参考时间间隔转换成时钟参考数据间隔。时钟参考数据间隔用于确定在分组期间将时钟参考插入数据流的位置。

4. 发明申请

WO2009016159A1 SCENE CUT DETECTION FOR VIDEO STREAM COMPRESSION 审中-公开
标题翻译：用于视频流压缩的场景切割检测
公开(公告)号：WO2009016159A1
公开(公告)日：2009-02-05
申请号：PCT/EP2008/059891
申请日：2008-07-28
申请人： Tandberg Television ASA , BOCK, Alois Martin , SPICER, Ryan , WANG, Zhicheng Lancelot
发明人： BOCK, Alois Martin , SPICER, Ryan , WANG, Zhicheng Lancelot
IPC分类号： H04N7/26
CPC分类号： H04N5/147 , H04N19/107 , H04N19/114 , H04N19/124 , H04N19/142 , H04N19/179 , H04N19/87
摘要： A method and apparatus for detecting (51) in a video stream a scene cut (11, 12) between a current field of the video stream and an immediately preceding field includes determining (61) differences for a first plurality of image parameters between values of the image parameters for a current field and for one or more immediately preceding fields. A flag value is set (62) for each parameter indicating whether a possible scene break exists between the current field and the immediately preceding field dependent on the respective differences. The flag values for each parameter are combined (63) to form a combined parameter and a scene break trigger signal generated (64) indicating a scene break between the current field and the immediately preceding field if the combined parameter exceeds a predetermined trigger threshold. A change of criticality is determined (52) at a forthcoming scene cut. A quantisation parameter is adjusted (53) dependent on the criticality change to avoid overflowing a buffer on encoding of a field following the scene cut as an intra-coded field. A field following the scene cut is encoded (54) as an intra-coded field having a quantisation parameter dependent on the criticality change; such that encoding of forward or backward coded fields prior to or following the scene change is based only on fields preceding or following the scene change, respectively.
摘要翻译：一种用于在视频流中检测（51）在视频流的当前场和紧邻的前一场之间的场景切割（11,12）的方法和装置包括：确定（61）第一多个图像参数在用于当前字段和一个或多个紧邻的字段的图像参数。对于每个参数设置标志值（62），该参数指示当前字段和紧接在前一个字段之间是否存在可能的场景中断，这取决于各自的差异。如果组合参数超过预定的触发阈值，则组合每个参数的标志值（63）以形成组合参数和生成的场景中断触发信号（64），指示当前字段与紧接在前的字段之间的场景中断。在即将到来的场景切割中确定关键性的变化（52）。调整量化参数（53），取决于临界变化，以避免在作为帧内编码场的场景切割后的场编码时溢出缓冲区。场景切割后的场被编码（54）作为具有取决于临界变化的量化参数的帧内编码场; 使得在场景改变之前或之后的前向或后向编码场的编码分别仅基于场景改变之前或之后的场。

5. 发明申请

WO2010118780A1 METHOD AND APPARATUS FOR RATE DISTORTION OPTIMISATION 审中-公开
标题翻译：用于速率失真优化的方法和装置
公开(公告)号：WO2010118780A1
公开(公告)日：2010-10-21
申请号：PCT/EP2009/054596
申请日：2009-04-17
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , SPICER, Ryan , BOCK, Alois Martin
发明人： SPICER, Ryan , BOCK, Alois Martin
IPC分类号： H04N7/26 , H04N7/50
CPC分类号： H04N19/192 , H04N19/103 , H04N19/124 , H04N19/13 , H04N19/147 , H04N19/176 , H04N19/19 , H04N19/436
摘要： There is provided a method of Rate Distortion Optimisation in digital video coding, comprising determining a mean square error and bit cost for a plurality of QP points for each macroblock coding mode option under consideration, and selecting a best macroblock coding mode option dependent upon an interpolation of the plurality of QP points for each macroblock coding mode option under consideration. There is also provided a Rate Distortion Optimisation apparatus for carrying out the method, and a computer readable medium carrying instructions to carry out the method.
摘要翻译：提供了一种数字视频编码中的速率失真优化方法，其中包括针对所考虑的每个宏块编码模式选项确定多个QP点的均方误差和位成本，以及根据插值选择最佳宏块编码模式选项对于所考虑的每个宏块编码模式选项的多个QP点。还提供了一种用于执行该方法的速率失真优化装置，以及携带执行该方法的指令的计算机可读介质。

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