公开(公告)号：US10349048B2

公开(公告)日：2019-07-09

申请号：US14351483

申请日：2011-10-11

申请人： Martin Pettersson ,  Savvas Argyropoulos ,  David Lindegren ,  Peter List

发明人： Martin Pettersson ,  Savvas Argyropoulos ,  David Lindegren ,  Peter List

IPC分类号： H04N17/00 ,  H04N5/14 ,  H04N5/93

摘要： There are provided a plurality of methods for detecting a scene change in a streamed video, the streamed video comprising a series of pictures. An example method comprises calculating, for a plurality of positions, a difference between the costs of coding macro-blocks at the same position in successive pictures. The method further comprises identifying a new scene when the sum of the differences for a plurality of positions meets a threshold criterion. There is further provided a method of determining the perceptual impact of a packet loss on a streamed video the method comprising: identifying a packet loss; and determining if the lost packet contained information relating to a picture at the start of a new scene, wherein a new scene is detected using one of the methods disclosed herein.

公开(公告)号：US20150042752A1

公开(公告)日：2015-02-12

申请号：US14349054

申请日：2012-03-29

申请人： Martin Pettersson ,  Usman Hakeem

发明人： Martin Pettersson ,  Usman Hakeem

IPC分类号： H04N13/00

CPC分类号： H04N13/106 ,  H04N13/144 ,  H04N13/15 ,  H04N13/194 ,  H04N2213/002

摘要： There is provided a method of determining the quality of a three dimensional (3D) video stream, wherein the 3D video comprises at least one 3D view composition, each 3D view composition defining a plurality of two dimensional (2D) views. The method comprises determining a characteristic of each of a plurality of 2D views. The method further comprises calculating a variation in the characteristic, the variation calculated between the 2D views corresponding to the same 3D view composition. The method further still comprises calculating a quality score for the 3D video sequence, the quality score based upon the calculated variation.

摘要翻译： 提供了一种确定三维（3D）视频流的质量的方法，其中3D视频包括至少一个3D视图组合，每个3D视图组合物定义多个二维（2D）视图。 该方法包括确定多个2D视图中的每一个的特征。 该方法还包括计算特征的变化，在对应于相同3D视图组合的2D视图之间计算的变化。 该方法还包括计算3D视频序列的质量得分，基于计算出的变化的质量得分。

公开(公告)号：US20140376886A1

公开(公告)日：2014-12-25

申请号：US14351483

申请日：2011-10-11

申请人： Martin Pettersson ,  Savvas Argyropoulos ,  David Lindegren ,  Peter List

发明人： Martin Pettersson ,  Savvas Argyropoulos ,  David Lindegren ,  Peter List

IPC分类号： H04N17/00 ,  H04N5/93

CPC分类号： H04N17/004 ,  H04N5/147 ,  H04N5/93

摘要： There are provided a plurality of methods for detecting a scene change in a streamed video, the streamed video comprising a series of pictures. An example method comprises calculating, for a plurality of positions, a difference between the costs of coding macro-blocks at the same position in successive pictures. The method further comprises identifying a new scene when the sum of the differences for a plurality of positions meets a threshold criterion. There is further provided a method of determining the perceptual impact of a packet loss on a streamed video the method comprising: identifying a packet loss; and determining if the lost packet contained information relating to a picture at the start of a new scene, wherein a new scene is detected using one of the methods disclosed herein.

摘要翻译： 提供了用于检测流式视频中的场景变化的多种方法，该流式视频包括一系列图片。 对于多个位置，示例性方法包括在连续图像中的相同位置处编码宏块的成本之间的差异。 该方法还包括当多个位置的差值之和满足阈值标准时识别新场景。 还提供了一种确定分组丢失对流式视频的感知影响的方法，该方法包括：识别分组丢失; 以及确定丢失分组是否包含与新场景开始时的图片相关的信息，其中使用本文公开的方法之一来检测新场景。

公开(公告)号：US20140294362A1

公开(公告)日：2014-10-02

申请号：US14363607

申请日：2011-12-09

申请人： Martin Pettersson ,  Savvas Argyropoulos

发明人： Martin Pettersson ,  Savvas Argyropoulos

IPC分类号： H04N7/64

CPC分类号： H04N19/85 ,  H04N17/004 ,  H04N19/89 ,  H04N21/44008

摘要： There is provided an apparatus for detecting a quality defect in a video sequence, the apparatus comprising: a receiver arranged to receive a video bitstream representing a video sequence; and a defect module arranged to determine a measure of quantization parameter for each picture of the video sequence, the defect module further arranged to identify a quality defect when an abrupt change in the measure of quantization parameter occurs.

摘要翻译： 提供了一种用于检测视频序列中的质量缺陷的装置，该装置包括：接收机，被配置为接收表示视频序列的视频比特流; 以及缺陷模块，被布置为确定所述视频序列的每个图像的量化参数的度量，所述缺陷模块还被布置为当出现量化参数测量的突然变化时识别质量缺陷。

公开(公告)号：US08750384B2

公开(公告)日：2014-06-10

申请号：US13139379

申请日：2008-12-15

申请人： Martin Pettersson

发明人： Martin Pettersson

IPC分类号： H04N7/12 ,  H04B1/66

CPC分类号： H04N21/4884 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/27 ,  H04N19/85 ,  H04N19/86 ,  H04N21/23418 ,  H04N21/4312 ,  H04N21/4318 ,  H04N21/631 ,  H04N21/8146

摘要： In a method of distributing media content with overlay graphical information from a media server to a media client the graphical information is extracted from the media content and transmitted to a media client. Prior to encoding the media content, each frame that comprises an area of graphical information is processed in separate blocks, in a manner such that an introduction of visual arte facts in the vicinity of the graphical information is avoided. The encoded media content is then transmitted to the media client, where the media content will be reproduced by adding the graphical information as an overlay on top of the decoded media content, but without comprising any coding originated arte facts.

摘要翻译： 在从媒体服务器向媒体客户端分发具有覆盖图形信息的媒体内容的方法中，从媒体内容中提取图形信息并传送到媒体客户端。 在对媒体内容进行编码之前，包括图形信息区域的每个帧以单独的块来处理，以便避免在图形信息附近引入视觉特征事实。 然后将经编码的媒体内容传送到媒体客户端，通过将解码的媒体内容之上的叠加图形信息添加到媒体内容中，而不包含任何编码的原始事实，将再现媒体内容。

公开(公告)号：US08144981B2

公开(公告)日：2012-03-27

申请号：US12064207

申请日：2006-07-14

申请人： Martin Pettersson ,  Jacob Ström

发明人： Martin Pettersson ,  Jacob Ström

IPC分类号： G06K9/36 ,  G06K9/00

CPC分类号： G06T9/008 ,  G06T9/005

摘要： In an image-encoding scheme, an input image is decomposed into image blocks comprising multiple image elements. The image blocks are then encoded into encoded blocks. An encoded block comprises a first color codeword, a second color codeword, a color modifier codeword and a color index sequence. The color codewords are representations of a first and second base color located on a first line in color space. The modifier codeword is a representation of at least one color modifier for modifying the first base color along a second line to obtain multiple color representations along the line. The second line has a different direction as compared to the first line. The index sequence comprises color indices associated with a color representation selected form i) the representations on the second line and ii) at least one representation based on the second base color.

摘要翻译： 在图像编码方案中，输入图像被分解成包括多个图像元素的图像块。 然后将图像块编码为编码块。 编码块包括第一颜色码字，第二颜色码字，颜色修饰符码字和颜色索引序列。 颜色代码字是位于颜色空间中的第一行上的第一和第二基色的表示。 修饰符码字是至少一个颜色修饰符的表示，用于沿着第二条线修改第一基色以沿着该线获得多个颜色表示。 第二行与第一行的方向不同。 索引序列包括与从i）第二行上的表示相关联的颜色表示的颜色索引，以及ii）基于第二基本颜色的至少一个表示。

公开(公告)号：US20110299593A1

公开(公告)日：2011-12-08

申请号：US13201619

申请日：2009-03-13

申请人： Martin Pettersson ,  Andreas Rossholm

发明人： Martin Pettersson ,  Andreas Rossholm

IPC分类号： H04N7/26 ,  H04N7/24 ,  H04N7/12

CPC分类号： H04N19/154 ,  H04N7/17318 ,  H04N19/127 ,  H04N19/139 ,  H04N19/14 ,  H04N19/159 ,  H04N19/176 ,  H04N19/42 ,  H04N19/44 ,  H04N19/46 ,  H04N19/523 ,  H04N19/573 ,  H04N19/61 ,  H04N21/2353 ,  H04N21/44004 ,  H04N21/64784

摘要： In a method for extracting information from an encoded bit stream, the extracted information may be used for improving bit stream quality assessment, or for adapting a decoding sub-system. From an encoded bit stream, received from a bit stream source, complexity related information that is indicative of the complexity of the encoding of said bit stream is extracted. On the basis of said extracted complexity related information one or more data settings are then selected, after which the data settings may be used as an input for improving bit stream quality assessment at a decoding device or a network node, or for adapting a bit stream decoding sub-system at a decoding device.

摘要翻译： 在从编码比特流中提取信息的方法中，所提取的信息可以用于改进比特流质量评估或用于适配解码子系统。 提取了从比特流源接收的编码比特流，表示所述比特流的编码的复杂度的复杂度相关信息。 基于所述提取的复杂度相关信息，然后选择一个或多个数据设置，之后可以将数据设置用作用于改进解码设备或网络节点处的比特流质量评估的输入，或者用于适配比特流 在解码装置处解码子系统。