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1.发明公开SCENE CHANGE DETECTION FOR PERCEPTUAL QUALITY EVALUATION IN VIDEO SEQUENCES 审中-公开SENENWECHSELERKENNUNGFÜRWAHRNEHMUNGSBEZOGENEQUALITÄTSBEURTEILUNG在VIDEOSEQUENZEN
公开(公告)号：EP3171586A2
公开(公告)日：2017-05-24
申请号：EP16204964.7
申请日：2011-10-11
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有关的信息，其中使用本文公开的方法之一来检测新场景。
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2.发明公开SCENE CHANGE DETECTION FOR PERCEPTUAL QUALITY EVALUATION IN VIDEO SEQUENCES 审中-公开视频序列中知觉质量评价的场景变化检测
公开(公告)号：EP3171586A3
公开(公告)日：2017-06-07
申请号：EP16204964.7
申请日：2011-10-11
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。 示例方法包括针对多个位置计算在连续图片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异之和满足阈值标准时识别新的场景。 还提供了一种确定分组丢失对流式传输视频的感知影响的方法，该方法包括：识别分组丢失; 以及确定丢失的分组是否包含在新场景开始时与图片有关的信息，其中使用本文公开的方法之一来检测新场景。
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3.发明公开
公开(公告)号：EP2561706A1
公开(公告)日：2013-02-27
申请号：EP10850346.7
申请日：2010-04-22
摘要： A user equipment (26) for wireless communication with a mobile base station (18). The user equipment is configured to: obtain a current location (P4) of the user equipment; receive a set of quality measures indicative of wireless data transfer rates in an area (A) comprising the current location (P4); present on a graphical interface (218) of the user equipment i) a new location (P5) comprised in the area (A), or ii) a direction (D5) to the new location (P5) comprised in the area (A). The new location (P5) is, in comparison with the current location (P4), associated with a relatively higher quality measure indicative of a wireless data transfer rate. A network node for obtaining and providing the set of quality measures is also disclosed, as well as related methods and computer readable mediums.
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4.发明公开METHOD AND SYSTEM FOR DETERMINING A QUALITY VALUE OF A VIDEO STREAM 有权VERFAHREN UND系统ZUR BESTIMMUNG EINESQUALITÄTSWERTSEINES VIDEOSTROMS
公开(公告)号：EP3122043A1
公开(公告)日：2017-01-25
申请号：EP16177498.9
申请日：2008-11-04
IPC分类号： H04N17/00
CPC分类号： H04N19/66 , H04L43/0835 , H04N17/004 , H04N19/154 , H04N19/159 , H04N19/46 , H04N19/521 , H04N19/89
摘要： A method of determining a quality value (Q) of a video stream (S) transmitted to a media player (211), comprising the steps of:
identifying at least two lost data packets (3, 4, 7, 8, 9) of the stream,
identifying intra coded frames (I1, I2, I3, I4) of the stream,
determining that the intra coded frame has a maintained image quality if none of the lost data packets identified are associated with the intra coded frame,
estimating a distance (D1; D2; D3; D4; D5) between the lost data packet and a next intra coded frame that occurs subsequently to the lost data packet in the stream and that has a maintained image quality, wherein said distance is defined by the difference between a frame number associated with the lost data packet and a frame number of the intra coded frame, and
generating the quality value, based on the distances.摘要翻译： 一种确定发送到媒体播放器（211）的视频流（S）的质量值（Q）的方法，包括以下步骤：识别至少两个丢失的数据分组（3,4,7,8,9） 流，识别流的帧内编码帧（I1，I2，I3，I4），如果没有识别到的丢失数据分组与帧内编码帧相关联，则确定帧内编码帧具有维持的图像质量，估计距离 （D1; D2; D3; D4; D5）之间的丢失数据分组和在流中的丢失数据分组之后发生并具有维持图像质量的下一帧内编码帧，其中所述距离由 与丢失的数据包相关联的帧号和帧内编码帧的帧号，并且基于距离生成质量值。
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公开(公告)号：EP2904738A1
公开(公告)日：2015-08-12
申请号：EP12769388.5
申请日：2012-09-28
CPC分类号： G06F17/2247 , G06F17/30899 , H04L43/028 , H04L43/04 , H04L43/0852 , H04L67/02 , H04L67/22 , H04L67/42
摘要： A method in a network setup that includes a client entity and a network for handling a data flow to the client entity. The method estimates a screen rendering time of content at the client entity. The method includes the steps of observing the data flow to the client entity, estimating a screen area at the client entity based on the observed data flow, determining, from the data flow, content data associated with rendering content in the screen area, extracting at least data items from the determined content data, and estimating, as the screen rendering time, the time required to render the content in the screen area at the client entity based on the extracted data items.
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6.发明公开SCENE CHANGE DETECTION FOR PERCEPTUAL QUALITY EVALUATION IN VIDEO SEQUENCES 审中-公开场景变化检测用于视频序列中感知相关的质量评价
公开(公告)号：EP2756662A1
公开(公告)日：2014-07-23
申请号：EP11768004.1
申请日：2011-10-11
IPC分类号： H04N5/14
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.
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公开(公告)号：EP3479579A1
公开(公告)日：2019-05-08
申请号：EP17742379.5
申请日：2017-06-29
IPC分类号： H04N21/234 , H04N21/24 , H04N21/44 , H04N21/84 , H04N17/00
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公开(公告)号：EP3268853A1
公开(公告)日：2018-01-17
申请号：EP15719868.0
申请日：2015-03-13
发明人： ÖKVIST, Peter , LINDEGREN, David , ARNGREN, Tommy , BURKERT, Till
IPC分类号： G06F3/0488 , G06F3/0484 , G06F17/30
CPC分类号： G06F1/1643 , G06F1/1694 , G06F3/0412 , G06F3/04842 , G06F3/0485 , G06F3/0488 , G06F17/30899
摘要： A device (100) for handheld operation is provided. The device comprises a touchscreen (110) and processing means (111) operative to display a plurality of user-interface (UI) elements (121-124) on the touchscreen, wherein each UI element is associated with an action which is performed in response to touching the UI element, determine one or more of the displayed UI elements which a user (150, 151) of the device is likely to touch based on a touch pattern (130), and perform, for at least one of the determined UI elements, the action associated with the UI element. The action may, e.g., comprise pre-fetching content which is likely to be requested by the user from a server (180). Performing an action, such as pre-fetching, based on a touch pattern is advantageous since a touch pattern reflects the relative likelihood that the user touches a specific position, or region, of the touchscreen, thereby reducing latency.
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公开(公告)号：EP2745518A1
公开(公告)日：2014-06-25
申请号：EP12835405.7
申请日：2012-01-16
发明人： TANO, Richard , LINDEGREN, David
CPC分类号： H04L65/80 , H04N17/004 , H04N19/136 , H04N19/154
摘要： One or more embodiments herein dynamically and objectively estimate user-perceived quality of an encoded video stream in dependence on the underlying video content of that stream. Estimation processing according to these embodiments includes generating a chronological sequence of the absolute or relative sizes of encoded video frames in the stream. Processing further entails analyzing this sequence to identify a plurality of reference characteristics that are defined in a reference model. These reference characteristics are more specifically defined in the reference model as parameters that characterize or are otherwise associated with content-dependent variations in user-perceived quality. For example, the reference characteristics in some embodiments comprise reference patterns or reference statistical measures that have been determined based on analyzing frame size sequences generated for reference video streams with known qualities. Regardless, processing finally includes estimating the user-perceived quality of the stream based on the identified reference characteristics, according to the reference model.
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公开(公告)号：EP3171586B1
公开(公告)日：2020-12-02
申请号：EP16204964.7
申请日：2011-10-11
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