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1. 发明授权

US09549183B2 Method and device for estimating video quality on bitstream level 有权
标题翻译：用于估计比特流级别的视频质量的方法和装置
公开(公告)号：US09549183B2
公开(公告)日：2017-01-17
申请号：US14116342
申请日：2011-05-12
申请人： Ning Liao , Xiao Dong Gu , Zhibo Chen , Kai Xie
发明人： Ning Liao , Xiao Dong Gu , Zhibo Chen , Kai Xie
IPC分类号： H04N19/107 , H04N19/89 , H04N19/513 , H04N19/154 , H04N19/895
CPC分类号： H04N19/513 , H04N19/107 , H04N19/154 , H04N19/895
摘要： A method for estimating video quality on bit-stream level, wherein the video quality refers to a video after error concealment and the method is performed on bit-stream level before said error concealment, comprises extracting and/or calculating a plurality of global condition features from a video bit-stream, extracting and/or calculating a plurality of local effectiveness features at least for a lost MB, calculating a numeric error concealment effectiveness level for each (or at least for each lost) MB by emulating an error concealment method that is used in said error concealment, and providing the calculated error concealment effectiveness level as an estimated visible artifacts level of video quality.
摘要翻译：一种用于估计比特流级别的视频质量的方法，其中所述视频质量是指在错误隐藏之后的视频，并且所述方法在所述错误隐藏之前的比特流级别上执行，包括提取和/或计算多个全局条件特征至少对于丢失MB提取和/或计算多个局部有效特征，通过模拟错误隐藏方法（或至少对于每个丢失的）MB来计算数字错误隐藏有效性级别用于所述错误隐藏，并将计算出的错误隐藏有效性级别提供为视频质量的估计可见伪像级别。

2. 发明授权

US09202269B2 User terminal device, server device, system and method for assessing quality of media data 有权
标题翻译：用户终端设备，服务器设备，评估媒体数据质量的系统和方法
公开(公告)号：US09202269B2
公开(公告)日：2015-12-01
申请号：US14127325
申请日：2011-06-21
申请人： Kai Xie , Xiao Dong Gu , Zhibo Chen
发明人： Kai Xie , Xiao Dong Gu , Zhibo Chen
IPC分类号： G06K9/62 , G06T7/00 , H04N17/00 , G06K9/46 , H04N21/234 , H04N21/25 , H04N21/475 , H04N21/658 , H04L12/24 , G06Q30/02
CPC分类号： G06T7/0002 , G06K9/46 , G06Q30/0278 , H04L41/5067 , H04N17/004 , H04N21/23418 , H04N21/251 , H04N21/475 , H04N21/6582
摘要： A user terminal device, a server device, a system and a method for assessing quality of media data are described. The user terminal device is used for extracting artifact features from the media data and for communicating the features to the server device which is then used for determining a quality score using the artifacts and an artifact/quality score database accessible by the server device. The score, transmitted to the user terminal device, is presented to a user from which a subjective quality score and a request for re-determination are received which the user terminal device communicates to the server device. This in turn is used for re-determining the quality score and for transmitting back the re-determined quality score wherein the quality score is re-determined using the received artifacts, the received subjective quality score and the artifact/quality score database.
摘要翻译：描述用于评估媒体数据质量的用户终端设备，服务器设备，系统和方法。用户终端设备用于从媒体数据中提取伪像特征，并将特征传送到服务器设备，然后将服务器设备用于使用伪像和由服务器设备访问的伪影/质量得分数据来确定质量得分。发送给用户终端设备的分数被呈现给用户，用户终端设备从服务器设备接收到主观质量得分和重新确定请求。这又用于重新确定质量得分并用于发送回重新确定的质量得分，其中使用接收到的人造物，接收到的主观质量得分和人工/质量得分数据库重新确定质量得分。

3. 发明申请

US20140140612A1 USER TERMINAL DEVICE, SERVER DEVICE, SYSTEM AND METHOD FOR ASSESSING QUALITY OF MEDIA DATA 有权
标题翻译：用户终端设备，服务器设备，用于评估媒体数据质量的系统和方法
公开(公告)号：US20140140612A1
公开(公告)日：2014-05-22
申请号：US14127325
申请日：2011-06-21
申请人： Kai Xie , Xiao Dong Gu , Zhibo Chen
发明人： Kai Xie , Xiao Dong Gu , Zhibo Chen
IPC分类号： G06T7/00 , G06K9/46
CPC分类号： G06T7/0002 , G06K9/46 , G06Q30/0278 , H04L41/5067 , H04N17/004 , H04N21/23418 , H04N21/251 , H04N21/475 , H04N21/6582
摘要： A user terminal device, a server device, a system and a method for assessing quality of media data are described. The user terminal device is used for extracting artefact features from the media data and for communicating the features to the server device which is then used for determining a quality score using the artefacts and an artefact/quality score database accessible by the server device. The score, transmitted to the user terminal device, is presented to a user from which a subjective quality score and a request for re-determination are received which the user terminal device communicates to the server device. This in turn is used for re-determining the quality score and for transmitting back the re-determined quality score wherein the quality score is re-determined using the received artefacts, the received subjective quality score and the artefact/quality score database.
摘要翻译：描述用于评估媒体数据质量的用户终端设备，服务器设备，系统和方法。用户终端设备用于从媒体数据中提取伪像特征，并用于将特征传送到服务器设备，然后使用该装置来确定质量得分以及由服务器设备访问的伪影/质量得分数据库。发送给用户终端设备的分数被呈现给用户，用户终端设备从服务器设备接收到主观质量得分和重新确定请求。这反过来用于重新确定质量得分并用于发送回重新确定的质量得分，其中使用所接收的伪影，接收到的主观质量得分和伪影/质量得分数据库重新确定质量得分。

4. 发明授权

US10075710B2 Video quality measurement 有权
公开(公告)号：US10075710B2
公开(公告)日：2018-09-11
申请号：US14353351
申请日：2011-11-24
申请人： Fan Zhang , Ning Liao , Kai Xie , Zhibo Chen
发明人： Fan Zhang , Ning Liao , Kai Xie , Zhibo Chen
IPC分类号： H04N19/89 , H04N17/00 , H04N19/895
CPC分类号： H04N19/176 , H04N17/004 , H04N19/895
摘要： A particular implementation receives a bitstream and derives parameters from the bitstream. The parameters include quantization parameters, content unpredictability parameters, ratios of lost blocks, ratios of propagated blocks, error concealment distances, motion vectors, durations of freezing, and frame rates. Using these parameters, a compression distortion factor, a slicing distortion factor, and a freezing distortion factor are estimated respectively for distortions resulting from video compression, a slicing mode error concealment, and a freezing slicing mode error concealment. The distortion factors are then mapped to a composite video quality score. For applications with limited computational power, the estimation of distortion factors can be simplified. In particular, the compression distortion factor, the slicing distortion factor, and the freezing distortion factor can be predicted from quantization parameters, ratios of lost blocks, and durations of freezing, respectively.

5. 发明授权

US09961340B2 Method and apparatus for video quality measurement 有权
公开(公告)号：US09961340B2
公开(公告)日：2018-05-01
申请号：US14364144
申请日：2011-12-15
申请人： Fan Zhang , Ning Liao , Kai Xie , Zhibo Chen
发明人： Fan Zhang , Ning Liao , Kai Xie , Zhibo Chen
IPC分类号： H04N7/12 , H04N17/00 , H04N19/176 , H04N19/124 , H04N19/154
CPC分类号： H04N17/004 , H04N19/124 , H04N19/154 , H04N19/176
摘要： Accuracy and efficiency of video quality measurement are major problems to be solved. According to the invention, a method for accurately predicting video quality uses a rational function of the quantization parameter QP, which is corrected by a correction function that depends on content unpredictability CU. Exemplarily, the correction function is a power function of the CU. Both QP and CU can be computed from the video elementary stream, without full decoding the video. This ensures high efficiency.

6. 发明申请

US20150215619A1 METHOD AND APPARATUS FOR DETECTING GRADUAL TRANSITION PICTURE IN VIDEO BITSTREAM 有权
标题翻译：用于检测视频比特中梯度过渡图像的方法和装置
公开(公告)号：US20150215619A1
公开(公告)日：2015-07-30
申请号：US14423325
申请日：2012-12-29
申请人： Ning Liao , Zhibo Chen , Kai Xie
发明人： Ning Liao , Zhibo Chen , Kai Xie
IPC分类号： H04N19/109 , H04N19/176 , H04N19/182 , H04N19/154 , H04N19/142 , H04N19/184
CPC分类号： H04N19/109 , H04N5/147 , H04N17/004 , H04N19/11 , H04N19/142 , H04N19/154 , H04N19/176 , H04N19/182 , H04N19/184 , H04N19/48
摘要： The invention provides a method and apparatus for detecting a gradual transition picture in a bitstream. The method comprises: accessing a bitstream including encoded pictures; and determining a gradual transition picture in the bitstream using information from the bitstream without decoding the bitstream to derive pixel information.
摘要翻译：本发明提供一种用于检测比特流中的逐渐转换图像的方法和装置。该方法包括：访问包括编码图像的比特流; 以及使用来自所述比特流的信息确定所述比特流中的逐渐转换图像，而不解码所述比特流以导出像素信息。

7. 发明申请

US20140301486A1 VIDEO QUALITY ASSESSMENT CONSIDERING SCENE CUT ARTIFACTS 审中-公开
标题翻译：视频质量评估考虑场景剪裁艺术
公开(公告)号：US20140301486A1
公开(公告)日：2014-10-09
申请号：US14355975
申请日：2011-11-25
申请人： Ning Liao , Zhibo Chen , Fan Zhang , Kai Xie
发明人： Ning Liao , Zhibo Chen , Fan Zhang , Kai Xie
IPC分类号： H04N19/86 , H04N19/89 , H04N19/87
CPC分类号： H04N19/48 , H04N19/154 , H04N19/87 , H04N19/895
摘要： A particular implementation detects scene cut artifacts in a bitstream without reconstructing the video. A scene cut artifact is usually observed in the decoded video (1) when a scene cut picture in the original video is partially received or (2) when a picture refers to a lost scene cut picture in the original video. To detect scene cut artifacts, candidate scene cut pictures are first selected and scene cut artifact detection is then performed on the candidate pictures. When a block is determined to have a scene cut artifact, a lowest quality level is assigned to the block.
摘要翻译：特定的实现检测比特流中的场景切割伪像，而不重建视频。通常在解码视频（1）中观察到原始视频中的场景切换图像被部分接收或（2）当图片参考原始视频中的丢失的场景切换图像时，场景切割伪影。为了检测场景切割伪像，首先选择候选场景切割图像，然后对候选图像执行场景切割伪影检测。当确定块具有场景切割伪影时，将最低质量级别分配给块。

8. 发明申请

US20140286441A1 VIDEO QUALITY MEASUREMENT 审中-公开
标题翻译：视频质量测量
公开(公告)号：US20140286441A1
公开(公告)日：2014-09-25
申请号：US14353351
申请日：2011-11-24
申请人： Fan Zhang , Ning Liao , Kai Xie , Zhibo Chen
发明人： Fan Zhang , Ning Liao , Kai Xie , Zhibo Chen
IPC分类号： H04N19/89
CPC分类号： H04N19/00933 , H04N17/004 , H04N19/895
摘要： A particular implementation receives a bitstream and derives parameters from the bitstream. The parameters include quantization parameters, content unpredictability parameters, ratios of lost blocks, ratios of propagated blocks, error concealment distances, motion vectors, durations of freezing, and frame rates. Using these parameters, a compression distortion factor, a slicing distortion factor, and a freezing distortion factor are estimated respectively for distortions resulting from video compression, a slicing mode error concealment, and a freezing slicing mode error concealment. The distortion factors are then mapped to a composite video quality score. For applications with limited computational power, the estimation of distortion factors can be simplified. In particular, the compression distortion factor, the slicing distortion factor, and the freezing distortion factor can be predicted from quantization parameters, ratios of lost blocks, and durations of freezing, respectively.
摘要翻译：特定实现接收比特流并从比特流导出参数。参数包括量化参数，内容不可预测性参数，丢失块的比率，传播块的比率，错误隐藏距离，运动向量，冻结持续时间和帧速率。分别使用这些参数来估计压缩失真因子，切片失真因子和冻结失真因子，用于由视频压缩，切片模式错误隐藏和冷冻切片模式错误隐藏产生的失真。然后将失真因子映射到复合视频质量得分。对于具有有限计算能力的应用，可以简化失真因子的估计。具体地，压缩失真因子，切片失真因子和冻结失真因子可以分别从量化参数，丢失块的比率和冻结时间预测。

9. 发明授权

US09769501B2 Video quality assessment at a bitstream level 有权
公开(公告)号：US09769501B2
公开(公告)日：2017-09-19
申请号：US14405079
申请日：2012-07-17
申请人： Ning Liao , Zhibo Chen , Kai Xie
发明人： Ning Liao , Zhibo Chen , Kai Xie
IPC分类号： H04N19/895 , H04N19/44 , H04N19/184 , H04N19/139 , H04N19/177 , H04N17/00 , H04N19/86 , H04N19/89 , H04N19/154
CPC分类号： H04N19/895 , H04N17/004 , H04N19/139 , H04N19/154 , H04N19/177 , H04N19/184 , H04N19/44 , H04N19/86 , H04N19/89
摘要： A macroblock in a video sequence may be undecodable because the corresponding compressed data is lost or the syntax is out of synchronization. An undecodable macroblock may be concealed using error concealment technique. The level of initial visible artifacts caused by undecodable macroblocks may be estimated as a function of motion magnitude, error concealment distance, and/or residual energy. The initial visible artifacts may propagate spatially or temporally to other macroblocks through prediction. Considering both initial visible artifacts and propagated artifacts, levels of overall artifacts may be estimated for individual macroblocks. The visual quality for the video sequence can then be estimated by pooling the macroblock level artifact levels.

10. 发明授权

US09672636B2 Texture masking for video quality measurement 有权
公开(公告)号：US09672636B2
公开(公告)日：2017-06-06
申请号：US14358289
申请日：2012-04-23
申请人： Fan Zhang , Kai Xie , Wenfei Jiang , Zhibo Chen
发明人： Fan Zhang , Kai Xie , Wenfei Jiang , Zhibo Chen
IPC分类号： G06T7/40 , G06T7/00 , H04N19/154 , H04N19/172 , H04N19/117 , H04N19/14 , H04N19/86 , G06T7/13 , G06T7/44 , H04N19/162
CPC分类号： G06T7/40 , G06T7/0002 , G06T7/13 , G06T7/44 , G06T2207/10016 , G06T2207/20028 , G06T2207/30168 , H04N19/117 , H04N19/14 , H04N19/154 , H04N19/162 , H04N19/172 , H04N19/865
摘要： A particular implementation decomposes an image into a structure component and a texture component. An edge strength map is calculated for the structure component, and a texture strength map is calculated for the texture component. Using the edge strength and the texture strength, texture masking weights are calculated. The stronger the texture strength is, or the weaker the edge strength is, the more distortion can be tolerated by human eyes, and thus, the smaller the texture masking weight is. The local distortions are then weighted by the texture masking weights to generate an overall distortion level or an overall quality metric.

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