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1. 发明申请

WO2008081185A3 VIDEO SIGNAL ENCODING WITH ITERATED RE-ENCODING 审中-公开
公开(公告)号：WO2008081185A3
公开(公告)日：2008-07-10
申请号：PCT/GB2008/000010
申请日：2008-01-03
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , DAVIS, Andrew, Gordon , BAYART, Damien, Roger, Rene , HANDS, David, Sneddon
发明人： DAVIS, Andrew, Gordon , BAYART, Damien, Roger, Rene , HANDS, David, Sneddon
IPC分类号： H04N7/26 , H04N7/50
摘要： A method and system for encoding a video signal provides an encoded signal that is compressed in order that it may be efficiently transmitted over the link whilst also meeting a predetermined standard in terms of its estimated perceptual quality when the signal is decoded and displayed. This is achieved by providing, at the encoding end, a control unit (24) which utilises a perceptual quality metric (PQM) system (32) to quantify the estimated perceptual quality, and control logic (34) that compares said quantified PQM with a user-defined criterion that the signal must meet prior to transmission. The signal is preferably only transmitted onwards over the communications link if the criterion is met. Otherwise, the control unit (24) is operable either to modify the signal, e.g. using pre-filtering, or use modified encoding parameters to re-encode the signal in such a way as to improve its quality, that is to make the quantified PQM converge towards the criterion. A number of iterations of this encode-modify-encode sequence may be required before the resulting PQM meets the criterion and so be transmitted. The number of iterations may be limited in which case the modified encoding should at least provide an improvement in perceptual quality.

2. 发明申请

WO2004114215A2 METHOD AND SYSTEM FOR VIDEO QUALITY ASSESSMENT 审中-公开
标题翻译：视频质量评估方法与系统
公开(公告)号：WO2004114215A2
公开(公告)日：2004-12-29
申请号：PCT/GB2004/002384
申请日：2004-06-04
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , BOURRET, Alexandre, Jean , HANDS, David, Sneddon , BAYART, Damien , DAVIS, Andrew, Gordon
发明人： BOURRET, Alexandre, Jean , HANDS, David, Sneddon , BAYART, Damien , DAVIS, Andrew, Gordon
IPC分类号： G06T7/00
CPC分类号： H04N17/004 , G06T7/001 , H04N17/02
摘要： A method and system for automated video quality assessment which reduces the adverse effects of sub-field/frame misalignments between the reference and test sequences. More particularly, the invention provides for misalignments down to a sub-field/frame level to be handled by individually matching sub-field/frame elements of a test video field/frame with sub-field/frame elements from a reference video field/frame. The use of a matching element size that is significantly smaller than the video field/frame size enables transient sub-field/frame misalignments to be effectively tracked.
摘要翻译：一种用于自动视频质量评估的方法和系统，其减少了参考和测试序列之间的子场/帧失准的不利影响。更具体地说，本发明提供了通过将来自测试视频场/帧的子场/帧元素与来自参考视频场/帧的子场/帧元素单独匹配来处理的子场/帧级别的未对准。使用明显小于视频字段/帧大小的匹配元素大小使得能够有效地跟踪瞬时子场/帧未对准。

3. 发明申请

WO2004114215A3 METHOD AND SYSTEM FOR VIDEO QUALITY ASSESSMENT 审中-公开
公开(公告)号：WO2004114215A3
公开(公告)日：2004-12-29
申请号：PCT/GB2004/002384
申请日：2004-06-04
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , BOURRET, Alexandre, Jean , HANDS, David, Sneddon , BAYART, Damien , DAVIS, Andrew, Gordon
发明人： BOURRET, Alexandre, Jean , HANDS, David, Sneddon , BAYART, Damien , DAVIS, Andrew, Gordon
IPC分类号： G06T7/00
摘要： A method and system for automated video quality assessment which reduces the adverse effects of sub-field/frame misalignments between the reference and test sequences. More particularly, the invention provides for misalignments down to a sub-field/frame level to be handled by individually matching sub-field/frame elements of a test video field/frame with sub-field/frame elements from a reference video field/frame. The use of a matching element size that is significantly smaller than the video field/frame size enables transient sub-field/frame misalignments to be effectively tracked.

4. 发明申请

WO2007066066A2 VIDEO QUALITY MEASUREMENT 审中-公开
标题翻译：视频质量测量
公开(公告)号：WO2007066066A2
公开(公告)日：2007-06-14
申请号：PCT/GB2006/004155
申请日：2006-11-07
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , DAVIS, Andrew, Gordon
发明人： DAVIS, Andrew, Gordon
IPC分类号： H04N7/50 , H04N7/26 , H04N17/02
CPC分类号： H04N17/004 , H04N19/124 , H04N19/154 , H04N19/44 , H04N19/61
摘要： This invention is concerned with a video quality measurement method, in particular where the video signal having: an original form; encoded form in which video signal has been encoded using a compression algorithm utilising a variable quantiser step size such that the encoded signal includes a quantiser step size parameter; and, a decoded form in which the encoded video signal has been at least in part reconverted to the original form. The method comprises the steps of: a) generating a first quality measure which is a function of said quantiser step size parameter; b) generating a second quality measure which is a function of the spatial complexity of the frames represented by the video signal in the decoded form; and, c) combining the first and second measures.
摘要翻译：本发明涉及视频质量测量方法，特别是在具有原始形式的视频信号的情况下，使用利用可变量化器步长的压缩算法编码视频信号的编码形式，使得编码信号包括量化器步长参数; 以及编码视频信号至少部分地转换为原始形式的解码形式。该方法包括以下步骤：a）产生作为所述量化器步长参数的函数的第一质量度量; b）产生作为由解码形式的视频信号表示的帧的空间复杂度的函数的第二质量度量; 以及c）组合第一和第二措施。

5. 发明申请

WO2011121311A1 VIDEO QUALITY MEASUREMENT 审中-公开
标题翻译：视频质量测量
公开(公告)号：WO2011121311A1
公开(公告)日：2011-10-06
申请号：PCT/GB2011/000504
申请日：2011-03-31
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , DAVIS, Andrew, Gordon
发明人： DAVIS, Andrew, Gordon
IPC分类号： H04N17/00 , H04N7/26
CPC分类号： H04N7/26888 , H04N17/004 , H04N19/117 , H04N19/154 , H04N19/17 , H04N19/44 , H04N19/61 , H04N19/86
摘要： A method of generating a measure of quality for a video signal representative of a plurality of frames, the video signal having: an original form; an encoded form in which the video signal has been encoded using a compression algorithm utilising a variable quantiser step size such that the encoded signal has a quantiser step size parameter associated therewith and utilising differential coding such that the encoded signal contains representations of the prediction residual of the signal; and a decoded form in which the encoded video signal has been at least in part reconverted to the original form, the method comprising: a) generating a first quality measure which is dependant on said quantiser step size parameter according to a predetermined relationship; b) generating a masking measure, the masking measure being dependant on the spatial complexity of at least part of the frames represented by the video signal in the decoded form according to a first predetermined relationship; and c) generating a combined measure, the combined measure being dependant upon both the first measure and the masking measure according to a predetermined relationship, wherein, the method also includes: generating an first measure which is dependant on the prediction residual of the signal according to a first predetermined relationship; and identifying one or more regions of the picture for which the first measure exceeds a threshold, wherein the masking measure is dependant on the spatial complexity of the identified region(s) according to a predetermined relationship; and further comprises: generating a background measure which is dependant on the prediction residual of the signal according to a second predetermined relationship; and identifying one or more other regions of the picture for which the background measure is below a threshold, wherein the masking measure is dependent on the spatial complexity of the identified other region(s) according to a predetermined relationship.
摘要翻译：一种产生表示多个帧的视频信号的质量测量的方法，所述视频信号具有：原始形式; 编码形式，其中使用利用可变量化器步长的压缩算法对视频信号进行编码，使得编码信号具有与其相关联的量化器步长参数并利用差分编码，使得编码信号包含预测残差的表示信号; 以及编码视频信号至少部分地转换为原始形式的解码形式，所述方法包括：a）根据预定关系产生依赖于所述量化器步长参数的第一质量度量; b）产生掩蔽度量，所述掩蔽度量依赖于根据第一预定关系以解码形式由视频信号表示的至少部分帧的空间复杂度; 以及c）生成组合度量，所述组合度量取决于所述第一测量值和所述掩蔽测量值根据预定关系，其中，所述方法还包括：产生依赖于所述信号的预测残差的第一测量值达到第一预定关系; 以及识别所述第一测量超过阈值的所述图片的一个或多个区域，其中所述屏蔽测量依据所述已识别区域的空间复杂度根据预定关系; 并且还包括：根据第二预定关系产生取决于信号的预测残差的背景测量; 以及识别所述背景测量低于阈值的所述图片的一个或多个其他区域，其中所述屏蔽测量依据所述所识别的其他区域的空间复杂性根据预定关系。

6. 发明申请

WO2008139135A1 VIDEO SIGNAL ANALYSIS 审中-公开
标题翻译：视频信号分析
公开(公告)号：WO2008139135A1
公开(公告)日：2008-11-20
申请号：PCT/GB2008/001276
申请日：2008-04-11
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , DAVIS, Andrew, Gordon
发明人： DAVIS, Andrew, Gordon
IPC分类号： H04N5/44 , H04N7/01
CPC分类号： H04N7/012 , H04N7/0115
摘要： In order to detect interlace errors in a video signal, one receives successive digitally coded frames, each frame comprising data for a field of a first type and data for a field of a second type (i.e. a top field and bottom field or vice versa). One then generates for each field of the first type: - a first difference signal (Dl F1 ) representative of the difference between the field and the second-type field of the previous frame; - a second difference signal (Dl F2) representative of the difference between the field and the second-type field of the same frame; and - a third difference signal (Dl F3) representative of the difference between the field and the second-type field of the following frame. Then, in dependence of the values of said difference signals, a decision signal (wOFIag) is generated indicating an estimated temporal relationship of the field to the second-type field of the same frame. This can be compared with a signal (IDFO) indicating a purported temporal relationship, and an alarm signal (wEFIag) generated in the event of a mismatch.
摘要翻译：为了检测视频信号中的隔行错误，一个接收连续的数字编码帧，每个帧包括用于第一类型的场的数据和用于第二类型的场的数据（即顶场和底场，反之亦然）。然后，对于第一类型的每个场产生一个： - 表示前一帧的场和第二类型场之间的差的第一差分信号（D1 F1） - 表示相同帧的场和第二类型场之间的差的第二差信号（D1 F2）以及 - 表示后续帧的场和第二类型字段之间的差的第三差分信号（D1F3）。然后，根据所述差分信号的值，生成指示该场与同一帧的第二类场的估计时间关系的判定信号（wOFIag）。这可以与指示声称的时间关系的信号（IDFO）和在不匹配的情况下生成的报警信号（wEFIag）进行比较。

7. 发明申请

WO2012042225A1 DIGITAL VIDEO FINGERPRINTING 审中-公开
标题翻译：数字视频指纹
公开(公告)号：WO2012042225A1
公开(公告)日：2012-04-05
申请号：PCT/GB2011/001430
申请日：2011-09-30
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , DAVIS, Andrew, Gordon
发明人： DAVIS, Andrew, Gordon
IPC分类号： H04N7/26 , H04N7/50 , G06F17/30 , G06F21/00 , G06K9/00
CPC分类号： G06T1/0021 , G06F17/30784 , G06F21/10 , G06F21/64 , G06F2221/0733 , G06K9/00744 , H04N19/14 , H04N19/172 , H04N19/176 , H04N19/177 , H04N19/18 , H04N19/48 , H04N19/61
摘要： A digitally encoded video fingerprinting system for generating and comparing/matching fingerprints from digitally encoded video which has been encoded according to an encoding method which involves the generation of residual macroblocks of pixels and the generation of quantized transform coefficients of the residual macroblocks, or of portions of the residual macroblocks, comprises a fingerprint database (5) and a video processing subsystem (10). The video processing subsystem (10) includes a fingerprint sequence selection module (14, 24) which is operable to select one or more sets of frames from input video content to be processed in order to generate a fingerprint; a fingerprint calculation module (14, 26) which is operable to generate a fingerprint based on a set of frames selected by the fingerprint sequence selection module; and a fingerprint comparator module (14, 28) which is operable to compare two fingerprints and to output a similarity score of the compared fingerprints. The method used by the fingerprint selection and fingerprint calculation modules includes selecting a group of frames of the encoded video content; processing the digitally encoded video content to obtain a set of quantized transform coefficients of residual macroblocks or portions of residual macroblocks associated with each of the selected frames; identifying a set of residual macroblocks per frame whose transform coefficients satisfy a threshold criterion; and generating a digital video fingerprint for the encoded video content in dependence upon the identified macroblocks or some property thereof within each of the selected frames.
摘要翻译：一种数字编码视频指纹系统，用于产生和比较/匹配来自数字编码视频的指纹，该编码视频已经根据编码方法进行编码，该编码方法涉及产生残余宏块的像素和产生残余宏块的量化变换系数，的残留宏块包括指纹数据库（5）和视频处理子系统（10）。视频处理子系统（10）包括指纹序列选择模块（14,24），其可操作以从要处理的输入视频内容中选择一组或多组帧，以便生成指纹; 指纹计算模块（14,26），其可操作以基于由所述指纹序列选择模块选择的一组帧来生成指纹; 以及指纹比较器模块（14,28），其可操作以比较两个指纹并输出所述指纹的相似性得分。由指纹选择和指纹计算模块使用的方法包括选择编码视频内容的一组帧; 处理数字编码的视频内容以获得与所选择的每个帧相关联的剩余宏块或残余宏块的部分的量化变换系数集合; 识别其变换系数满足阈值标准的每帧的一组残余宏块; 以及根据所识别的宏块或每个所选择的帧中的某些属性，为编码的视频内容生成数字视频指纹。

8. 发明申请

WO2010004238A1 VIDEO QUALITY MEASUREMENT 审中-公开
标题翻译：视频质量测量
公开(公告)号：WO2010004238A1
公开(公告)日：2010-01-14
申请号：PCT/GB2009/001033
申请日：2009-04-23
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , DAVIS, Andrew, Gordon
发明人： DAVIS, Andrew, Gordon
IPC分类号： H04N17/00
CPC分类号： H04N17/004
摘要： This invention is concerned with a video quality measurement method, in particular where the video signal having: an original form; an encoded form in which video signal has been encoded using a compression algorithm utilising a variable quantiser step size such that the encoded signal includes a quantiser step size parameter; and, a decoded form in which the encoded video signal has been at least in part reconverted to the original form. The method comprises the steps of: a) generating a first quality measure which is a function of said quantiser step size parameter; b) generating a masking measure and c) combining the first and second measures. The masking measure is which is a function of the spatial complexity of parts of the frames represented by the video signal in the decoded form, these parts being selected by generating a second measure which is a function of the prediction residual and identifying one or more regions of the picture for which the second measure exceeds a threshold.
摘要翻译：本发明涉及视频质量测量方法，特别是在具有原始形式的视频信号的情况下，使用利用可变量化器步长的压缩算法编码视频信号的编码形式，使得编码信号包括量化器步长参数; 以及编码视频信号至少部分地转换为原始形式的解码形式。该方法包括以下步骤：a）产生作为所述量化器步长参数的函数的第一质量度量; b）产生掩蔽度量，c）组合第一和第二测量。掩蔽度量是由解码形式的视频信号表示的帧的部分的空间复杂度的函数，这些部分通过生成作为预测残差的函数的第二测量来选择，并且识别一个或多个区域第二个度量超过阈值的图片。

9. 发明申请

WO2015198011A1 BIOMETRIC IDENTIFICATION 审中-公开
标题翻译：生物识别
公开(公告)号：WO2015198011A1
公开(公告)日：2015-12-30
申请号：PCT/GB2015/051635
申请日：2015-06-05
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人： DAVIS, Andrew, Gordon , THOMPSON, Simon, Giles
IPC分类号： G06K9/03 , G06K9/20
CPC分类号： G06K9/00288 , G06F9/451 , G06K9/00228 , G06K9/00268 , G06K9/036 , G06K9/2027 , G06K9/4661
摘要： This invention provides a method of face recognition and a device for implementing said method, the method comprising the steps of: (a) performing a face recognition algorithm on an image of a user to determine an identity of the user, the image having an illumination level; (b) determining if a reliability measurement of the identity of the user determined by the face recognition algorithm meets a threshold indicating reliable identification and, if the reliability measurement is below the threshold indicating reliable identification; (c) receiving a new image of the user, the new image having an adjusted illumination level; and (d) performing a further face recognition algorithm on the new image of the user to determine the identity of the user.
摘要翻译：本发明提供了一种面部识别方法和一种用于实现所述方法的装置，所述方法包括以下步骤：（a）对用户的图像执行面部识别算法以确定用户的身份，所述图像具有照明水平; （b）确定由所述面部识别算法确定的所述用户的身份的可靠性测量是否满足指示可靠识别的阈值，以及如果所述可靠性测量值低于指示可靠识别的阈值; （c）接收用户的新图像，所述新图像具有调整的照明级别; 以及（d）对所述用户的新图像执行另外的人脸识别算法以确定所述用户的身份。

10. 发明申请

WO2015079195A1 NETWORK ACCESS FAULT REPORTING 审中-公开
标题翻译：网络访问故障报告
公开(公告)号：WO2015079195A1
公开(公告)日：2015-06-04
申请号：PCT/GB2014/000442
申请日：2014-10-31
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人： STEVENS, Timothy, Sean , DAVIS, Andrew, Gordon
IPC分类号： H04W24/04 , H04W84/04 , H04W88/08
CPC分类号： H04W24/04 , H04L63/08 , H04L63/10 , H04W8/30 , H04W12/06 , H04W12/08 , H04W24/10 , H04W36/08 , H04W76/10 , H04W76/30 , H04W84/045 , H04W88/08
摘要： A loss (13) of connection between a wireless access point (10) and a network (3) is reported to a network-based service platform (7) by the wireless access point (10) by automatically establishing wireless contact with a second wireless access point (20), and transmits a predetermined fault report message to a predetermined network platform address (7) by way of the second wireless access point and the second network interface. Authentication credentials are stored in the access point allowing automatic access to the service platform without user intervention, to allow the report to be generated without user intervention. The message may include data on recent usage of the access point (10), or may be repeated when a user (61) attempts to use the access point (10), in order to prioritise the fault reported at the service platform (7).
摘要翻译：无线接入点（10）通过自动建立与第二无线接入点（10）的无线联系来向无线接入点（10）向基于网络的服务平台（7）报告无线接入点（10）和网络（3）之间的连接的丢失（13）接入点（20），并通过第二无线接入点和第二网络接口向预定的网络平台地址（7）发送预定的故障报告消息。验证凭据存储在访问点中，允许自动访问服务平台而无需用户干预，以允许在无需用户干预的情况下生成报告。消息可以包括关于接入点（10）的近期使用的数据，或者当用户（61）尝试使用接入点（10）时，可以重复以便优先处理在服务平台（7）处报告的故障，。

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