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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

WO2007066066A3 NON-INTRUSIVE VIDEO QUALITY MEASUREMENT 审中-公开
标题翻译：非侵入式视频质量测量
公开(公告)号：WO2007066066A3
公开(公告)日：2007-08-02
申请号：PCT/GB2006004155
申请日：2006-11-07
申请人： BRITISH TELECOMM , 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 application is concerned with a non-intrusive 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 in order to obtain an estimate for the subjective visual quality of the decoded video.
摘要翻译：该应用涉及非侵入式视频质量测量方法，特别是其中视频信号具有原始形式; 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）组合所述第一和第二测量以便获得所述解码视频的主观视觉质量的估计。

3. 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。

4. 发明申请

WO1992011627A2 SPEECH CODING 审中-公开
标题翻译：语音编码
公开(公告)号：WO1992011627A2
公开(公告)日：1992-07-09
申请号：PCT/GB1991002291
申请日：1991-12-20
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , FREEMAN, Daniel, Kenneth , WONG, Wing-Tak-Kenneth , DAVIS, Andrew, Gordon
发明人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
IPC分类号： G10L09/14
CPC分类号： G10L19/083 , G10L19/12 , G10L2019/0013 , G10L2019/0014
摘要： In a codebook excited speech coder, speech is analysed (200) to produce coefficients of a synthesis filter and (203, 204) the parameters of a long-term prediction filter (LTP) and a codeword indication one of a set of excitations (stored in 205), the results being transmitted to a receiver where they can be used to resynthesise the speech. The LTP and excitation analysis involve computation (224) of impulse response products (stored in 301, 302). Computation of new products is performed by adding additional terms to products already formed. Multiplication of these products by excitation terms is performed using a pointer table (303) storing precalculated addresses of locations in the store (301, 302). If some excitations are shifted versions of others, some addressed can be obtained by modifying other addresses. The LTP analysis (203) may include selection between a simple delay prediction and a prediction consisting of the sum of two differently delayed terms, to provide improved predictor delay resolution.
摘要翻译：在由“字典”激励的语音编码器中，语音信号被分析（200）以产生合成滤波器的系数和（203,204）长期预测滤波器（LTP）的参数。）和构成一组激励（在205处存储）的激励之一的码字指示，结果被发送到接收机，在那里它们可以用于语音信号的新合成。 LTP和激励分析包括脉冲响应产品（存储在301和302）的计算（224）。新产品的计算方法是在已形成的产品中增加附加条款。通过激励项乘以这些乘积是使用存储先前计算的存储位置地址（301,302）的指示表（303）来执行的。当某些激励是其他激励的偏移版本时，某些地址可以通过修改其他地址来获得。 LTP分析（203）可以包括在简单延迟预测和包括具有不同延迟的两个项的相加之和的预测之间的选择，这提供了预测器延迟的改善的分辨率。

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

WO2008081185A2 VIDEO SIGNAL ENCODING 审中-公开
标题翻译：视频信号编码
公开(公告)号：WO2008081185A2
公开(公告)日：2008-07-10
申请号：PCT/GB2008000010
申请日：2008-01-03
申请人： BRITISH TELECOMM , 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： H04N19/154
CPC分类号： H04N19/192 , H04N19/115 , H04N19/117 , H04N19/126 , H04N19/154 , H04N19/162 , H04N19/177 , H04N19/196 , H04N19/61
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.
摘要翻译：用于对视频信号进行编码的方法和系统提供被压缩的编码信号，以便当信号被解码和显示时，它可以在其估计的感知质量方面满足预定标准的同时可以有效地通过链路传输。这通过在编码端提供利用感知质量度量（PQM）系统（32）来量化估计的感知质量的控制单元（24）来实现，以及控制逻辑（34），其将所述量化的PQM与信号在传输之前必须满足的用户定义标准。如果满足标准，信号优选仅在通信链路上向前传输。否则，控制单元（24）可操作地修改信号，例如，或者使用修改后的编码参数对信号进行重新编码，以提高其质量，即使量化的PQM趋于标准。在产生的PQM满足标准之前可能需要该编码修改编码序列的多次迭代，并且因此被传送。可以限制迭代次数，在这种情况下，修改的编码应至少提供感知质量的改善。

7. 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。

8. 发明申请

WO1993010623A1 TRANSMISSION SYSTEM FOR CODED SPEECH SIGNALS AND/OR VOICEBAND DATA 审中-公开
标题翻译：用于编码语音信号和/或语音数据的传输系统
公开(公告)号：WO1993010623A1
公开(公告)日：1993-05-27
申请号：PCT/GB1992002102
申请日：1992-11-13
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY , DAVIS, Andrew, Gordon
发明人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
IPC分类号： H04M11/06
CPC分类号： H04L25/4908 , H04J3/1682 , H04M11/068
摘要： A digital coder receives (input 100) either speech or voice-band data. When receiving speech this is coded by a digital speech coder (102) and formatted into frames with parity bits (106). If modulated data are present this is recognised by a detector (107) which routes the signals instead via a demodulator (108). Parity bits are generated from the same frame portions but parity is inverted (110) so that a parity checking unit at a receiver (not shown) can readily recognise the change. Preferably means (111) are provided to insert into data frames codewords identifying the start and end and indicating the type of modulation in use. Additional detectors (107) and demodulators can be added for different types of modulation.
摘要翻译：数字编码器接收（输入100）语音或语音带数据。当接收到语音时，它由数字语音编码器（102）编码并被格式化成具有奇偶校验位（106）的帧。如果存在调制数据，则由检测器（107）识别出，经由解调器（108）来传送信号。从相同的帧部分生成奇偶校验位，但是奇偶校验被反转（110），使得接收机（未示出）处的奇偶校验单元可以容易地识别该改变。优选地，提供装置（111）以插入识别开始和结束并指示使用中的调制类型的数据帧码字。可以为不同类型的调制添加附加的检测器（107）和解调器。

9. 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。

10. 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。

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