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31. 发明授权

US08442108B2 Adaptive updates in motion-compensated temporal filtering 有权
标题翻译：运动补偿时间滤波中的自适应更新
公开(公告)号：US08442108B2
公开(公告)日：2013-05-14
申请号：US11126997
申请日：2005-05-10
申请人： Li Song , Jizheng Xu , Feng Wu
发明人： Li Song , Jizheng Xu , Feng Wu
IPC分类号： H04B1/66 , H04N7/01
CPC分类号： H04N19/615 , H04N19/124 , H04N19/13 , H04N19/577 , H04N19/61 , H04N19/63
摘要： Techniques and tools are described for scalable video coding and decoding. For example, a video encoder and decoder perform adaptive update operations in lifting-based motion-compensated temporal filtering and inverse motion-compensated temporal filtering, respectively. The encoder, in a prediction stage, computes a motion-compensated prediction for an odd image and computes a high-pass image as the difference between the odd image and the prediction. For an update stage, the encoder performs motion compensation on the high-pass image (and potentially another high-pass image) to compute a motion-compensated update. Based upon perceptual criteria, the encoder adaptively combines the update with an even image to form a low-pass image. The decoder, for an update stage, performs motion compensation on one or more high-pass images to compute a motion-compensated update. Based upon perceptual criteria, the encoder adaptively combines the update with a low-pass image to reconstruct an even frame.
摘要翻译：描述了可扩展视频编码和解码的技术和工具。例如，视频编码器和解码器分别在基于提升的运动补偿时间滤波和反运动补偿时间滤波中执行自适应更新操作。编码器在预测级中计算奇数图像的运动补偿预测，并计算高通图像作为奇数图像与预测之间的差。对于更新阶段，编码器对高通图像（和潜在的另一高通图像）执行运动补偿以计算运动补偿更新。基于感知标准，编码器将更新与均匀图像自适应地组合以形成低通图像。用于更新阶段的解码器对一个或多个高通图像执行运动补偿以计算运动补偿更新。基于感知标准，编码器将更新与低通图像自适应地组合以重构偶数帧。

32. 发明授权

US07801220B2 In-band wavelet video coding with spatial scalability 有权
标题翻译：具有空间可扩展性的带内小波视频编码
公开(公告)号：US07801220B2
公开(公告)日：2010-09-21
申请号：US11203817
申请日：2005-08-15
申请人： Dongdong Zhang , Feng Wu , Jizheng Xu
发明人： Dongdong Zhang , Feng Wu , Jizheng Xu
IPC分类号： H04N7/12
CPC分类号： H04N19/615 , H04N19/105 , H04N19/13 , H04N19/147 , H04N19/523 , H04N19/61 , H04N19/63
摘要： Exemplary improvements for in-band wavelet video coding with spatial scalability are described. In one implementation an encoder uses leaky prediction to balance a trade-off between reducing drifting errors at lower resolutions while maintaining coding performance at higher resolutions. In an alternative implementation, a trade-off technique defines two coding modes at the macroblock level. The first mode includes predictions employed at a low quality reference while the second mode includes predictions employed at a high quality reference. The method then adaptively selects the proper coding mode for each macroblock according to a rate-distortion criterion.
摘要翻译：描述了具有空间可伸缩性的带内小波视频编码的示例性改进。在一个实现中，编码器使用泄漏预测来平衡在较低分辨率下减少漂移误差之间的折衷，同时保持较高分辨率下的编码性能。在替代实现中，权衡技术定义了宏块级的两种编码模式。第一模式包括在低质量参考下使用的预测，而第二模式包括在高质量参考下使用的预测。然后，该方法根据速率失真准则自适应地选择每个宏块的适当编码模式。

33. 发明授权

US07580461B2 Barbell lifting for wavelet coding 有权
标题翻译：杠铃提升用于小波编码
公开(公告)号：US07580461B2
公开(公告)日：2009-08-25
申请号：US10911836
申请日：2004-08-04
申请人： Shipeng Li , Ruiqin Xiong , Lin Luo , Jizheng Xu , Feng Wu
发明人： Shipeng Li , Ruiqin Xiong , Lin Luo , Jizheng Xu , Feng Wu
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , G06K9/36 , G06K9/46
CPC分类号： H04N19/635 , H04N19/119 , H04N19/139 , H04N19/61 , H04N19/63
摘要： A method for encoding motion-compensated video data includes generating, for a current frame, a high-pass wavelet coefficient based on a function of pixels in a temporally adjacent frame. The operations are repeated for multiple pixels in an array of pixels in the current frame to form an array of high-pass wavelet coefficients. A low-pass wavelet coefficient is generated based on a function of the high-pass wavelet coefficients. A system for coding video data includes a temporal wavelet decomposition module decomposing a pixel into a high-pass coefficient by performing a discrete wavelet transform on the pixel, a function of pixels in a previous frame, and/or a function of pixels in a subsequent frame. The system includes a motion estimation module generating motion vectors associated with the pixels in the previous frame and in the subsequent frame.
摘要翻译：用于编码运动补偿视频数据的方法包括：基于时间上相邻帧中的像素的函数为当前帧生成高通小波系数。对当前帧中的像素阵列中的多个像素重复操作以形成高通小波系数的阵列。基于高通小波系数的函数产生低通小波系数。用于编码视频数据的系统包括时间小波分解模块，其通过对像素执行离散小波变换，先前帧中的像素的功能和/或随后的像素的函数将像素分解为高通系数帧。该系统包括运动估计模块，其生成与前一帧和随后帧中的像素相关联的运动矢量。

34. 发明申请

US20060008038A1 Adaptive updates in motion-compensated temporal filtering 有权
公开(公告)号：US20060008038A1
公开(公告)日：2006-01-12
申请号：US11126997
申请日：2005-05-10
申请人： Li Song , Jizheng Xu , Feng Wu
发明人： Li Song , Jizheng Xu , Feng Wu
IPC分类号： H04B1/10
CPC分类号： H04N19/615 , H04N19/124 , H04N19/13 , H04N19/577 , H04N19/61 , H04N19/63
摘要： Techniques and tools are described for scalable video coding and decoding. For example, a video encoder and decoder perform adaptive update operations in lifting-based motion-compensated temporal filtering and inverse motion-compensated temporal filtering, respectively. The encoder, in a prediction stage, computes a motion-compensated prediction for an odd image and computes a high-pass image as the difference between the odd image and the prediction. For an update stage, the encoder performs motion compensation on the high-pass image (and potentially another high-pass image) to compute a motion-compensated update. Based upon perceptual criteria, the encoder adaptively combines the update with an even image to form a low-pass image. The decoder, for an update stage, performs motion compensation on one or more high-pass images to compute a motion-compensated update. Based upon perceptual criteria, the encoder adaptively combines the update with a low-pass image to reconstruct an even frame.

35. 发明申请

US20050190978A1 Barbell lifting for wavelet coding 有权
标题翻译：杠铃提升用于小波编码
公开(公告)号：US20050190978A1
公开(公告)日：2005-09-01
申请号：US10911836
申请日：2004-08-04
申请人： Shipeng Li , Ruiqin Xiong , Lin Luo , Jizheng Xu , Feng Wu
发明人： Shipeng Li , Ruiqin Xiong , Lin Luo , Jizheng Xu , Feng Wu
IPC分类号： G06K9/36 , H04N7/26
CPC分类号： H04N19/635 , H04N19/119 , H04N19/139 , H04N19/61 , H04N19/63
摘要： A method for encoding motion-compensated video data includes generating, for a current frame, a high-pass wavelet coefficient based on a function of pixels in a temporally adjacent frame. The operations are repeated for multiple pixels in an array of pixels in the current frame to form an array of high-pass wavelet coefficients. A low-pass wavelet coefficient is generated based on a function of the high-pass wavelet coefficients. A system for coding video data includes a temporal wavelet decomposition module decomposing a pixel into a high-pass coefficient by performing a discrete wavelet transform on the pixel, a function of pixels in a previous frame, and/or a function of pixels in a subsequent frame. The system includes a motion estimation module generating motion vectors associated with the pixels in the previous frame and in the subsequent frame.
摘要翻译：用于编码运动补偿视频数据的方法包括：基于时间上相邻帧中的像素的函数为当前帧生成高通小波系数。对当前帧中的像素阵列中的多个像素重复操作以形成高通小波系数的阵列。基于高通小波系数的函数产生低通小波系数。用于编码视频数据的系统包括时间小波分解模块，其通过对像素执行离散小波变换，先前帧中的像素的功能和/或随后的像素的函数将像素分解为高通系数帧。该系统包括运动估计模块，其生成与前一帧和随后帧中的像素相关联的运动矢量。

36. 发明授权

US08538177B2 Line and pixel based methods for intra frame coding 有权
标题翻译：用于帧内编码的基于行和像素的方法
公开(公告)号：US08538177B2
公开(公告)日：2013-09-17
申请号：US12847001
申请日：2010-07-30
申请人： Jizheng Xu , Xiulian Peng , Feng Wu
发明人： Jizheng Xu , Xiulian Peng , Feng Wu
IPC分类号： H04N7/50
CPC分类号： H04N19/147 , H04N19/105 , H04N19/176
摘要： Images can be coded based on filters defined by filter coefficients or weights assigned to previously decoded pixel values of nearby lines. The filter coefficients can be selected based on evaluation of a set of predetermined filters, or filters can be adaptively generated and then evaluated. The filters generally are based on pixel values in previous rows or columns, but not values in the current row or column. In some examples, filters are adaptively generated pixel by pixel, or portions of previous rows, columns, or previously decoded portions of the current row or columns are used to provide line templates. A filter is generally selected to reduce coding error based on a least square difference between the current value and a prediction.
摘要翻译：可以基于由分配给附近行的先前解码的像素值的滤波器系数或权重定义的滤波器对图像进行编码。可以基于一组预定滤波器的评估来选择滤波器系数，或者可以自适应地生成滤波器，然后进行评估。过滤器通常基于先前行或列中的像素值，但不是当前行或列中的值。在一些示例中，滤波器被逐个像素自适应地生成，或者使用当前行或列的先前行，列或先前解码的部分的部分来提供行模板。通常选择滤波器以基于当前值和预测之间的最小平方差来减少编码误差。

37. 发明授权

US08243812B2 Barbell lifting for wavelet coding 有权
标题翻译：杠铃提升用于小波编码
公开(公告)号：US08243812B2
公开(公告)日：2012-08-14
申请号：US12503582
申请日：2009-07-15
申请人： Shipeng Li , Ruiqin Xiong , Lin Luo , Jizheng Xu , Feng Wu
发明人： Shipeng Li , Ruiqin Xiong , Lin Luo , Jizheng Xu , Feng Wu
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04
CPC分类号： H04N19/635 , H04N19/119 , H04N19/139 , H04N19/61 , H04N19/63
摘要： A method for encoding motion-compensated video data includes generating, for a current frame, a high-pass wavelet coefficient based on a function of pixels in a temporally adjacent frame. The operations are repeated for multiple pixels in an array of pixels in the current frame to form an array of high-pass wavelet coefficients. A low-pass wavelet coefficient is generated based on a function of the high-pass wavelet coefficients. A system for coding video data includes a temporal wavelet decomposition module decomposing a pixel into a high-pass coefficient by performing a discrete wavelet transform on the pixel, a function of pixels in a previous frame, and/or a function of pixels in a subsequent frame. The system includes a motion estimation module generating motion vectors associated with the pixels in the previous frame and in the subsequent frame.
摘要翻译：用于编码运动补偿视频数据的方法包括：基于时间上相邻帧中的像素的函数为当前帧生成高通小波系数。对当前帧中的像素阵列中的多个像素重复操作以形成高通小波系数的阵列。基于高通小波系数的函数产生低通小波系数。用于编码视频数据的系统包括时间小波分解模块，其通过对像素执行离散小波变换，先前帧中的像素的功能和/或随后的像素的函数将像素分解为高通系数帧。该系统包括运动估计模块，其生成与前一帧和随后帧中的像素相关联的运动矢量。

38. 发明申请

US20120076414A1 External Image Based Summarization Techniques 审中-公开
标题翻译：基于外部图像的汇总技术
公开(公告)号：US20120076414A1
公开(公告)日：2012-03-29
申请号：US12891552
申请日：2010-09-27
申请人： Jizheng Xu , Binxing Jiao , Feng Wu
发明人： Jizheng Xu , Binxing Jiao , Feng Wu
IPC分类号： G06K9/34 , G06F17/30
CPC分类号： G06F16/50 , G06F16/9038 , G06K9/00677
摘要： Techniques involve visually summarizing documents (e.g., search results, a collection of documents, etc.) using images which are visually representative of the documents for which the images represent. The images representing the documents may be external images obtained from sources other than the documents. The external images may be obtained from the sources other than the documents by performing a separate image based search using key phrases from the documents rather than extracting the images directly from within the documents themselves. Alternatively, an algorithm may be used to determine an image type, which may be chosen from a selection of external images, thumbnail images, or internal imaged taken directly from the collection of documents, that is suited to represent each document in the collection of documents. A snippet of the documents may be displayed along with the images which visually represent each of the documents.
摘要翻译：技术涉及使用视觉上代表图像所代表的文档的图像来可视地总结文档（例如，搜索结果，文档集合等）。表示文件的图像可以是从文档之外的源获得的外部图像。外部图像可以通过使用文档中的关键短语执行单独的图像搜索而不是从文档之外的来源获得，而不是直接从文档本身中提取图像。或者，可以使用算法来确定图像类型，其可以从外部图像的选择，缩略图图像或直接从文档集合中获取的内部图像中选择，其适于表示文档集合中的每个文档。文档的片段可以与可视地表示每个文档的图像一起显示。

39. 发明授权

US07860161B2 Enhancement layer transcoding of fine-granular scalable video bitstreams 有权
标题翻译：细粒度可缩放视频比特流的增强层转码
公开(公告)号：US07860161B2
公开(公告)日：2010-12-28
申请号：US10736955
申请日：2003-12-15
申请人： Jizheng Xu , Feng Wu , Shipeng Li
发明人： Jizheng Xu , Feng Wu , Shipeng Li
IPC分类号： H04N7/12 , H04N7/28 , H04N7/01 , H04N7/50
CPC分类号： H04N19/34 , H04N19/149 , H04N19/164 , H04N19/187 , H04N19/40
摘要： Systems and methods for enhancement layer transcoding of fine-granular scalable video bitstreams are described. In one aspect, an enhancement layer bitstream is decoded from encoded video data. The encoded video data includes a base layer and one or more enhancement layers. The encoded video data is encoded according to a high HQRB (high quality reference bit-rate). Data throughput characteristics of a network coupled to a client computing device are determined. A new HQRB is calculated based on the data throughput characteristics. The decoded enhancement layer bitstream is then encoded based on the new HQRB to generate a transcoded enhancement layer for streaming to the client computing device. The base layer is not decoded for streaming to the client computing device.
摘要翻译：描述了细粒度可分级视频比特流的增强层转码的系统和方法。在一个方面，从编码视频数据解码增强层比特流。编码视频数据包括基本层和一个或多个增强层。编码的视频数据根据高HQRB（高质量参考比特率）进行编码。确定耦合到客户端计算设备的网络的数据吞吐量特性。基于数据吞吐量特性计算新的HQRB。然后，基于新的HQRB对解码的增强层比特流进行编码，以生成用于流式传输到客户端计算设备的转码增强层。基本层未被解码用于流传送到客户端计算设备。

40. 发明申请

US20100020882A1 Barbell Lifting for Wavelet Coding 有权
标题翻译：杠铃提升小波编码
公开(公告)号：US20100020882A1
公开(公告)日：2010-01-28
申请号：US12503582
申请日：2009-07-15
申请人： Shipeng Li , Ruiqin Xiong , Lin Luo , Jizheng Xu , Feng Wu
发明人： Shipeng Li , Ruiqin Xiong , Lin Luo , Jizheng Xu , Feng Wu
IPC分类号： H04N7/30
CPC分类号： H04N19/635 , H04N19/119 , H04N19/139 , H04N19/61 , H04N19/63
摘要： A method for encoding motion-compensated video data includes generating, for a current frame, a high-pass wavelet coefficient based on a function of pixels in a temporally adjacent frame. The operations are repeated for multiple pixels in an array of pixels in the current frame to form an array of high-pass wavelet coefficients. A low-pass wavelet coefficient is generated based on a function of the high-pass wavelet coefficients. A system for coding video data includes a temporal wavelet decomposition module decomposing a pixel into a high-pass coefficient by performing a discrete wavelet transform on the pixel, a function of pixels in a previous frame, and/or a function of pixels in a subsequent frame. The system includes a motion estimation module generating motion vectors associated with the pixels in the previous frame and in the subsequent frame.
摘要翻译：用于编码运动补偿视频数据的方法包括：基于时间上相邻帧中的像素的函数为当前帧生成高通小波系数。对当前帧中的像素阵列中的多个像素重复操作以形成高通小波系数的阵列。基于高通小波系数的函数产生低通小波系数。用于编码视频数据的系统包括时间小波分解模块，其通过对像素执行离散小波变换，先前帧中的像素的功能和/或随后的像素的函数将像素分解为高通系数帧。该系统包括运动估计模块，其生成与前一帧和随后帧中的像素相关联的运动矢量。

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