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71. 发明申请

US20210215789A1 METHOD, APPARATUS, AND SYSTEM FOR WIRELESS PROXIMITY SENSING 有权
公开(公告)号：US20210215789A1
公开(公告)日：2021-07-15
申请号：US17214841
申请日：2021-03-27
申请人： Yuqian Hu , Beibei Wang , Muhammed Zahid Ozturk , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au , Xiaolu Zeng , Chenshu Wu , Fengyu Wang
发明人： Yuqian Hu , Beibei Wang , Muhammed Zahid Ozturk , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au , Xiaolu Zeng , Chenshu Wu , Fengyu Wang
IPC分类号： G01S7/00 , G01S13/00 , G01S13/56 , G01S7/41
摘要： Methods, apparatus and systems for wireless proximity sensing are described. In one example, a described system comprises: a transmitter configured for transmitting a first wireless signal through a wireless multipath channel of a venue; a receiver configured for receiving a second wireless signal through the wireless multipath channel; and a processor. The second wireless signal differs from the first wireless signal due to the wireless multipath channel that is impacted by a movement of an object in the venue. The processor is configured for: obtaining a time series of channel information (TSCI) of the wireless multipath channel based on the second wireless signal, wherein each channel information (CI) of the TSCI comprises a plurality of CI components, each of which is associated with an index; computing an inter-component statistics based on the plurality of CI components; computing, based on the inter-component statistics, a proximity information of the object with respect to a reference location in the venue; and performing a task based on the proximity information of the object.

72. 发明授权

US11025475B2 Method, apparatus, server, and systems of time-reversal technology 有权
公开(公告)号：US11025475B2
公开(公告)日：2021-06-01
申请号：US15861422
申请日：2018-01-03
申请人： K. J. Ray Liu , Hung-Quoc Duc Lai , Beibei Wang , Chen Chen , Oscar Chi-Lim Au
发明人： K. J. Ray Liu , Hung-Quoc Duc Lai , Beibei Wang , Chen Chen , Oscar Chi-Lim Au
IPC分类号： H04L27/36 , H04W72/04 , H04B1/38 , H04L27/34
摘要： The present teaching relates to collecting and processing location-specific wireless waveforms for use in wireless communication, components, methods, apparatuses, servers, and systems. In one embodiment, a disclosed system comprises a first wireless transceiver of a first device, and at least one second wireless transceiver of at least one second device. The first wireless transceiver of the first device is wirelessly coupled to the at least one second wireless transceiver through a wireless multipath channel associated with a space. The first device with the first wireless transceiver comprises a processor and a memory, which are configured to obtain a set of channel information (CI) and perform a task associated with the space based on the set of channel information. The set of channel information is captured when at least one probing signal is either (1) sent from the first wireless transceiver to a particular second wireless transceiver through the wireless multipath channel associated with the space, or (2) sent from the particular second wireless transceiver to the first wireless transceiver through the wireless multipath channel. The set of CI comprises a channel impulse response, a channel frequency response, a channel profile, and/or another channel data of the wireless multipath channel.

73. 发明授权

US11012285B2 Methods, apparatus, servers, and systems for vital signs detection and monitoring 有权
公开(公告)号：US11012285B2
公开(公告)日：2021-05-18
申请号：US16127151
申请日：2018-09-10
申请人： Chen Chen , Beibei Wang , Yi Han , Feng Zhang , Hung-Quoc Duc Lai , Yan Chen , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Chen Chen , Beibei Wang , Yi Han , Feng Zhang , Hung-Quoc Duc Lai , Yan Chen , K. J. Ray Liu , Oscar Chi-Lim Au
IPC分类号： H04L27/36 , H04W72/04 , H04B1/38 , H04L5/00
摘要： The present teaching relates to vital sign detection and monitoring based on channel state information (CSI). In one example, an apparatus for vital sign detection is disclosed. The apparatus comprises a receiver, a processor and a memory communicatively coupled with the processor. The receiver is configured for receiving at least one wireless signal from a multipath channel that can be impacted by a vital sign of at least one living being. The processor is configured for: extracting a time series of channel state information (CSI) for the multipath channel from the at least one wireless signal, obtaining one or more periodic fluctuations based on a spectral analysis of the time series of CSI, and determining whether the vital sign is present based on the one or more periodic fluctuations.

74. 发明授权

US08712153B2 Subpixel-based image down-sampling 失效
标题翻译：基于子像素的图像下采样
公开(公告)号：US08712153B2
公开(公告)日：2014-04-29
申请号：US13043703
申请日：2011-03-09
申请人： Oscar Chi Lim Au , Lu Fang
发明人： Oscar Chi Lim Au , Lu Fang
IPC分类号： G06K9/34
CPC分类号： G06T3/4023
摘要： Systems, methods, and apparatus for sampling images using minimum mean square error subpixel-based down-sampling (MMSE-SD) are presented herein. A partition component can receive a first array of pixels, and divide the first array of pixels into two-dimensional (2-D) blocks of pixels. Further, a sampling component can diagonally down-sample subpixels of a block of the 2-D blocks, and generate a second array of pixels based on the down-sampled subpixels. The sampling component can alternately sample subpixels of adjacent pixels of the block in a diagonal direction, and generate the second array of pixels based on the subpixels. A reconstruction component can create a virtual image based on, at least in part, the second array of pixels. A MMSE-SD component can determine an optimal low resolution image based on, at least in part, respective color components of the virtual image and a high resolution image associated with the first array of pixels.
摘要翻译：本文给出了使用最小均方误差子像素的下采样（MMSE-SD）采样图像的系统，方法和装置。分区组件可以接收第一像素阵列，并且将第一像素阵列划分为二维（2-D）像素块。此外，采样分量可以对角地对2-D块的块的子像素进行下采样，并且基于下采样子像素生成第二像素阵列。采样分量可以交替地在对角线方向上对块的相邻像素的子像素进行采样，并且基于子像素生成第二像素阵列。至少部分地基于第二像素阵列来创建虚拟图像。 MMSE-SD组件可以至少部分地基于虚拟图像的相应颜色分量和与第一像素阵列相关联的高分辨率图像来确定最佳低分辨率图像。

75. 发明授权

US08682094B2 Adaptive subpixel-based downsampling and filtering using edge detection 失效
标题翻译：使用边缘检测的基于子像素的自适应下采样和滤波
公开(公告)号：US08682094B2
公开(公告)日：2014-03-25
申请号：US12778584
申请日：2010-05-12
申请人： Oscar Chi Lim Au , Lu Fang
发明人： Oscar Chi Lim Au , Lu Fang
IPC分类号： G06K9/40 , G06K9/32 , G06K9/48
CPC分类号： G09G5/026 , G09G2360/02
摘要： Systems, methods, and apparatus for sampling images using edge detection are presented herein. A gradient component can calculate at least one gradient of a luminance of a block of pixels based on at least one direction; and select a minimum gradient of the at least one gradient of the luminance. Further, a direction component can determine a direction of the block based on a direction of the minimum gradient of the at least one gradient of the luminance. Moreover, a sampling component can alternately select subpixels of the block based on the direction of the block. In addition, a filter component can calculate at least one gradient of a color of a subpixel of the subpixels based on the at least one direction; determine a direction of the subpixel based on the at least one gradient of the color; and filter the subpixels based on the direction of the subpixel.
摘要翻译：本文给出了使用边缘检测对图像采样的系统，方法和装置。梯度分量可以基于至少一个方向计算像素块的亮度的至少一个梯度; 并选择亮度的至少一个梯度的最小梯度。此外，方向分量可以基于亮度的至少一个梯度的最小梯度的方向来确定块的方向。此外，采样分量可以基于块的方向交替地选择块的子像素。此外，滤波器组件可以基于至少一个方向计算子像素的子像素的颜色的至少一个梯度; 基于颜色的至少一个梯度来确定子像素的方向; 并且基于子像素的方向对子像素进行滤波。

76. 发明授权

US07986441B2 Embedding watermark into halftone image with low distortion using parity values for overlapping groups of candidate sites 有权
标题翻译：将水印嵌入具有低失真的半色调图像中，使用候选位置重叠组的奇偶校验值
公开(公告)号：US07986441B2
公开(公告)日：2011-07-26
申请号：US12060949
申请日：2008-04-02
申请人： Oscar Chi Lim Au , Richard Yuk Ming Li
发明人： Oscar Chi Lim Au , Richard Yuk Ming Li
IPC分类号： H04N1/405 , H04N1/409 , B41M3/10
CPC分类号： H04N1/32203 , G06T1/0028 , G06T2201/0051 , G06T2201/0061 , H04N1/32229 , H04N1/32256 , H04N2201/3233 , H04N2201/327
摘要： System and methodologies are provided herein for low-distortion image watermarking. Parity relationships between multiple pixels and/or regions of an image can be leveraged as described herein to reduce the amount of toggling required to embed a watermark in an image, thereby increasing watermark efficiency and reducing visual artifacts introduced in a watermarked image. Various algorithms for leveraging parity relationships are described herein, including a Block-Overlapping Parity Check (BOPC) algorithm, a Champagne Pyramid Parity Check (CPPC) algorithm, and a Tree-Based Parity Check (TBPC) algorithm.
摘要翻译：本文提供了用于低失真图像水印的系统和方法。可以如本文所述利用图像的多个像素和/或区域之间的奇偶校验关系来减少在图像中嵌入水印所需的切换量，从而增加水印效率并减少在水印图像中引入的视觉伪影。本文描述了用于利用奇偶校验关系的各种算法，包括块重叠奇偶校验（BOPC）算法，香槟金字塔奇偶校验（CPPC）算法和基于树的奇偶校验（TBPC）算法。

77. 发明申请

US20100074333A1 Method and system for transcoding based robust streaming of compressed video 有权
标题翻译：用于基于压缩视频的强健流媒体转码的方法和系统
公开(公告)号：US20100074333A1
公开(公告)日：2010-03-25
申请号：US12555591
申请日：2009-09-08
申请人： Oscar Chi Lim Au , Xiaopeng Fan
发明人： Oscar Chi Lim Au , Xiaopeng Fan
IPC分类号： H04N7/32
CPC分类号： H04N19/577 , H04N19/40 , H04N19/51 , H04N19/89
摘要： Described herein is a novel transcoding technique called lossless inter frame transcoding (LIFT) for improving the error resilience of video streaming. According to various embodiments, conventional coded blocks are selectively transcoded into new transcoded block. At the decoder, the transcoded block can be transcoded back to the conventional coded block when the prediction is available and can also be robustly decoded independently when the prediction is unavailable. According to another embodiment, an offline transcoding and online composing technique is provided for generating a composite frame using the transcoded and conventional coded blocks and adjusting the ratio of the transcoded blocks, thereby achieving error robustness scalability.
摘要翻译：这里描述了一种用于改善视频流的错误弹性的新颖的代码转换技术，称为无损帧间转码（LIFT）。根据各种实施例，常规编码块被选择性地转码成新的转码块。在解码器中，当预测可用时，代码转换的块可以被代码转换回传统的编码块，并且当预测不可用时也可以独立地强制解码。根据另一个实施例，提供了一种离线代码转换和在线编组技术，用于使用代码转换和常规编码块来生成复合帧，并调整转码块的比率，从而实现误差鲁棒性可扩展性。

78. 发明申请

US20100027909A1 CONVEX OPTIMIZATION APPROACH TO IMAGE DEBLOCKING 审中-公开
标题翻译： CONVEX优化图像去除方法
公开(公告)号：US20100027909A1
公开(公告)日：2010-02-04
申请号：US12185162
申请日：2008-08-04
申请人： Oscar Chi Lim Au , Liwei Guo
发明人： Oscar Chi Lim Au , Liwei Guo
IPC分类号： G06K9/40
CPC分类号： H04N19/86
摘要： Images encoded at low-bit rate may suffer from blocking artifacts, which can dramatically degrade the visual quality of the images. In accordance with the claimed subject matter, a convex optimization approach is provided in order to mitigate such blocking artifacts. Based on the analysis of image coding process as well as natural image properties (e.g., image complexity), a set of constraint functions can be constructed. In addition, an objective function can be constructed based upon, e.g. analysis of a quantization noise model. All functions included in the set as well as the objective function can be convex function. Accordingly, image deblocking can be formulated as a convex optimization problem which can be easily solved using numerical methods. Moreover, the feasibility of the convex optimization problem can be utilized to detect the true object edges and avoid blurring.
摘要翻译：以低比特率编码的图像可能遭受阻塞伪影，这可能显着降低图像的视觉质量。根据所要求保护的主题，提供凸优化方法以减轻这种块伪影。基于图像编码处理以及自然图像属性（例如，图像复杂度）的分析，可以构建一组约束函数。另外，目标函数可以基于例如，量化噪声模型的分析。集合中包含的所有函数以及目标函数都可以是凸函数。因此，图像去块可以被形成为可以使用数值方法容易地求解的凸优化问题。此外，凸优化问题的可行性可以用于检测真实物体边缘并避免模糊。

79. 发明申请

US20100020877A1 MULTIPLE REFERENCE FRAME MOTION ESTIMATION IN VIDEO CODING 审中-公开
标题翻译：视频编码中的多参考帧运动估计
公开(公告)号：US20100020877A1
公开(公告)日：2010-01-28
申请号：US12178337
申请日：2008-07-23
申请人： Oscar Chi Lim Au , Man Cheung Kung
发明人： Oscar Chi Lim Au , Man Cheung Kung
IPC分类号： H04N11/02
CPC分类号： H04N19/577 , H04N19/436 , H04N19/51 , H04N19/52 , H04N19/573 , H04N19/61
摘要： Multiple reference frame motion estimation for video frame blocks is provided. A plurality of copies of a block list of a reference frame can be loaded into texture memory. Encoding of video blocks of the video frame can be ordered to allow concurrent encoding of the video blocks. Furthermore, motion vector prediction can be performed concurrently for independent video blocks, the motion vectors can be related to each one of the plurality of copies of the block list of the reference frame and determined for the at least a portion of the plurality of blocks ordered for concurrent encoding. Additionally, a fast motion estimation algorithm can be concurrently performed on a number of video blocks to search surrounding blocks and compute motion vectors. Further, concurrent processing of multiple slices can be performed. Such concurrent processes can leverage the parallel architecture of at least one graphical processing unit.
摘要翻译：提供了视频帧块的多参考帧运动估计。参考帧的块列表的多个副本可以被加载到纹理存储器中。视频帧的视频块的编码可以被排序以允许视频块的并发编码。此外，可以针对独立视频块同时执行运动矢量预测，运动矢量可以与参考帧的块列表的多个副本中的每一个相关，并且针对订购的多个块的至少一部分确定用于并发编码。另外，可以对多个视频块同时执行快速运动估计算法来搜索周围的块并计算运动矢量。此外，可以执行多个片的并发处理。这种并发处理可以利用至少一个图形处理单元的并行架构。

80. 发明申请

US20090103617A1 EFFICIENT ERROR RECOVERY WITH INTRA-REFRESH 审中-公开
标题翻译：有效的错误恢复与内部修复
公开(公告)号：US20090103617A1
公开(公告)日：2009-04-23
申请号：US11876026
申请日：2007-10-22
申请人： Oscar Chi Lim Au , Mengyao Ma
发明人： Oscar Chi Lim Au , Mengyao Ma
IPC分类号： H04N7/26
CPC分类号： H04N19/107 , H04N19/164 , H04N19/172 , H04N19/176 , H04N19/182 , H04N19/48 , H04N19/51 , H04N19/61 , H04N19/895
摘要： Systems and methodologies for concealing errors related to INTRA-frame losses in a transmitted video signal are provided herein. Systems and methodologies provided herein can refine a lost INTRA-coded frame and its subsequent INTER-coded frames using INTRA-coded macroblocks that are provided in a video bitstream in accordance with a Random INTRA Refresh (RIR) scheme. When an INTRA-frame is lost, INTRA-coded macroblocks can be used to refine neighboring INTER-coded macroblocks based on region filling, spatial interpolation, or other algorithms that are based on the strong correlation between values of adjacent pixels in a video signal. Further, motion compensation can be used to refine an INTER-coded pixel having an INTRA-coded pixel in its motion trajectory.
摘要翻译：本文提供了用于隐藏与发送的视频信号中的INTRA帧丢失有关的错误的系统和方法。本文提供的系统和方法可以使用根据随机INTRA刷新（RIR）方案在视频比特流中提供的INTRA编码的宏块来细化丢失的INTRA编码帧及其随后的INTER编码帧。当INTRA帧丢失时，INTRA编码的宏块可以用于基于区域填充，空间插值或基于视频信号中相邻像素的值之间的强相关性的其他算法来细化相邻的INTER编码宏块。此外，可以使用运动补偿来细化其运动轨迹中具有INTRA编码像素的INTER编码像素。

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