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41. 发明授权

US11340328B2 Method, apparatus, and system for wireless vital monitoring using high frequency signals 有权
公开(公告)号：US11340328B2
公开(公告)日：2022-05-24
申请号：US17214838
申请日：2021-03-27
申请人： Fengyu Wang , Beibei Wang , Xiaolu Zeng , Chenshu Wu , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Fengyu Wang , Beibei Wang , Xiaolu Zeng , Chenshu Wu , K. J. Ray Liu , Oscar Chi-Lim Au
IPC分类号： G01S7/00 , G01S13/00 , G01S13/56 , G01S7/41 , H04W84/18
摘要： Methods, apparatus and systems for wireless vital monitoring are described. In one example, a described system comprises: a transmitter configured for transmitting a first wireless signal through a wireless channel of a venue; a receiver configured for receiving a second wireless signal through the wireless channel; and a processor. The second wireless signal comprises a reflection of the first wireless signal by at least one living being having at least one repetitive motion in the venue. The processor is configured for: obtaining a time series of channel information (TSCI) of the wireless channel based on the second wireless signal; generating, for each living being of the at least one living being, a vital signal representing all repetitive motions of the living being based on the TSCI; extracting, from the vital signal of each living being, a heartbeat signal; and monitoring, for each living being in the venue, a heart rate variability based on the heartbeat signal.

42. 发明申请

US20220096003A1 METHOD, APPARATUS, AND SYSTEM FOR AUTOMATIC AND ADAPTIVE WIRELESS MONITORING AND TRACKING 有权
公开(公告)号：US20220096003A1
公开(公告)日：2022-03-31
申请号：US17537432
申请日：2021-11-29
申请人： Chao-Lun Mai , Jeng-Feng Lee , Hung-Quoc Duc LAI , Dan Bugos , Hangfang Zhang , Beibei Wang , Oscar Chi-Lim Au , K. J. Ray Liu
发明人： Chao-Lun Mai , Jeng-Feng Lee , Hung-Quoc Duc LAI , Dan Bugos , Hangfang Zhang , Beibei Wang , Oscar Chi-Lim Au , K. J. Ray Liu
IPC分类号： A61B5/00 , H04B1/713 , H04L25/02 , A61B5/08
摘要： Methods, apparatus and systems for wireless monitoring and tracking are described. In one example, a described method of a wireless monitoring system comprises: transmitting a wireless signal that is impacted by a wireless multipath channel in a venue and a modulation of an object undergoing a motion in the venue, to obtain a set of channel information (CI) of the wireless multipath channel; performing a monitoring task by monitoring the object and the motion; determining a plurality of admissible system states of the wireless monitoring system, wherein each admissible system state is associated with a respective setting of at least one of: the wireless signal, a series of sounding signals in the wireless signal, or the monitoring task; choosing one of the admissible system states to be a system state of the wireless monitoring system based on the monitoring task; and applying a setting associated with the chosen admissible system state to the wireless monitoring system.

43. 发明申请

US20220026530A1 METHOD, APPARATUS, AND SYSTEM FOR HUMAN RECOGNITION BASED ON GAIT FEATURES 有权
公开(公告)号：US20220026530A1
公开(公告)日：2022-01-27
申请号：US17492599
申请日：2021-10-02
申请人： Chenshu Wu , Beibei Wang , K.J. Ray Liu , Oscar Chi-Lim Au
发明人： Chenshu Wu , Beibei Wang , K.J. Ray Liu , Oscar Chi-Lim Au
IPC分类号： G01S7/41 , H04W4/02 , G01S7/35 , G01S13/58
摘要： Methods, apparatus and systems for human recognition based on one or more gait features detected wirelessly are described. In one example, a described system comprises: a transmitter configured to transmit a first wireless signal through a wireless channel of a venue; a receiver configured to receive a second wireless signal through the wireless channel, wherein the second wireless signal comprises a reflection of the first wireless signal by at least one object in the venue; and a processor. The processor is configured for: obtaining a time series of channel information (CI) of the wireless channel based on the second wireless signal, determining a presence of a person moving in the venue based on the time series of CI (TSCI), extracting at least one gait feature of the person from the TSCI, and recognizing an identity of the person based on the at least one gait feature.

44. 发明授权

US11202215B2 Method, apparatus, and system for providing automatic assistance based on wireless monitoring 有权
公开(公告)号：US11202215B2
公开(公告)日：2021-12-14
申请号：US17113024
申请日：2020-12-05
申请人： Masato Marumo , Beibei Wang , Oscar Chi-Lim Au , Hung-Quoc Duc Lai , K. J. Ray Liu
发明人： Masato Marumo , Beibei Wang , Oscar Chi-Lim Au , Hung-Quoc Duc Lai , K. J. Ray Liu
IPC分类号： H04W24/02
摘要： Methods, apparatus and systems for providing automatic assistance based on wireless monitoring are described. In one example, a described automatic assistant system comprises: a transmitter, a receiver, a processor, and an assistant device. The transmitter is configured for transmitting a first wireless signal through a wireless multipath channel of a venue. The receiver is configured for receiving a second wireless signal through the wireless multipath channel. The second wireless signal differs from the first wireless signal due to the wireless multipath channel that is impacted by a motion 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, and monitoring the motion of the object in the venue based on the TSCI. The assistant device is configured for generating an assistance with respect to the object in the venue based on the monitoring.

45. 发明申请

US20210190702A1 METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MATERIAL SENSING 有权
公开(公告)号：US20210190702A1
公开(公告)日：2021-06-24
申请号：US17180760
申请日：2021-02-20
申请人： Chenshu Wu , Beibei Wang , Oscar Chi-Lim Au , Feng Zhang , K. J. Ray Liu
发明人： Chenshu Wu , Beibei Wang , Oscar Chi-Lim Au , Feng Zhang , K. J. Ray Liu
IPC分类号： G01N22/00
摘要： Methods, apparatus and systems for wireless material sensing are described. In one example, a described system comprises: a transmitter configured for transmitting, using transmit antennas, a first wireless signal through a wireless multipath channel of a venue; a receiver configured for receiving, using receive antennas, a second wireless signal through the wireless multipath channel; and a processor. The second wireless signal comprises a reflection or a refraction of the first wireless signal at a surface of a target material of an object in the venue. The processor is configured for: obtaining a plurality of channel information (CI) of the wireless multipath channel based on the second wireless signal, wherein each CI is associated with a respective transmit antenna and a respective receive antenna; computing a material analytics based on the plurality of CI; and determining a type of the target material of the object based on the material analytics.

46. 发明申请

US20210091866A1 METHOD, APPARATUS, AND SYSTEM FOR ACCURATE WIRELESS MONITORING 有权
公开(公告)号：US20210091866A1
公开(公告)日：2021-03-25
申请号：US17113023
申请日：2020-12-05
申请人： Feng Zhang , Beibei Wang , Hung-Quoc Duc Lai , Oscar Chi-Lim Au , K. J. Ray Liu
发明人： Feng Zhang , Beibei Wang , Hung-Quoc Duc Lai , Oscar Chi-Lim Au , K. J. Ray Liu
IPC分类号： H04B17/309
摘要： Methods, apparatus and systems for improving accuracy and efficiency of wireless monitoring are described. In one example, a described method comprises: transmitting a first wireless signal from a first wireless device with transmit antennas through a wireless multipath channel of a venue; receiving a second wireless signal by a second wireless device with receive antennas through the wireless multipath channel, wherein the second wireless signal differs from the first wireless signal due to the wireless multipath channel that is impacted by a motion of an object in the venue; obtaining a number of time series of channel information (TSCI) of the wireless multipath channel based on the second wireless signal, wherein each TSCI is associated with a respective one of the transmit antennas and a respective one of the receive antennas; preprocessing the number of TSCI; and monitoring the motion of the object based on the number of preprocessed TSCI.

47. 发明授权

US08982947B2 Rate control and video denoising for noisy video data 有权
公开(公告)号：US08982947B2
公开(公告)日：2015-03-17
申请号：US12219375
申请日：2008-07-21
申请人： Oscar Chi Lim Au , Yan Chen
发明人： Oscar Chi Lim Au , Yan Chen
IPC分类号： H04N7/12 , H04N19/176 , H04N19/147 , H04N19/61 , H04N19/124
CPC分类号： H04N19/00278 , H04N19/124 , H04N19/147 , H04N19/176 , H04N19/61
摘要： A method and a computer-readable medium containing computer program for simultaneously performing rate control and video denoising for video corrupted by noise are presented. Video data includes original video data and noise data. A variance of the noise data for each macroblock within a frame is estimated. Based on the estimated noise variance, a low bound quantization parameter is generated. The video data are reconstructed such that the distortion between the original video data and reconstructed video data is minimized over each macroblock within a frame. The minimization of the distortion between the original video and reconstructed video data is implemented using a quantization parameter that is equal to or larger than the low bound quantization parameter.

48. 发明授权

US08650402B2 General data hiding framework using parity for minimal switching 有权
标题翻译：一般数据隐藏框架使用奇偶校验最小化切换
公开(公告)号：US08650402B2
公开(公告)日：2014-02-11
申请号：US12190962
申请日：2008-08-13
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： H04L9/32
CPC分类号： H04N1/32203 , G06T1/0028 , G06T2201/0051 , G06T2201/0061 , H04N1/32208 , H04N1/32229 , H04N1/32256 , H04N1/32261 , H04N1/32336 , H04N2201/3233 , H04N2201/327
摘要： A framework is provided for reducing the number of locations modified when hiding data, such as a digital watermark, in binary data. The framework complements data hiding techniques, such as digital watermarking techniques. After determining potential embedding locations according to an underlying technique, a data structure is created with values associated with those locations. A parity calculation is performed on the values in the data structure. The calculated parity is compared with hidden data to determine locations for modifications. Manipulations are then performed to reduce the total number of modifications needed to represent the hidden data. Modifications are made to the binary data according to the underlying technique. During decoding of the hidden data, the same locations can be determined, the same data structure can be created with the modified values, and a parity calculation is then performed to decode the hidden data.
摘要翻译：提供了一种框架，用于减少在二进制数据中隐藏诸如数字水印之类的数据时修改的位置的数量。该框架补充了数字隐藏技术，如数字水印技术。根据底层技术确定潜在的嵌入位置后，将创建一个与这些位置相关联的值的数据结构。对数据结构中的值执行奇偶校验计算。将计算的奇偶校验与隐藏数据进行比较，以确定修改的位置。然后执行操作以减少表示隐藏数据所需的修改总数。根据底层技术对二进制数据进行修改。在隐藏数据的解码期间，可以确定相同的位置，可以用修改的值创建相同的数据结构，然后执行奇偶校验计算以对隐藏的数据进行解码。

49. 发明授权

US08625676B2 Video bitstream decoding using least square estimates 有权
标题翻译：使用最小平方估计的视频比特流解码
公开(公告)号：US08625676B2
公开(公告)日：2014-01-07
申请号：US12147545
申请日：2008-06-27
申请人： Oscar Chi Lim Au , Zhiqin Liang
发明人： Oscar Chi Lim Au , Zhiqin Liang
IPC分类号： H04N7/26
CPC分类号： H04N21/2343 , H04N19/126 , H04N19/14 , H04N19/147 , H04N19/159 , H04N19/176 , H04N19/40 , H04N19/61 , H04N21/23608 , H04N21/2662 , H04N21/4382 , H04N21/440254 , H04N21/4425
摘要： System and methodologies are provided herein for reconstructing a video signal from multiple video streams. Various aspects described herein can utilize a least square estimate (LSE) algorithm to jointly decode multiple video bitstreams that are generated from a common original video sequence at different bit rates. As described herein, the LSE algorithm can reconstruct an original video sequence by determining and computing a weighted sum of collocated video information reconstructed from different video bitstreams. The weights applied can be adaptively determined to minimize the mean square error (MSE) of the reconstructed video sequence as compared to the original.
摘要翻译：本文提供了用于重建来自多个视频流的视频信号的系统和方法。本文描述的各个方面可以利用最小二乘估计（LSE）算法来共同解码从不同比特率的公共原始视频序列生成的多个视频比特流。如本文所述，LSE算法可以通过确定和计算从不同视频比特流重建的并置视频信息的加权和重建原始视频序列。施加的权重可以被自适应地确定，以将重建的视频序列的均方误差（MSE）与原始图像相比最小化。

50. 发明授权

US08254469B2 Error concealment for frame loss in multiple description coding 有权
标题翻译：错误隐藏在多描述编码中的帧丢失
公开(公告)号：US08254469B2
公开(公告)日：2012-08-28
申请号：US12116731
申请日：2008-05-07
申请人： Oscar Chi Lim Au , Mengyao Ma
发明人： Oscar Chi Lim Au , Mengyao Ma
IPC分类号： H04B1/66 , H04N7/12 , H04N11/02 , H04N11/04
CPC分类号： H04N19/39 , H04N19/577 , H04N19/61 , H04N19/895
摘要： Systems and methodologies for concealing frame loss in a video transmission environment are provided herein. Multiple Description Coding (MDC) can be used as an Error Resilience technique for video coding. In case of transmission errors, Error Concealment can be combined with MDC to reconstruct a lost frame, such that the propagated error to following frames can be reduced. Further, multi-hypothesis decoding can be employed to enhance reconstructed video quality of MDC over packet loss networks. For instance, one or more frames after the lost frame in the same stream can be reconstructed using multi-hypothesis decoding, which combines directly decoding and temporally interpolating these frames. Moreover, output obtained from directly decoding and temporally interpolating each frame can be combined by generating a weighted sum of these hypotheses. Constant weights and/or adaptive weights (e.g., determined based on the minimum mean square error criterion) can be used for yielding the weighted sum.
摘要翻译：本文提供了在视频传输环境中隐藏帧丢失的系统和方法。多描述编码（MDC）可用作视频编码的错误恢复技术。在传输错误的情况下，可以将错误隐藏与MDC组合以重构丢失帧，从而可以减少对后续帧的传播错误。此外，可以采用多假设解码来提高MDC在分组丢失网络上的重构视频质量。例如，可以使用多假设解码重构相同流中丢失帧之后的一个或多个帧，其结合直接解码和时间内插这些帧。此外，可以通过生成这些假设的加权和来组合从直接解码获得的输出和时间内插每个帧。常数权重和/或自适应权重（例如，基于最小均方误差准则确定）可用于产生加权和。

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