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公开(公告)号：US07720148B2
公开(公告)日：2010-05-18
申请号：US11090373
申请日：2005-03-25
申请人： Oscar Chi-Lim Au , Andy Chang
发明人： Oscar Chi-Lim Au , Andy Chang
IPC分类号： H04N7/12
CPC分类号： H04N19/573
摘要： There is disclosed a method of digital signal compression, coding and representation, and more particularly a method of video compression, coding and representation system that uses multi-frame motion estimation and includes both device and method aspects. The invention also provides a computer program product, such as a recording medium, carrying program instructions readable by a computing device to cause the computing device to carry out a method according to the invention.
摘要翻译： 公开了一种数字信号压缩，编码和表示的方法，特别是使用多帧运动估计的视频压缩，编码和表示系统的方法，包括设备和方法两个方面。 本发明还提供了诸如记录介质的计算机程序产品，其携带由计算设备可读的程序指令，以使计算设备执行根据本发明的方法。
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公开(公告)号：US20060002474A1
公开(公告)日：2006-01-05
申请号：US11168232
申请日：2005-06-27
申请人： Oscar Chi-Lim Au , Andy Chang
发明人： Oscar Chi-Lim Au , Andy Chang
摘要： A novel method, system, and apparatus for efficient multi-block motion estimation in a digital signal compression and coding scheme. This invention selects only a few representative block sizes for motion estimation when certain favourable conditions occur, rather than using all available block sizes. This invention produces significantly reduced computational costs with virtually no sacrifice in visual quality and in bit-rate.
摘要翻译： 一种用于数字信号压缩和编码方案中的高效多块运动估计的新颖方法，系统和装置。 本发明在某些有利条件发生时仅选择几个表示块大小用于运动估计，而不是使用所有可用的块大小。 本发明大大降低了计算成本，几乎没有牺牲视觉质量和比特率。
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公开(公告)号：US20100215106A1
公开(公告)日：2010-08-26
申请号：US12775312
申请日：2010-05-06
申请人： Oscar Chi-Lim Au , Andy Chang
发明人： Oscar Chi-Lim Au , Andy Chang
CPC分类号： H04N19/573
摘要： There is disclosed a method of digital signal compression, coding and representation, and more particularly a method of video compression, coding and representation system that uses multi-frame motion estimation and includes both device and method aspects. The invention also provides a computer program product, such as a recording medium, carrying program instructions readable by a computing device to cause the computing device to carry out a method according to the invention.
摘要翻译： 公开了一种数字信号压缩，编码和表示的方法，特别是使用多帧运动估计的视频压缩，编码和表示系统的方法，包括设备和方法两个方面。 本发明还提供了诸如记录介质的计算机程序产品，其携带由计算设备可读的程序指令，以使计算设备执行根据本发明的方法。
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公开(公告)号：US11639981B2
公开(公告)日：2023-05-02
申请号：US17492642
申请日：2021-10-03
申请人： Chenshu Wu , Beibei Wang , Xiaolu Zeng , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Chenshu Wu , Beibei Wang , Xiaolu Zeng , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for movement tracking are described. In one example, a described system comprises: at least one sensor configured to generate at least one sensing information (SI); a memory; a processor communicatively coupled to the memory and the at least one sensor; and a set of instructions stored in the memory. The set of instructions, when executed by the processor, cause the processor to: obtain at least one time series of SI (TSSI) from the at least one sensor, analyze the at least one TSSI, track a movement of an object in a venue based on the at least one TSSI, compute an incremental distance associated with the movement of the object in a first incremental time period based on the at least one TSSI, compute a direction associated with the movement of the object in a second incremental time period based on the at least one TSSI, and compute a next location of the object at a next time based on at least one of: a current location of the object at a current time, a current orientation of the object at the current time, the incremental distance, the direction, or a map of the venue.
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公开(公告)号：US20230021342A1
公开(公告)日：2023-01-26
申请号：US17960080
申请日：2022-10-04
申请人： Beibei Wang , Sakila Sandeepani Jayaweera Samaranayake Arachchige Dona , Xiaolu Zeng , Wei-Hsiang Wang , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Beibei Wang , Sakila Sandeepani Jayaweera Samaranayake Arachchige Dona , Xiaolu Zeng , Wei-Hsiang Wang , K. J. Ray Liu , Oscar Chi-Lim Au
IPC分类号： A61B5/00 , H04B17/309
摘要： Methods, apparatus and systems for enhanced wireless monitoring of vital signs are described. In one example, a described system comprises: a transmitter configured to transmit a wireless signal through a wireless channel of a venue; a receiver configured to receive the wireless signal through the wireless channel; and a processor. The received wireless signal differs from the transmitted wireless signal due to the wireless channel that is impacted by a periodic motion of a vital sign of an object in the venue. The processor is configured for: obtaining a time series of channel information (CI) of the wireless channel based on the received wireless signal, computing a two dimensional (2D) decomposition of the time series of CI (TSCI), enhancing the 2D decomposition, and monitoring the periodic motion of the vital sign based on the enhanced 2D decomposition.
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6.发明授权公开(公告)号：US11408978B2
公开(公告)日：2022-08-09
申请号：US16871006
申请日：2020-05-10
申请人： Fengyu Wang , Beibei Wang , Chenshu Wu , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Fengyu Wang , Beibei Wang , Chenshu Wu , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for wireless vital signs monitoring are described. In one embodiment, a described system comprises: a transmitter, a receiver, a processor. The transmitter transmits, using N1 transmit antennas, a wireless signal through a wireless multipath channel of a venue, while a first object in the venue is having a first repetitive motion. The receiver receives, using N2 receive antennas, the wireless signal through the wireless multipath channel, and extracts a plurality of time series of channel information (TSCI) of the wireless multipath channel from the wireless signal. N1 and N2 are positive integers. Each of the plurality of TSCI is associated with a transmit antenna of the transmitter and a receive antenna of the receiver. The processor computes a first information of the first repetitive motion based on the plurality of TSCI, and monitors the first repetitive motion of the first object based on the first information.
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7.发明申请公开(公告)号：US20220091231A1
公开(公告)日：2022-03-24
申请号：US17539058
申请日：2021-11-30
申请人： Sai Deepika Regani , Qinyi Xu , Beibei Wang , Min Wu , Oscar Chi-Lim Au , K. J. Ray Liu
发明人： Sai Deepika Regani , Qinyi Xu , Beibei Wang , Min Wu , Oscar Chi-Lim Au , K. J. Ray Liu
摘要： Methods, apparatus and systems for monitoring an object expression are described. In one example, a described apparatus in a venue comprises a receiver and a processor. The receiver is configured for: receiving a wireless signal from a transmitter through a wireless multipath channel that is impacted by an expression of an object in the venue, wherein the object has at least one movable part and is expressed in the expression with respect to a setup in the venue; and obtaining a time series of channel information (TSCI) of the wireless multipath channel based on the wireless signal received by the receiver. The processor is configured for computing information associated with the object based at least partially on the TSCI obtained when the object is expressed in the expression, and performing, based on the information associated with the object, a task associated with at least one of the object and the venue.
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公开(公告)号：US20210311166A1
公开(公告)日：2021-10-07
申请号：US17352185
申请日：2021-06-18
申请人： Chenshu Wu , Beibei Wang , Peng Zan , Sai Deepika Regani , Xiaolu Zeng , Hung-Quoc Duc Lai , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Chenshu Wu , Beibei Wang , Peng Zan , Sai Deepika Regani , Xiaolu Zeng , Hung-Quoc Duc Lai , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for wirelessly monitoring a micro motion of an object 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 and 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, wherein each channel information (CI) of the TSCI comprises N1 CI components; selecting N2 CI components from the N1 CI components based on a first analysis of the N1 CI components; computing a micro-motion (MM) statistics based on the N2 selected CI components and the first analysis; monitoring the motion of the object based on a second analysis of the MM statistics; performing a task based on the first analysis and the second analysis; and generating a response based on the task, the first analysis and the second analysis.
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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
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.
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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
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.
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