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    • 2. 发明授权
    • Methods and systems for detection and location of multiple emitters
    • 用于检测和定位多个发射器的方法和系统
    • US07626546B2
    • 2009-12-01
    • US11904630
    • 2007-09-27
    • Hyo K. ChungPhuong H. LeJohn M. ParkerDavid L. ReidMark A. Robertson
    • Hyo K. ChungPhuong H. LeJohn M. ParkerDavid L. ReidMark A. Robertson
    • G01S3/02
    • G01S5/12G01S5/0009
    • Systems and methods for detection and geolocation of multiple emitters that are emitting RF signal energy on a common frequency, and that may be implemented to separate, geolocate, and/or determine the number of emitters (e.g., radio users) emitting on a common RF frequency. Real-time signal qualification processing may be employed to continuously monitor and collect incoming receiver tuner data for signal activity and ignore irrelevant noise data. Each set of data blocks from an emitter transmission signal may be defined as an emission cluster, and a set of time difference of arrival (TDOA)/frequency difference of arrival (FDOA) pairs may be computed for each emission cluster with each TDOA/FDOA pair yielding a geolocation result. A statistical qualification method may be used to produce a final geolocation answer from each set of emission cluster geolocation results, and a geolocation error ellipse computed for the final geolocation answer of each emission cluster. The final geolocation answer of each emission cluster may be run through a correlation and fusion algorithm.
    • 用于在公共频率上发射RF信号能量的多个发射器的检测和地理定位的系统和方法,并且可以被实现以分离,定位和/或确定在公共RF上发射的发射器(例如,无线电用户)的数量 频率。 可以采用实时信号鉴定处理来连续地监视和收集输入的接收机调谐器数据以用于信号活动并忽略不相关的噪声数据。 来自发射器传输信号的每组数据块可以被定义为发射簇,并且可以针对每个发射簇计算每个TDOA / FDOA的一组到达时间差(TDOA)/到达频差对(FDOA)对 对产生地理定位结果。 可以使用统计鉴定方法来从每组发射簇地理定位结果产生最终地理位置答案,并且为每个发射群集的最终地理位置答案计算出的地理定位误差椭圆。 每个发射群集的最终地理位置答案可以通过相关和融合算法运行。
    • 3. 发明申请
    • DATALINK THROUGHPUT REDUCTION VIA ENERGY DETECTION
    • DATALINK通过能源检测实现减少
    • US20080039039A1
    • 2008-02-14
    • US11463804
    • 2006-08-10
    • Hyo K. ChungPhuong H. LeJohn M. ParkerDavid L. ReidMark A. Robertson
    • Hyo K. ChungPhuong H. LeJohn M. ParkerDavid L. ReidMark A. Robertson
    • H04B1/18
    • G01S5/0226
    • A geolocation system (10) includes an emitter (12), a plurality of collection nodes (14,16,18), and a control station (20). Each collection node includes a receiver (24) that is operable to receive signals transmitted from the emitter (12), generate a reduced data stream that includes only signal data, and communicate the reduced data stream to the control station (20) along with navigation data. The receiver (24) identifies signal data by detecting an energy level of the raw collection data. More specifically, the receiver (24) determines a bandwidth and a signal-to-noise ratio of each portion of the collection data, and identifies each portion as including signal data if both the bandwidth and the signal-to-noise ratio exceed predetermined threshold amounts. The receiver (24) includes a digital signal processing component (36) for performing calculations used by the receiver (24) to determine the bandwidth and the signal-to-noise ratio.
    • 地理定位系统(10)包括发射器(12),多个收集节点(14,16,18)和控制站(20)。 每个收集节点包括可操作以接收从发射器(12)发送的信号的接收器(24),产生仅包括信号数据的减小的数据流,并且将导致数据流传送到控制站(20)的导航 数据。 接收器(24)通过检测原始采集数据的能级来识别信号数据。 更具体地,接收器(24)确定收集数据的每个部分的带宽和信噪比,并且如果带宽和信噪比都超过预定阈值,则将每个部分识别为包括信号数据 金额 接收机(24)包括数字信号处理部件(36),用于执行由接收器(24)使用的计算以确定带宽和信噪比。
    • 5. 发明申请
    • System for and method of transcoding video sequences from a first format to a second format
    • 将视频序列从第一格式转码为第二格式的系统和方法
    • US20090097560A1
    • 2009-04-16
    • US11974091
    • 2007-10-10
    • Mark A. Robertson
    • Mark A. Robertson
    • H04B1/66
    • H04N19/577H04N19/107H04N19/109H04N19/112H04N19/122H04N19/137H04N19/14H04N19/172H04N19/176H04N19/186H04N19/40H04N19/51
    • The present invention discloses systems for and methods of transcoding first video data in a first format, such as AVC, into second video data in a second format, such as MPEG-2. A method in accordance with the present invention disables deblocking filters, bypasses macroblock encoding for certain picture types, such as B-pictures, and re-uses motion vectors. In one embodiment, motion vectors for the second video data are set substantially equal to motion vectors for the first video data, when the two differ by less than a threshold value. In other embodiments, only macroblocks that contain all zero-valued blocks bypass the transcoding process, thereby simplifying the transcoding process further. Other embodiments further simplify the transcoding process by requiring that B-pictures are not used as reference pictures, reference pictures in the second video data are restricted to be the same as reference pictures in the first video data, and bi-predictions are not allowed.
    • 本发明公开了以第一格式(例如AVC)将第一视频数据转码为MPEG-2等第二格式的第二视频数据的系统和方法。 根据本发明的方法禁止去块滤波器,绕过诸如B图像的某些图像类型的宏块编码,并重新使用运动矢量。 在一个实施例中,当两者相差小于阈值时,第二视频数据的运动矢量基本上等于第一视频数据的运动矢量。 在其他实施例中,仅包含所有零值块的宏块绕过转码过程,从而进一步简化转码过程。 其他实施例通过要求B图像不用作参考图像进一步简化代码转换处理,第二视频数据中的参考图片被限制为与第一视频数据中的参考图片相同,并且不允许双重预测。
    • 9. 发明授权
    • System for and method of transcoding video sequences from a first format to a second format
    • 将视频序列从第一格式转码为第二格式的系统和方法
    • US08098732B2
    • 2012-01-17
    • US11974091
    • 2007-10-10
    • Mark A. Robertson
    • Mark A. Robertson
    • H04N7/12
    • H04N19/577H04N19/107H04N19/109H04N19/112H04N19/122H04N19/137H04N19/14H04N19/172H04N19/176H04N19/186H04N19/40H04N19/51
    • The present invention discloses systems for and methods of transcoding first video data in a first format, such as AVC, into second video data in a second format, such as MPEG-2. A method in accordance with the present invention disables deblocking filters, bypasses macroblock encoding for certain picture types, such as B-pictures, and re-uses motion vectors. In one embodiment, motion vectors for the second video data are set substantially equal to motion vectors for the first video data, when the two differ by less than a threshold value. In other embodiments, only macroblocks that contain all zero-valued blocks bypass the transcoding process, thereby simplifying the transcoding process further. Other embodiments further simplify the transcoding process by requiring that B-pictures are not used as reference pictures, reference pictures in the second video data are restricted to be the same as reference pictures in the first video data, and bi-predictions are not allowed.
    • 本发明公开了以第一格式(例如AVC)将第一视频数据转码为MPEG-2等第二格式的第二视频数据的系统和方法。 根据本发明的方法禁止去块滤波器,绕过诸如B图像的某些图像类型的宏块编码,并重新使用运动矢量。 在一个实施例中,当两者相差小于阈值时,第二视频数据的运动矢量基本上等于第一视频数据的运动矢量。 在其他实施例中,仅包含所有零值块的宏块绕过转码过程,从而进一步简化转码过程。 其他实施例通过要求B图像不用作参考图像进一步简化代码转换处理,第二视频数据中的参考图片被限制为与第一视频数据中的参考图片相同,并且不允许双重预测。