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    • 9. 发明授权
    • System and method for real-time new event detection on video streams
    • 用于视频流实时新事件检测的系统和方法
    • US09215479B2
    • 2015-12-15
    • US13759638
    • 2013-02-05
    • International Business Machines Corporation
    • Gang LuoRong YanPhilip Shi-Lung Yu
    • G06K9/66G06K9/62H04N21/234G06K9/00H04N21/44H04N21/454H04N21/4545
    • H04N21/23418G06K9/00765H04N21/44008H04N21/4542H04N21/45452
    • Techniques are disclosed for detecting new events in a video stream that yield improved detection efficiency in real time. For example, a method determines whether a given event is a new event in a video stream. The video stream includes a plurality of events. A first step extracts a first set of features (e.g., text features) from the given event. The first set of features is computationally less expensive to process as compared to a second set of features (e.g., image features) associated with the given event. A second step computes one or more first dissimilarity values between the given event and one or more previous events in the video stream using only the first set of features when one or more first dissimilarity criteria exist. A third step determines whether the given event is a new event based on the one or more computed first dissimilarity values.
    • 公开了用于检测视频流中的新事件的技术,其实时地提高了检测效率。 例如,一种方法确定给定事件是否是视频流中的新事件。 视频流包括多个事件。 第一步骤从给定事件中提取第一组特征(例如,文本特征)。 与给定事件相关联的第二组特征(例如,图像特征)相比,第一组特征在计算上较便宜。 第二步骤当存在一个或多个第一不相似性标准时,仅使用第一组特征,在给定事件与视频流中的一个或多个先前事件之间计算一个或多个第一不相似性值。 第三步骤基于一个或多个计算的第一不相似性值确定给定事件是否是新的事件。
    • 10. 发明授权
    • Compressing and decompressing signal data
    • 压缩和解压缩信号数据
    • US08902090B2
    • 2014-12-02
    • US13899839
    • 2013-05-22
    • International Business Machines Corporation
    • Xinhao ChengMingqiang LiYonghua LinQing WangChao XueRong YanHai ZhanChao Zhu
    • H03M7/30H04B1/66H04N19/61H04J3/16G06T9/00
    • H03M7/30G06T9/005H04B1/665H04J3/1611H04N7/52H04N19/61
    • The present invention relates to data compression and decompression, and particularly relates to a method and an apparatus for compressing and decompressing signal data. In an embodiment of the present invention, there is disclosed a method for compressing signal data, comprising: obtaining signal data; determining block lengths of a plurality of data blocks into which the signal data are divided, and determining exponents of the data blocks; forming a mantissa sequence of the data block by using the exponent of the data block to compress signal data contained in the data block; and forming a compressed data block by using the block length, the exponent and the mantissa sequence of the data block. By constructing a variable-length data block adapted to dynamic characteristics of signal data, the method for compressing signal data of the present invention increases the compression ratio of signal data.
    • 本发明涉及数据压缩和解压缩,特别涉及用于压缩和解压缩信号数据的方法和装置。 在本发明的实施例中,公开了一种用于压缩信号数据的方法,包括:获得信号数据; 确定信号数据被划分成多个数据块的块长度,并确定数据块的指数; 通过使用数据块的指数来形成数据块的尾数序列来压缩包含在数据块中的信号数据; 以及通过使用数据块的块长度,指数和尾数序列来形成压缩数据块。 通过构造适于信号数据的动态特性的可变长度数据块,本发明的压缩信号数据的方法增加了信号数据的压缩比。