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    • 21. 发明授权
    • Using polling results as discrete metrics for content quality prediction model
    • 使用轮询结果作为内容质量预测模型的离散度量
    • US08738698B2
    • 2014-05-27
    • US13082396
    • 2011-04-07
    • Rong YanJohn Hegeman
    • Rong YanJohn Hegeman
    • G06F15/16
    • G06Q30/0245G06N5/048G06Q30/02G06Q30/0202
    • A social networking system presents content items to users, who then provide feedback regarding pairs of content items. The feedback includes a selection of a content item of the pair of content items that was preferred by the user over the other content item. The social networking system uses this information to train a predictive model that scores content items based on quality. The content items may be advertisements. The social networking system uses the pair-wise comparisons of the advertisements to determine feedback coefficients in an advertising quality score prediction model using regression analysis of the pair-wise comparisons for each predictive factor in the model. In this way, the pair-wise comparisons are used to train the prediction model to understand which advertisements are more enjoyable than others. A feedback coefficient for each predictive factor may be computed based on the preferences received from the group of users.
    • 社交网络系统向用户呈现内容,然后他们提供关于内容对的反馈。 反馈包括用户对其他内容项目优选的内容项目对的内容项的选择。 社交网络系统使用该信息来训练基于质量对内容项进行评分的预测模型。 内容项可以是广告。 社交网络系统使用广告的成对比较来确定广告质量得分预测模型中的反馈系数,其使用对于模型中的每个预测因子的成对比较的回归分析。 以这种方式,使用成对比较来训练预测模型,以了解哪些广告比其他广告更愉快。 可以基于从用户组接收的偏好来计算每个预测因子的反馈系数。
    • 29. 发明申请
    • System and Method for Real-time New Event Detection on Video Streams
    • 视频流实时新事件检测系统与方法
    • US20100329563A1
    • 2010-12-30
    • US11933775
    • 2007-11-01
    • Gang LuoRong YanPhilip Shi-Lung Yu
    • Gang LuoRong YanPhilip Shi-Lung Yu
    • G06K9/46G06K9/68
    • 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。
    • 30. 发明授权
    • Systems and methods with error resilience in enhancement layer bitstream of scalable video coding
    • 在可扩展视频编码的增强层比特流中具有错误弹性的系统和方法
    • US07664185B2
    • 2010-02-16
    • US10978277
    • 2004-10-29
    • Ya-Qin ZhangShipeng LiFeng WuRong Yan
    • Ya-Qin ZhangShipeng LiFeng WuRong Yan
    • H04N7/18
    • H04N19/29H04N19/34H04N19/68H04N19/89
    • A scalable layered video coding scheme that encodes video data frames into multiple layers, including a base layer of comparatively low quality video and multiple enhancement layers of increasingly higher quality video, adds error resilience to the enhancement layer. Unique resynchronization marks are inserted into the enhancement layer bitstream in headers associated with each video packet, headers associated with each bit plane, and headers associated with each video-of-plane (VOP) segment. Following transmission of the enhancement layer bitstream, the decoder tries to detect errors in the packets. Upon detection, the decoder seeks forward in the bitstream for the next known resynchronization mark. Once this mark is found, the decoder is able to begin decoding the next video packet. With the addition of many resynchronization marks within each frame, the decoder can recover very quickly and with minimal data loss in the event of a packet loss or channel error in the received enhancement layer bitstream. The video coding scheme also facilitates redundant encoding of header information from the higher-level VOP header down into lower level bit plane headers and video packet headers. Header extension codes are added to the bit plane and video packet headers to identify whether the redundant data is included.
    • 将视频数据帧编码成多层的可分级的分层视频编码方案,包括具有越来越高质量视频的较低质量视频和多个增强层的基本层,向增强层增加了错误恢复能力。 将独特的再同步标记插入到与每个视频分组相关联的报头中的增强层比特流中,与每个位平面相关联的报头以及与每个视频平面(VOP)段相关联的报头。 在传输增强层比特流之后,解码器尝试检测分组中的错误。 在检测到时,解码器在比特流中向前寻找下一个已知的再同步标记。 一旦找到该标记,解码器就可以开始对下一个视频数据包进行解码。 通过在每个帧内添加许多重新同步标记,解码器可以在接收到的增强层比特流中的分组丢失或信道错误的情况下非常快速地恢复并且具有最小的数据丢失。 视频编码方案还有助于将标题信息从较高级别的VOP头部冗余编码到较低级位平面头部和视频分组头部。 标题扩展码被添加到位平面和视频分组报头,以标识是否包括冗余数据。