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    • 5. 发明申请
    • SYSTEM AND METHOD FOR VIDEO PROCESSING
    • 用于视频处理的系统和方法
    • WO2017092007A1
    • 2017-06-08
    • PCT/CN2015/096325
    • 2015-12-03
    • SZ DJI TECHNOLOGY CO., LTD.
    • MAO, ChenglinCAO, ZishengBAO, Linchao
    • H04N21/43H04N21/23
    • H04N21/242H04N21/21805H04N21/23418H04N21/816
    • A system for video synchronization between multiple video streams and methods for making and using same. The video synchronization system can synchronize video frames of a search frame sequence with respect to a reference frame sequence, ordering frames of the search frame sequence so that image data of the search frame sequence corresponds to image data of the reference frame sequence. Video synchronization can be performed for video streams that originate from a single imaging device or multiple imaging devices. Comparison of the search frame sequence to the reference sequence can be performed using point sequences in the image data. The points of the point sequences can be individual pixels or features having one or more pixels. Video synchronization can be performed by maximizing a correlation, between corresponding image data. The systems and methods are advantageously suitable for synchronizing videos taken from mobile platforms such as unmanned aerial vehicles.
    • 一种用于多个视频流之间的视频同步的系统及其制作和使用方法。 视频同步系统可以使搜索帧序列的视频帧相对于参考帧序列同步,对搜索帧序列的帧进行排序,使得搜索帧序列的图像数据对应于参考帧序列的图像数据。 可以对来自单个成像设备或多个成像设备的视频流执行视频同步。 可以使用图像数据中的点序列来执行搜索帧序列与参考序列的比较。 点序列的点可以是单个像素或具有一个或多个像素的特征。 视频同步可以通过最大化相应图像数据之间的相关性来执行。 该系统和方法有利地适用于同步从诸如无人驾驶飞行器的移动平台拍摄的视频。
    • 9. 发明申请
    • MANAGEMENT OF BROADCAST ENCRYPTED DIGITAL MULTIMEDIA DATA RECEIVERS
    • 广播加密数字多媒体数据接收器的管理
    • WO2016189105A1
    • 2016-12-01
    • PCT/EP2016/061942
    • 2016-05-26
    • NAGRAVISION S.A.
    • SARDA, PierreJUNOD, Pascal
    • H04N21/4623H04N21/266H04N21/242H04N21/258
    • H04N21/4623H04N21/242H04N21/2585H04N21/26606
    • The disclosed method and server of a head-end managing at least one receiver take advantages of a unidirectional transmission link and a bidirectional transmission link. The unidirectional transmission is used by the head-end for transmitting to one or more receivers, streams comprising encrypted multimedia content data and conditional access data associated to the encrypted multimedia content data. In order to synchronize the receivers with the head-end at given time-periods, the head-end is configured to manage receivers that have been revoked or unreachable during a certain time. The method thus uses a hybrid broadcast encryption scheme consisting of using a stateless cryptographic attribute-based broadcast encryption scheme configured to exploit the available bidirectional transmission link between the head-end and the receivers in a very efficient way. Revoked receivers recover a non- revoked state involving synchronization with the head-end.
    • 所公开的管理至少一个接收机的前端的方法和服务器具有单向传输链路和双向传输链路的优点。 单向传输由头端用于向一个或多个接收机发送,包括加密的多媒体内容数据和与加密的多媒体内容数据相关联的条件访问数据的流。 为了在给定的时间周期将接收机与头端同步,头端被配置为管理在特定时间内被撤销或不可达的接收机。 因此,该方法使用混合广播加密方案,其包括使用基于无状态密码属性的广播加密方案,其被配置为以非常有效的方式利用头端与接收者之间的可用双向传输链路。 撤销的接收器恢复涉及与头端同步的非撤销状态。