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Video Coding Based on Global Motion Compensated Motion Vectors

机译：基于全局运动补偿运动向量的视频编码

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摘要

A method of determining a bitstream is described, including: determining a motion vector of a current block of a video frame of a sequence of video frames comprising video data captured by a video capturing device, the motion vector defining an offset of the current block relative to a prediction block of an already encoded first reference video frame, part of the offset being associated with global motion in the video data if the video capturing device is moving relative to a scene; determining a motion vector predictor selected by the processor from motion vectors of already encoded blocks of the current video frame; and, a motion compensation vector for the motion vector of the current block, for providing an estimate of the part of the motion vector that is associated with global motion; determining a global motion compensated motion vector based on a difference between the motion vector and motion compensation vector, and, a motion vector difference based on the motion vector predictor and the compensated motion vector; and, the processor using an entropy coding algorithm to code the motion vector difference; and, conversion information for converting the compensated motion vector into the motion vector, into a bitstream.
机译：描述了确定比特流的方法，包括：确定包括由视频捕获装置捕获的视频数据的视频帧的视频帧的当前块的运动矢量，该运动矢量定义当前块相对的偏移量对于已经编码的第一参考视频帧的预测块，如果视频捕获设备相对于场景移动，则在视频数据中与全局运动相关联的部分偏移;从当前视频帧的已经编码块的运动向量确定由处理器选择的运动矢量预测值;并且，用于当前块的运动矢量的运动补偿矢量，用于提供与全局运动相关联的运动矢量的一部分的估计;基于运动矢量和运动补偿矢量的差异确定全局运动补偿运动矢量，基于运动矢量预测和补偿运动矢量的运动矢量差;并且，处理器使用熵编码算法来编码运动矢量差;并且，将补偿运动矢量转换为运动向量的转换信息进入比特流。

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