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2. 发明申请

WO2015138008A1 CONTINUOUS BLOCK TRACKING FOR TEMPORAL PREDICTION IN VIDEO ENCODING 审中-公开
标题翻译：连续块跟踪在视频编码中进行时间预测
公开(公告)号：WO2015138008A1
公开(公告)日：2015-09-17
申请号：PCT/US2014/063913
申请日：2014-11-04
申请人： EUCLID DISCOVERIES, LLC
发明人： KOTTKE, Dane, P. , GUO, John, J. , LEE, Jeyun , PARK, Sangseok , LEE, Nigel , WEED, Christopher , KWAN, Justin
IPC分类号： H04N19/56 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/527 , H04N19/53 , H04N19/58
CPC分类号： H04N19/56 , H04N19/105 , H04N19/117 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/517 , H04N19/527 , H04N19/53 , H04N19/58
摘要： Continuous block tracking tracks the locations of input video blocks (macroblocks) over multiple reference frames to produce better inter-predictions than can be found through conventional block-based motion estimation and compensation. The continuous block tracker is comprised of both frame-to-frame tracking, estimating motion from a frame to a previous frame, and continuous tracking, related frame -to-frame motion vectors to specific block tracks. Frame-to-frame tracking may be carried out, for example, using either block based motion estimation or hierarchical motion estimation. The continuous block tracker can be combined with enhanced predictive zonal search to create a unified motion estimation algorithm. Continuous tracking results can be accumulated to form trajectories that can be used to derive trajectory-based continuous block tracker predictions. Metrics that measure the quality of continuous tracks and their associated motion vectors can be used to assess the relative priority of continuous block tracker predictions against non-tracker-based predictions and to modify encoding choices according to the likely scenarios indicated by the metrics. Continuous tracks can be analyzed for goodness-of-fit to translational motion models, with outliers removed from encoding consideration. Translational motion model analysis can be extended to entire frames as part of an adaptive picture type selection algorithm. Outputs from the continuous block tracker can be used in a look-ahead processing module, in the form of look-ahead tracking, to provide rate control information and scene change detection for the current frame being encoded.
摘要翻译：连续块跟踪跟踪多个参考帧上的输入视频块（宏块）的位置，以产生比通过常规的基于块的运动估计和补偿可以发现的更好的相互预测。连续块跟踪器由帧到帧跟踪，估计从帧到先前帧的运动以及连续跟踪，相关的帧到帧运动向量到特定块轨道。可以例如使用基于块的运动估计或分层运动估计来执行帧到帧跟踪。连续块跟踪器可以与增强的预测区域搜索相结合，以创建统一的运动估计算法。可以累积连续跟踪结果以形成可用于导出基于轨迹的连续块跟踪器预测的轨迹。衡量连续轨道质量及其相关运动矢量的度量可用于评估连续块跟踪器预测与非基于跟踪者的预测的相对优先级，并根据指标所指示的可能场景修改编码选择。可以对平移运动模型的适合度进行连续轨迹分析，从编码考虑中删除异常值。作为自适应图像类型选择算法的一部分，平移运动模型分析可以扩展到整个帧。来自连续块跟踪器的输出可以以预先跟踪的形式用在预先处理模块中，以便为正在编码的当前帧提供速率控制信息和场景变化检测。

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