Multi-Frame Motion Compensation Using Extrapolated Frame by Optical Flow for Lossless Video Coding
Multi-Frame Motion Compensation Using Extrapolated Frame by Optical Flow for Lossless Video Coding
复制标题
使用光流外插帧进行无损视频编码的多帧运动补偿
DOI：
10.1109/isspit.2016.7886053
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Susumu Itoh
中科院分区：
文献类型：
--
作者：
Yusuke Kameda;Hiroyuki Kishi;Tomokazu Ishikawa;Ichiro Matsuda;Susumu Itoh
我们提出了一种有效的运动补偿方法的基础上，通过使用pel-明智的运动（光流）估计的时间外推帧。在传统的运动补偿方法中，运动矢量通常是在逐块的基础上检测的，并作为辅助信息发送到解码器。然而，这样的块式运动并不总是适合于诸如局部缩放、旋转和变形的运动。另一方面，可以在编码器和解码器两侧从先前在没有边信息的情况下编码的两个连续帧来估计pel方式的运动。pel-方向运动的使用使得能够在短时间段内在线性均匀运动的假设下生成外推帧。该帧是要编码的帧的近似。所提出的双向预测方法使用外推帧作为参考帧之一。实验结果表明，该方法的预测性能优于传统方法。
We propose an efficient motion compensation method based on a temporally extrapolated frame by using a pel-wise motion (optical flow) estimation. In traditional motion compensation methods, motion vectors are generally detected on a block-by-block basis and sent to the decoder as side information. However, such block-wise motions are not always suitable for motions such as local scaling, rotation, and deformation. On the other hand, pel-wise motion can be estimated on both the side of the encoder and decoder from two successive frames that were previously encoded without side information. The use of pel-wise motion enables the extrapolated frame to be generated under the assumption of linear uniform motions within a short time period. This frame is an approximation of the frame to be encoded. The proposed bi-prediction method uses the extrapolated frame as one of the reference frames. The experimental results indicate that the prediction performance of the proposed method is higher than that of the traditional method.