论文标题
通过非本地的精制运动补偿在视频编码中的时空预测
Spatio-temporal prediction in video coding by non-local means refined motion compensation
论文作者
论文摘要
预测步骤是混合视频编解码器的非常重要的一部分。在这一贡献中，引入了一种新颖的时空预测算法。为此，预测分两个步骤进行。首先，通过运动补偿进行初步时间预测。之后，进行空间改进，以通过已解码的相邻块的空间冗余进行整合。因此，通过将非本地均值用于运动补偿块和已经解码的块来实现空间改进。将空间细化包括在H.264/AVC中，与未经修饰的运动补偿预测相比，比率分别降低了14％或最高为0.7 dB PSNR。
The prediction step is a very important part of hybrid video codecs. In this contribution, a novel spatio-temporal prediction algorithm is introduced. For this, the prediction is carried out in two steps. Firstly, a preliminary temporal prediction is conducted by motion compensation. Afterwards, spatial refinement is carried out for incorporating spatial redundancies from already decoded neighboring blocks. Thereby, the spatial refinement is achieved by applying Non-Local Means de-noising to the union of the motion compensated block and the already decoded blocks. Including the spatial refinement into H.264/AVC, a rate reduction of up to 14 % or respectively a gain of up to 0.7 dB PSNR compared to unrefined motion compensated prediction can be achieved.
