密集向量场解码器侧分层运动估计

S. Klomp, Marco Munderloh, J. Ostermann
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引用次数: 10

摘要

当前的视频编码标准在编码器上执行运动估计,以便在编码之前预测帧。由于解码器不具有源帧,估计的运动矢量必须作为附加的侧信息传输。最近的研究表明,可以通过在解码器执行额外的运动估计来降低数据速率。因为只使用已经解码的数据,所以不需要传输额外的数据。本文提出了一种用于解码器侧运动估计系统的改进的分层运动估计算法。一种特殊的运动矢量锁存用于非常小的块大小,并更好地适应对象边界。使用该技术,估计了密集的运动矢量场,与相同质量的H.264 / AVC相比,平均降低了6.9%的速率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Decoder-side hierarchical motion estimation for dense vector fields
Current video coding standards perform motion estimation at the encoder to predict frames prior to coding them. Since the decoder does not possess the source frames, the estimated motion vectors have to be transmitted as additional side information. Recent research revealed that the data rate can be reduced by performing an additional motion estimation at the decoder. As only already decoded data is used, no additional data has to be transmitted. This paper addresses an improved hierarchical motion estimation algorithm to be used in a decoder-side motion estimation system. A special motion vector latching is used to be more robust for very small block sizes and to better adapt to object borders. With this technique, a dense motion vector field is estimated which reduces the rate by 6.9% in average compared to H.264 / AVC at the same quality.
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