自适应运动矢量精度在插值算法中的应用

根据对H.26L视频图像编码算法的研究，提出了一些新的有效的编码方法。在运动估值和运动补偿方面，采用立方卷积插值算法替代双线性插值以获得更高的估值精度，并提出混合插值与自适应运动矢量精度（AMVA）相结合的算法，着重就平均峰值信噪比、压缩效率和主观图像质量做了分析和比较。从实验结果看，算法获得了满意的效果，实现的H.26L软件编解码器在压缩比方面较H.263软件编解码器有明显提高，具有较大的实用价值。相信所做的工作对甚低码率视频图像编码的实际应用和推广将起到一定作用。

The Application of Adaptive Motion Vector Accuracy in Cubic Convolution Interpolation

In this paper, some novel video coding algorithms are proposed based on the research of H. 26L. In motion compensated prediction, cubic convolution interpolation which improves prediction precision, is adopted and the algorithm of mixed interpolation in combination with Adaptive Motion Vector Accuracy is proposed. Judging from the simulation, the algorithms achieve satisfactory results. H.26L video encoder, better than H.263, can realize real-time coding and has a good practicing value. There-fore what has been studied should be a promotion to make very low bit rate video coding work in practice and in wide use.