视频编码运动估计的亚像素精度

Proceedings of the 1992 South African Symposium on Communications and Signal Processing Pub Date : 1992-09-11 DOI:10.1109/COMSIG.1992.274303

F. Bellifemine, M. Celidonio, A. Chimienti, G. Marcone, R. Picco

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引用次数: 2

摘要

目的是分析用于混合DCT编码方案的估计精度。为了考虑亚像素精度的位移，对传统的块匹配算法进行了推广:测试了1、1/2和1/4像素精度以及不同的插值函数。用预测误差能量来评价估计过程的性能。考虑到运动矢量传输开销的增加，本文还从速率畸变理论的角度对该问题进行了探讨，并对总体性能进行了测试。尝试克服亚像素精度的计算复杂性。通过对混合编码器的模拟，得到了恒定质量编码的结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Subpixel accuracy in motion estimation for video coding

The aim is analysis of estimation accuracy for use in hybrid DCT coding schemes. The traditional block-matching algorithm has been generalized in order to take into account displacements of subpixel accuracy: 1, 1/2 and 1/4 pixel accuracies and different interpolation functions have been tested. The prediction error energy has been used to evaluate the performance of the estimation process. The problem has also been approached from the rate distortion theory point of view and the total performance tested considering also the increase in overheads for transmission of the motion vectors. An attempt to overcome the computational complexity of subpixel accuracies has been made. Results have been obtained by simulating a hybrid coder for constant quality coding.<>

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Proceedings of the 1992 South African Symposium on Communications and Signal Processing

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