A New Update Step for Reduction of PSNR Fluctuations in Motion-Compensated Lifted Wavelet Video Coding

2005 IEEE 7th Workshop on Multimedia Signal Processing Pub Date : 2005-10-01 DOI:10.1109/MMSP.2005.248667

Aditya Mavlankar, Sangeun Han, Chuo-Ling Chang, B. Girod

引用次数: 8

Abstract

In wavelet video coding, due to motion-compensation entwined in the temporal wavelet transform, the distortion in the temporal subbands propagates in an uneven manner into the reconstructed frames of a group of pictures. This leads to fluctuation of reconstruction quality in time, which can be visually displeasing. We propose a new update step which is derived by taking into account a Lagrangian term for even distribution of distortion among reconstructed frames in addition to minimizing total distortion. Additionally some heuristics for the implementation of this new update step are proposed. Experimental results show reduction of quality fluctuation compared to the conventional update step

查看原文本刊更多论文

运动补偿提升小波视频编码中减小PSNR波动的新方法

在小波视频编码中，由于时间小波变换中缠绕着运动补偿，时间子带中的畸变以不均匀的方式传播到一组图像的重构帧中。这导致重建质量随时间的波动，这在视觉上是不愉快的。我们提出了一种新的更新步骤，该步骤考虑了重构帧间畸变均匀分布的拉格朗日项，并最小化了总畸变。此外，还提出了实现这一新的更新步骤的一些启发式方法。实验结果表明，与传统的更新步骤相比，该方法减小了质量波动

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2005 IEEE 7th Workshop on Multimedia Signal Processing

自引率

0.00%

发文量