朱蓉蓉,方勇

• 1:西北农林科技大学信息工程学院

摘要(Abstract)：

信源与边信息之间的相关建模和参数估计一直是分布式视频编码的关键环节。在分布式视频编码中,相关噪声分布是非平稳的,会随着场景序列而动态变化,如何准确地预测和追踪相关参数十分重要。为了充分发挥分布式信源编码的优势,提出一种基于滑窗的自适应相关估计方法。该方法将滑窗的思想嵌入到基于LDPCA码的Slepian-Wolf解码器中,结合边信息和码流在线估计图像信源之间的相关参数,且能够自适应地选择是否进行重估,进而优化联合比特面置信传播迭代译码。实验结果表明,以先进的分布式视频编码方案DISCOVER作为基准,使用所提方法的方案在保持较低编码复杂度的情况下提高系统的率失真性能。

关键词(KeyWords)： 分布式视频编码;相关估计;置信传播算法;联合比特面解码;LDPCA码;分布式信源编码

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目资助:算术码码谱及其应用研究(61271280)~~

作者(Author): 朱蓉蓉,方勇

DOI: 10.16652/j.issn.1004-373x.2018.06.007

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