现代电子技术2018，Vol.41Issue(6)：28-33,6.DOI:10.16652/j.issn.1004-373x.2018.06.007
分布式视频编码中基于滑窗的自适应相关估计方法
Sliding-window based adaptive correlation estimation method for distributed video coding
摘要
Abstract
The correlation modeling and parameter estimation for signal sources and side information are key processes in distributed video coding(DVC). In DVC,correlation noise distribution is unstable and changes dynamically with the scene se-quence,so it is important to accurately predict and track correlation parameters. To give full play to the advantage of distributed source coding(DSC),an adaptive correlation estimation method based on sliding-window is proposed in this paper. In the meth-od,the sliding-window idea is embedded in the Slepian-Wolf decoder based on LDPCA code. The method can adaptively select whether re-estimation should be executed in combination with correlation parameters of side information and bit stream online es-timation image source,so as to optimize joint bit-plane belief propagation(JBBP)iterative decoding. The experimental results show that,taking the advanced DVC scheme DISCOVER as the criterion,the scheme using the proposed method can improve rate-distortion performance of the system while maintaining low coding complexity.关键词
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Key words
DVC/correlation estimation/belief propagation algorithm/joint bit-plane decoding/LDPCA code/DSC分类
信息技术与安全科学引用本文复制引用
朱蓉蓉,方勇..分布式视频编码中基于滑窗的自适应相关估计方法[J].现代电子技术,2018,41(6):28-33,6.基金项目
国家自然科学基金项目资助:算术码码谱及其应用研究(61271280) Project Supported by National Natural Science Foundation of China:code spectrum of arithmetic code and its application research(61271280) （61271280）
