一种改进预测结构的多视点视频编码  

Improved prediction structure for multi-view video coding

作　　者：张卫卫[1] 蔡灿辉[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《计算机工程与应用》2012年第5期168-170,共3页Computer Engineering and Applications

基　　金：国家自然科学基金(No.60772164)

摘　　要：多视点视频编码是视频编码的研究热点之一。针对联合多视点视频编码(Joint Multi-view Video Coding,JMVC)采用的分层B帧预测结构编码复杂度高,随机访问性能较差等缺点,提出了一种改进的预测结构。所提出的预测结构对B视点中以前一帧作为其时间参考的帧仅采用时间预测,对所有P视点的非关键帧均不进行视点间预测,有效地降低了计算复杂度,提高了随机访问性能。通过选取合适的I视点位置,以减少结构简化带来的编码效率损失。实验结果表明,与分层B帧预测结构相比,所提出的预测结构在保证编码效率损失不大的情况下,显著降低了平均编码时间。改进的预测结构也具有更好的随机访问性能。Multi-view Video Coding（MVC）is a research hotspot in the video coding.In order to reduce the computational complexity and improve the temporal random access as well as spatial random access performance of hierarchical B pictures coding structure used as the basic structure in Joint Multi-view Video Coding（JMVC）,an improved prediction structure is proposed.The frame in B-view which uses the immediate previous frame as its reference adopts only temporal prediction,and inter-view prediction is skipped in non-anchor frames in P-view skip inter-view prediction,so that computational complexity is reduced and random access ability is im-proved.The position of I-view is also studied to minimize the loss of coding efficiency introduced.Experimental results have shown that compared to the hierarchical B pictures coding structure in JMVC,the proposed scheme achieves a remarkable reduction of encoding time on average with insignificant gain loss.Better random access performance has also been obtained.

关 键 词：多视点视频编码 预测结构 分级B帧 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]