Abstract: 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 improved. 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.

Key words: Multi-view Video Coding（MVC）, prediction structure, hierarchical B picture

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。

关键词: 多视点视频编码, 预测结构, 分级B帧