Multiple Description Coding for Stereoscopic Videos With Stagger Frame Order

Multiple Description Coding for Stereoscopic Videos With Stagger Frame Order
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具有交错帧顺序的立体视频的多重描述编码

DOI:
10.1109/tcsvt.2014.2367391
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发表时间:
2015-06
影响因子:
8.4
通讯作者:
Jimin Xiao
Jimin Xiao
中科院分区:
工程技术1区
文献类型:
--
作者:
林春雨;Yao Zhao;Tammam Tillo;Jimin Xiao

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由于视频编码中采用的预测结构,一个数据包的丢失将影响许多后续帧。本文提出了一种适用于立体三维视频的交错帧顺序多描述编码方案。首先,立体序列中的参考视图和辅助视图将被不对称地编码到一个描述中,而另一个描述将以相同的方式用一个哑帧延迟形成。由于交错帧顺序,粗编码的B帧将被插入到两个描述的不同位置。如果用I/P模式编码的某个帧丢失,则将采用其对应的B帧版本来补偿该丢失。在每个描述中,基于考虑视频内容、网络状态、图片组中的帧位置和视图层的封闭形式解决方案来调整B帧的量化步长。为了进一步改进,提供了一种融合方案。实验结果表明,该方案优于国家的最先进的计划。具体地,在分组丢失的情况下实现了高达1.3 dB的增益,并且对于侧/中心性能获得了2 dB的增益。
Due to the prediction structures employed in video coding, the loss of one packet will affect many following frames. In this paper, a multiple description coding scheme with stagger frame order is proposed for stereoscopic 3-D videos. First, the reference and auxiliary views in stereoscopic sequences will be asymmetrically encoded into one description, whereas the other description will be formed in the same way with one dumb frame delay. Because of the stagger frame order, the coarsely encoded B frames will be inserted into different positions of the two descriptions. If a certain frame encoded with I/P mode is lost, then its corresponding B-frame version will be employed to compensate for the loss. In each description, the quantization steps of B frames are tuned based on a closed-form solution that considers the video contents, network status, frame positions in the group of picture, and the layer of the views. For further improvement, a fusing scheme is provided. The experimental results demonstrate that the proposed scheme outperforms state-of-the-art schemes. Specifically, up to 1.3-dB gain is achieved in the case of packet loss, and 2-dB gain is obtained for the side/central performance.
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