点击次数：

所属单位：计算机科学与技术学院/人工智能学院/软件学院

发表刊物：IEEE TRANSACTIONS ON IMAGE PROCESSING

关键字：Multi-view video plus depth coding view synthesis prediction 3D video transmission channel distortion modeling

摘要：View synthesis prediction (VSP) is a crucial coding tool for improving compression efficiency in the next generation 3D video systems. However, VSP is susceptible to catastrophic error propagation when multi-view video plus depth (MVD) data are transmitted over lossy networks. This paper aims at accurately modeling the transmission errors propagated in the inter-view direction caused by VSP. Toward this end, we first study how channel errors gradually propagate along the VSP-based inter-view prediction path. Then, a new recursive model is formulated to estimate the expected end-to-end distortion caused by those channel losses. For the proposed model, the compound impact of the transmission distortions of both the texture video and depth map on the quality of the synthetic reference view is mathematically analyzed. Especially, the expected view synthesis distortion due to depth errors is characterized in the frequency domain using a new approach, which combines the energy densities of the reconstructed texture image and the channel errors. The proposed model also explicitly considers the disparity rounding operation invoked for the sub-pixel precision rendering of the synthesized reference view. Experimental results are presented to demonstrate that the proposed analytic model is capable of effectively modeling the channel-induced distortion for MVD-based 3D video transmission.

ISSN号：1057-7149

是否译文：否

发表时间：2017-06-01

合写作者：Peng, Qiang,Xiang, Wei

通讯作者：高攀