Enhanced reconstruction algorithm for unidirectional distributed video coding
Enhanced reconstruction algorithm for unidirectional distributed video coding
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DOI：
10.1049/iet-ipr.2008.0195
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发表时间：
2009-12
期刊：
影响因子：
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通讯作者：
W. Weerakkody;W. Fernando;A. Kondoz
中科院分区：
文献类型：
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作者：
W. Weerakkody;W. Fernando;A. Kondoz
分布式视频编码(DVC)是一种新兴的视频编码技术，它利用分布式信源编码原理来构建非常低成本的视频编码器，并且具有显著的容错能力。在最常见的DVC框架中，重建功能起着至关重要的作用，直接影响到输出视频的质量。在这项研究中，提出了一种新的重建函数算法，特别是针对一种单向DVC结构。该技术利用了Wyner-Ziv解码码流误码率的变化和边信息流中假设的噪声模型。仿真结果表明，该算法在不增加码率代价的情况下，明显改善了视频的主客观质量。
Distributed video coding (DVC) is an emerging video coding technology that utilises the distributed source coding principles to build very low cost video encoders, yet with remarkable error resilience. In the most common DVC framework, the reconstruction function plays a vital role that has a direct impact on the output video quality. In this study, a novel algorithm is proposed for the reconstruction function, particularly focusing on a unidirectional DVC architecture. The proposed technique exploits the variations of the bit error rate of the Wyner-Ziv decoded bit stream and the assumed noise model in the side information stream. The simulation results show that the proposed algorithm yields a significant improvement of the objective and subjective video quality at no additional bit rate cost.