| Improved side information generation algorithm for Wyner-Ziv video coding简 |
| |
| 作者姓名： | ZHANG Deng-yin WU Yuan-yuan WAN Ming-xiang |
| |
| 基金项目： | supported by the National Natural Science Foundation of China（61071093）; the Hi-Tech Research and Development Program of China（2010AA701202）; the Sweden-Asian International Cooperation Project（348-2008-6212）; the Jiangsu Province Major Technology Support Program（BE2012849）; the Jiangsu Province IOT Application Demonstration Project（SJ212025）; the SRF for ROCS,SEM（NJ209002）; the Jiangsu Province Scientific and Technological Innovation Projects（CXLX12_0481） |
| |
| 摘 要： | Side information has a significant influence on the rate-distortion（RD） performance of distributed video coding（DVC）. In the conventional motion compensated frame interpolation scheme, all blocks adopt the same side-information generation method regardless of the motion intensity inequality at different regions. In this paper, an improved method is proposed. The image blocks are classified into two modes, fast motion and slow motion, by simply computing the discrete cosine transformation（DCT） coefficients at the encoder. On the decoder, it chooses the direct interpolation and refined motion compensated interpolation correspondingly to generate side information. Experimental results show that the proposed method, without increasing the encoder complexity, can increase the average peak signal-to-noise ratio（PSNR） by up to 1~ 2 dB compared with the existing algorithm. Meanwhile, the proposed algorithm significantly improves the subjective quality of the side information.
|
| 关 键 词： | 生成算法 视频编码 边信息 运动补偿 离散余弦变换 生成方法 运动强度 直接插补 |
| 收稿时间： | 7 August 2013 |
Improved side information generation algorithm for Wyner-Ziv video coding |
| |
| ZHANG Deng-yin,WU Yuan-yuan,WAN Ming-xiang.Improved side information generation algorithm for Wyner-Ziv video coding[J].The Journal of China Universities of Posts and Telecommunications,2014,21(1):109-115. |
| |
| Authors: | ZHANG Deng-yin WU Yuan-yuan WAN Ming-xiang |
| |
| Affiliation: | [1]Sci-Tech Park of lntemet of Things, Nanjing University of Posts and Telecommunication, Nanjing 210003, China [2]Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunication, Nanjing 210003, China |
| |
| Abstract: | Side information has a significant influence on the rate-distortion (RD) performance of distributed video coding (DVC). In the conventional motion compensated frame interpolation scheme, all blocks adopt the same side-information generation method regardless of the motion intensity inequality at different regions. In this paper, an improved method is proposed. The image blocks are classified into two modes, fast motion and slow motion, by simply computing the discrete cosine transformation (DCT) coefficients at the encoder. On the decoder, it chooses the direct interpolation and refined motion compensated interpolation correspondingly to generate side information. Experimental results show that the proposed method, without increasing the encoder complexity, can increase the average peak signal-to-noise ratio (PSNR) by up to 1∼ 2 dB compared with the existing algorithm. Meanwhile, the proposed algorithm significantly improves the subjective quality of the side information. |
| |
| Keywords: | DVC side information motion estimation motion compensation |
| 本文献已被 CNKI 维普 ScienceDirect 等数据库收录！ |
