Early DIRECT mode decision based on all‐zero block and rate distortion cost for multiview video coding. Issue 1 (1st January 2016)

• Record Type: Journal Article
• Authors: Pan, Zhaoqing; Zhang, Yun; Lei, Jianjun; Xu, Long; Sun, Xingming
• Is Part Of: IET image processing. Volume 10:Issue 1(2016)
• Page Start: 9
• Page End: 15
• Publication Date: 2016-01-01
• Subjects: video coding -- rate distortion theory -- computational complexity -- redundancy; early DIRECT mode decision algorithm -- all‐zero block -- rate distortion cost -- multiview video coding -- exhaustive variable‐block‐size mode decision -- redundancy removal -- computational complexity -- MVC encoder -- real‐time multimedia applications -- MB spatial‐temporal -- macroblock spatial‐temporal -- time saving -- RD performance degradation; Image processing -- Periodicals; 621.36705
• DOI: 10.1049/iet-ipr.2014.1018
• Languages: English
• ISSNs: 1751-9659

Abstract

Abstract : The exhaustive variable‐block‐size mode decision can efficiently remove the redundancies among the multiview videos, while it also leads to significant increase of computational complexity in the multiview video coding (MVC) encoder, and the high encoding complexity becomes a bottleneck for the MVC encoder to achieve real‐time multimedia applications. To address this bottleneck, many fast mode decision methods have been proposed. However, most of them are only suitable for optimising the encoding complexity of the odd views of the MVC encoder. In this study, based on the property of the all‐zero block and rate distortion (RD) cost of the DIRECT mode as well as the correlations between the current macroblock (MB) and its spatial–temporal nearby MBs, an early DIRECT mode decision method is proposed for reducing the encoding complexity of the MVC. Experimental results show that the proposed method achieves 48.25 and 55.64% on average encoding time saving for the even and odd views, respectively, whereas the RD performance degradation is quite acceptable. In summary, the proposed method efficiently reduces the encoding complexity for the MVC encoder.