文章基本信息

标题：超高精細映像におけるマクロブロックサイズ拡張手法に関する解析的考察
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作者：吉野知伸 ; 内藤整 ; 酒澤茂之等
期刊名称：映像情報メディア学会誌
印刷版ISSN：1342-6907
电子版ISSN：1881-6908
出版年度：2010
卷号：64
期号：11
页码：1698-1710
DOI：10.3169/itej.64.1698
出版社：The Institute of Image Information and Television Engineers
摘要：Ultra-high resolution video is expected to be one of the next-generation high quality video formats. Current video coding technology H.264 achieves the maximum amount of coding efficiency from among the existing coding standards. However, even H.264 is not sufficient enough for ultra-high resolution video distribution service due to a lack of coding efficiency. Therefore, an enhanced video coding technology is strongly required to improve the coding efficiency. In the past works, several approaches for extending the macroblock (MB) size have been proposed, and these researches showed that extended MB size technology improved the coding efficiency, especially for high resolution video. However, a clear description of the performance improvement mechanism has yet to be presented. We analytically consider the coding characteristics of an extended MB size scheme for ultra-high resolution video in this paper. We clarified the coding gain mechanism of this technology based on a R-D characteristics analysis. Furthermore, we analytically confirmed that the extended MB size scheme was most effective at high-resolution and low-bitrate video coding. Finally, we conducted a coding experiment and found that the maximum bit reduction ratio reached approximately 15% using an optimal coding control for the extended MB size scheme.
关键词：超高精細映像;8K映像;マクロブロックサイズ拡張;圧縮符号化方式