文章基本信息

标题：適応的画像方向反転を利用したH.264/AVC拡張符号化方式
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作者：村上智一 ; 軽部勲 ; 伊藤浩朗等
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：2008
卷号：62
期号：11
页码：1762-1767
DOI：10.3169/itej.62.1762
出版社：The Institute of Image Information and Television Engineers
摘要：We have developed a new video coding method called adaptive picture direction inversion coding (APDIC) that improves coding efficiency by utilizing the dependency of the spatial direction of images in intra/inter coding. This method involves inverting the direction of input pictures horizontally and/or vertically, and then selecting the best pattern by using a rate-distortion optimization method. Decoders can identify the selected inverting pattern by using an "invert flag" in the bitstream so that they can decode the sequence in the right position. We implemented APDIC into a H.264/AVC based video encoder. The experimental results show that the bitrate obtained using this method is reduced by up to 4.3% for natural image sequences and 7.6% for the most typical artificial images.
关键词：画像方向反転;H.264/AVC;動画像符号化;Rate-Distortion最適化;イントラ予測