| DCT域视频转码技术综述 |
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| 引用本文： | 杜耀刚,蔡安妮. DCT域视频转码技术综述[J]. 电子学报, 2005, 33(9): 1644-1650 |
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| 作者姓名： | 杜耀刚 蔡安妮 |
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| 作者单位： | 北京邮电大学电信工程学院,北京,100876;北京电子科技学院基础部,北京,100070;北京邮电大学电信工程学院,北京,100876 |
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| 基金项目： | 国家自然科学基金，北京电子科技学院校科研和教改项目 |
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| 摘 要： | 随着数字视频技术的广泛应用,实现各种视频编码格式之间转码的要求越来越迫.视频转码是数字媒体网络网关的关键技术.本文从DCT域视频转码的体系结构、关键技术及最优转码策略三个方面,介绍了现有的各种算法,分析和总结了各自的特点,提出了DCT域视频下采样帧内刷新体系结构和最优视频转码策略解的概念,并指出了下一步的研究方向.
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| 关 键 词： | DCT域视频转码 率失真 最优转码策略 帧内刷新 |
| 文章编号： | 0372-2112（2005）09-1644-07 |
| 收稿时间： | 2004-10-29 |
| 修稿时间： | 2004-10-292005-06-03 |
Overview of the Video Transcoding Techniques in DCT Domain |
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| DU Yao-gang,CAI An-ni. Overview of the Video Transcoding Techniques in DCT Domain[J]. Acta Electronica Sinica, 2005, 33(9): 1644-1650 |
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| Authors: | DU Yao-gang CAI An-ni |
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| Affiliation: | 1. Telecommnication Engineering School,Beijing University of Posts & Telecommunications,Beijing 100876,China;2. Foundation Department Beijing Institute of Electronic Science and Technology,Beijing 100070,China |
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| Abstract: | With widely applications of digital video,the requirement of video transcoding is very exigent.Video transcoding is defined as the conversion of one coded video format to another and becomes a key technique of digital multimedia network gateway.In this paper,a survey on video transcoding in DCT-domain,including several typical architectures,key techniques and an optimal transcoding strategy,and various existing algorithms to analyze their advantages and disadvantages respectively are presented.An intrablock refreshing architecture for reduced spatial resolution transcoding in DCT domain and a soluton of an optimal transcoding strategy are introduced.Several research aspects in the future are proposed. |
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| Keywords: | video transcoding in DCT domain rate-distortion an optimal transcoding strategy intra-refresh |
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