A novel DCT domain transcoder for transcoding video streams with half-pixel motion vectors

doi:10.1016/j.rti.2004.07.002

	A novel DCT domain transcoder for transcoding video streams with half-pixel motion vectors
	Cao, G ; Lei, ZJ ; Li, JT ; Georganas, ND ; Zhu, ZM
	2004-10-01
发表期刊	REAL-TIME IMAGING
ISSN	1077-2014
卷号	10 期号:5 页码:331-337
摘要	Video transcoding is one of the key techniques to provide heterogeneous multimedia applications with Universal Multimedia Access (UMA) service. Recently, compressed domain (DCT, Discrete Cosine Transform) transcoding architectures have been proposed to achieve fast transcoding, in which DCT domain Inverse Motion Compensation (IMC) is the most important module to reduce computational complexity. The problem of IMC has been studied for integer-pixel precision motion vectors (MVs), and, subsequently, for half-pixel precision MVs in which extra filtering, hence, extra computation is introduced. Since most current video coding standards, such as H.263, MPEG-2, etc., use half-pixel precision MVs to achieve better quality, reducing computational complexity of IMC for half-pixel MVs is important for real time fast transcoding video streams encoded by these standards. In this paper, we propose a novel half-pixel filter for IMC, which simplifies the extract operations by integrating the interpolation and translation operations into one single step. Compared to other existing half-pixel filtering algorithms, the proposed filter does not introduce any distortion and drift errors. Experimental results demonstrate that the proposed filter achieves faster transcoding than other DCT domain transcoders, and almost the same video quality as that of pixel domain transcoders. (C) 2004 Elsevier Ltd. All rights reserved.
关键词	video transcoding DCT domain transcoder translation interpolation half-pixel filter
DOI	10.1016/j.rti.2004.07.002
收录类别	SCI
语种	英语
WOS研究方向	Computer Science
WOS类目	Computer Science, Artificial Intelligence ; Computer Science, Software Engineering ; Computer Science, Theory & Methods
WOS记录号	WOS:000225875700008
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/13863
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Lei, ZJ
作者单位	1.Univ Ottawa, Sch Informat Technol & Engn, DISCOVER, Ottawa, ON, Canada 2.Chinese Acad Sci, Inst Comp Technol, DTL, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Cao, G,Lei, ZJ,Li, JT,et al. A novel DCT domain transcoder for transcoding video streams with half-pixel motion vectors[J]. REAL-TIME IMAGING,2004,10(5):331-337.
APA	Cao, G,Lei, ZJ,Li, JT,Georganas, ND,&Zhu, ZM.(2004).A novel DCT domain transcoder for transcoding video streams with half-pixel motion vectors.REAL-TIME IMAGING,10(5),331-337.
MLA	Cao, G,et al."A novel DCT domain transcoder for transcoding video streams with half-pixel motion vectors".REAL-TIME IMAGING 10.5(2004):331-337.