A fast scheme for converting DCT coefficients to H.264/AVC integer transform coefficients

	A fast scheme for converting DCT coefficients to H.264/AVC integer transform coefficients
	Chen, Gao; Lin, Shouxun; Zhang, Yongdong
	2006
发表期刊	IMAGE ANALYSIS AND RECOGNITION, PT 1
ISSN	0302-9743
卷号	4141 页码:559-570
摘要	Converting MPEG-2 8-tap discrete cosine transform (DCT) coefficients to H.264/AVC 4-tap integer transform (IT) coefficients is one of the indispensable operations for MPEG-2 to H.264 transform domain transcoding. In this paper, we propose a novel transform kernel matrix based on the factorization of DCT to perform this operation directly in transform domain. Furthermore, additional reduction in computation can be obtained by taking advantage of the fact that most of the 8x8 DCT blocks in real video sequences only have nonzero coefficients in the upper left 4x4 quadrant. Relative to Jun Xin's method, the proposed method saves 16 operations in the worst case and 440 operations in the best case for each 8x8 DCT block. Experimental results also show that the proposed method efficiently reduces the computational cost up to 42.9% with negligible degradation in video quality. Hence, the proposed method can be efficiently used in the real-time and high capacity MPEG-2 to H.264 transform domain transcoding.
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, Theory & Methods
WOS记录号	WOS:000241552700052
出版者	SPRINGER-VERLAG BERLIN
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/10547
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Chen, Gao
作者单位	Chinese Acad Sci, Inst Comp Technol, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Chen, Gao,Lin, Shouxun,Zhang, Yongdong. A fast scheme for converting DCT coefficients to H.264/AVC integer transform coefficients[J]. IMAGE ANALYSIS AND RECOGNITION, PT 1,2006,4141:559-570.
APA	Chen, Gao,Lin, Shouxun,&Zhang, Yongdong.(2006).A fast scheme for converting DCT coefficients to H.264/AVC integer transform coefficients.IMAGE ANALYSIS AND RECOGNITION, PT 1,4141,559-570.
MLA	Chen, Gao,et al."A fast scheme for converting DCT coefficients to H.264/AVC integer transform coefficients".IMAGE ANALYSIS AND RECOGNITION, PT 1 4141(2006):559-570.