Institute of Computing Technology, Chinese Academy IR
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. |
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