AVS变换域降分辨率快速算法  

Fast Algorithm for DCT Domain Downsampling in AVS

作　　者：赵康[1] 薛永林[1] 张妍[1] 

机构地区：[1]清华大学数字电视技术研究中心,北京100084

出　　处：《电视技术》2008年第4期16-18,共3页Video Engineering

摘　　要：研究了AVS变换域降分辨率算法,给出一个与8点整数DCT变换相对应的4点整数DCT变换核,并据此导出变换域降分辨率的快速算法。实验仿真表明,算法与时域线性内插降采样相比能够显著降低运算复杂度,视频效果也表现良好。In this paper, the algorithm of DCT domain downsampling in AVS is researched. A 4×4 integer transform core based on 8×8 integer DCT transform in AVS is proposed, and thus a fast algorithm of downsampling in DCT do main is derived. The simulation results show that compared with cinear interpolation downsampling in time domain, the proposed algorithm can dramatically reduce computational complexity, while the performance of video sequence is considerably good.

关 键 词：AVS标准 整数DCT变换 降采样 

分 类 号：TN919.81[电子电信—通信与信息系统]