Down-up sampling of images is an essential process for spatial scalability of the video coding standard. We propose an efficient down-up sampling method in spatial domain using DCT kernel. The computational complexity of the proposed method is reduced by taking advantages of various symmetries of the combined DCT kernel. The proposed down-up sampling method is compared to that of MPEG-21 SVM 3.0 [ISO/IEC/JTCI 2004]. The proposed method outperforms the performance of MPEG-21 SVM 3.0 with slightly increased addition operation.
['Il-hong Shin', 'Hyun Wook Park']
Efficient down-up sampling using DCT kernel for MPEG-21 SVC