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Conference Paper
A Fast Down-sampling Method for Arbitrary-ratio Spatial Scalability Based on Type-II DCT
- Authors
- Il Hong Shin, Jeong Ju Yu, Jin Woo Hong
- Issue Date
- 2008-03
- Citation
- International Conference on Acoustics, Speech and Signal Processing (ICASSP) 2008, pp.685-688
- Language
- English
- Type
- Conference Paper
- Project Code
- 07MR2900, Development of Ubiquitous Content Access Technology for Convergence of Broadcasting and Communications, Yoo Jeong Ju
- Abstract
- In a scalable video coding (SVC), spatial down/up-sampling of video sequences is an essential process for spatial scalability. We propose an arbitrary-ratio spatial down-sampling method based on the type-II DCT, with which down-sampling of H.264 SVC can be efficient. Simple windowing operation in the DCT domain is efficiently embedded in the proposed down-sampling method for aliasing reduction. A fast algorithm for arbitrary-ratio down-sampling is introduced with matrix decomposition and fast DCT. It achieves 80 % reduction of computation complexity in comparison with the direct matrix calculation. ©2008 IEEE.
- KSP Keywords
- Aliasing Reduction, DCT domain, Down-sampling, Fast DCT, H.264 SVC, Matrix calculation, Matrix decomposition, Scalable Video Coding, Spatial Scalability, Type II, computation complexity