Title :
Motion vector refinement for video downsampling in the DCT domain
Author :
Seo, Kwang-deok ; Kim, Jae-kyoon
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Taejeon, South Korea
Abstract :
This letter presents a fast motion vector refinement (MVR) for video downsampling in the discrete cosine transform (DCT) domain. To reduce the computational complexity of the MVR, we propose a fast search algorithm, based on minimizing the number of required checkpoints, and a computationally efficient method for extracting the motion-compensated DCT (MC-DCT) block. Compared to the known extraction method of the MC-DCT block, the proposed method requires fewer than one-half the multiplications and additions.
Keywords :
discrete cosine transforms; matrix multiplication; motion compensation; video signal processing; DCT domain; MC-DCT block; computational complexity reduction; computationally efficient method; discrete cosine transform; fast motion vector refinement; fast search algorithm; motion-compensated DCT block; video downsampling; Computational complexity; Decoding; Delay effects; Discrete cosine transforms; Energy conservation; MPEG standards; Motion compensation;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2002.804422
