Title :
Efficient image downconversion for mixed field/frame-mode macroblocks
Author :
Suh, Sungjoo ; Chun, Seong Soo ; Lee, Myung-Hee ; Sull, Sanghoon
Author_Institution :
Dept. of Electron. & Comput. Eng., Korea Univ., Seoul, South Korea
fDate :
3/20/2003 12:00:00 AM
Abstract :
An efficient image downconversion algorithm in the compressed domain for mixed field/frame-mode macroblocks is proposed. A 16 × 16 field/frame-mode macroblock is converted into an 8 × 8 reduced block in the discrete cosine transform (DCT) domain using a modified inverse DCT (IDCT) kernel. Experimental results show that the proposed algorithm provides the downconverted image quality similar to an existing method with significantly lower computational cost.
Keywords :
discrete cosine transforms; image processing; image downconversion algorithm; mixed field/frame-mode macroblock; modified inverse discrete cosine transform kernel;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030362
