Efficient image downconversion for mixed field/frame-mode macroblocks
Sungjoo Suh, Seong Soo Chun, Myung-Hee Lee, Sanghoon Sull · Electronics Letters · 2003
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.