Regularized dequantizer for MPEG

Based on regularization principles, we dequantization scheme for MPEG. The new approach drastically reduces blocking artifacts without smoothing the d ecoded image. Most discrete cosine transform (DCT) based video coding suffe r from blocking artifacts where boundaries of 8 x 8 DCT blocks become visib le on decoded images. The blocking artifacts become more prominent as the b it rate is lowered. In this paper, we present a new dequantization techniqu e for discrete cosine transform (DCT) based encoding to sharply reduce the blocking artifacts. Our proposed dequantization scheme, through regularizat ion, sharply reduces blocking artifacts in decoded images. The performance of the proposed algorithm will be evaluated against the standard MPEG decod ing. The comparison will show visual improvements as well as numerical impr ovements in terms of the peak-signal-to-noise ratio (PSNR) and the blockine ss measure (BM) to be defined.