Paper Info
Title
Picture quality improvement in MPEG-4 video coding using simple adaptive filter
Abstract
In this paper, we propose a novel post-filtering algorithm with low computational complexity that improves the visual quality of decoded images using block boundary classification and simple adaptive filter (SAF). At first, each block boundary is classified into smooth or complex sub-region. And for smooth-smooth sub-regions, the existence of blocking artifacts is determined using blocky strength. Simple adaptive filtering is processed in each block boundary. The proposed method processes adaptively, that is, a nonlinear 1-D 8-tap filter is applied to smooth-smooth sub-regions with blocking artifacts, and for smooth-complex or complex-smooth sub-regions, a nonlinear 1-D variant filter is applied to block boundary pixels so as to reduce the blocking and ringing artifacts. And for complex-complex sub-regions, a nonlinear 1-D 2-tap filter is only applied to adjust two block boundary pixels so as to preserve the image details. Experimental results show that the proposed algorithm produced better results than those of the conventional algorithms both subjective and objective viewpoints.
Year
DOI
Venue
2004
10.1145/1027527.1027592
ACM Multimedia 2001
Keywords
Field
DocType
conventional algorithm,complex-smooth sub-regions,mpeg-4 video,1-d 2-tap filter,smooth-smooth sub-regions,block boundary,picture quality improvement,1-d 8-tap filter,1-d variant filter,simple adaptive filter,block boundary classification,complex-complex sub-regions,deblocking,adaptive filter,computational complexity,quality improvement,mpeg 4
Ringing artifacts,Computer vision,Computer science,Image quality,Kernel adaptive filter,Adaptive filter,Pixel,Artificial intelligence,Multidelay block frequency domain adaptive filter,Multimedia,MPEG-4,Deblocking filter
Conference
ISBN
Citations 
PageRank 
1-58113-893-8
0
0.34
References 
Authors
4
3
Name
Order
Citations
PageRank
Kee-Koo Kwon1256.26
Sung-Ho Im271.60
Dongsun Lim3113.11