상세정보
학술대회
Picture Quality Improvement in MPEG-4 Video Coding Using Simple Adaptive Filter
- 발행일
- 200410
- 출처
- International Conference on Multimedia (MM) 2004, pp.284-287
- 협약과제
- 04MI1600, URC용 임베디드 소프트웨어 플랫폼 및 미들웨어 개발, 김중배
- 초록
- 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.
- KSP 제안 키워드
- Adaptive filtering, Blocking artifacts, D 2, Filtering algorithms, Low Computational Complexity, MPEG-4 video, Picture quality, Quality improvement, Quality of decoded images, Sub-region, Video coding