With the study of human visual system (HVS), people find that the human eye shows different degree of sensitivity to different light signals. A higher background brightness region of the human eye for the distortion, the degree of sensitivity will be greatly reduced. The human eye’s sensitivity will be greatly reduced to the distortion of a higher brightness background region. This finding is discribed in Weber-Fechner law. Therefore, the encoder can be improved by employing this characteristic of human visual system. In this paper, the authors use this characteristic to improve the H.264 video coding algorithm. In order to improve the compression efficiency of encoder, give the brightness of different regions with different levels of quantification by adjusting the quantization step size (QP), without affecting the subjective quality of video. Experimental results show that the output bit rate decrease up to 10% -20% by using this improved algorithm in H.264 reference encoder, and the subjective quality of decoded image by using this improved algorithm is as good as the standard H.264 encoders.
목차
Abstract 1. Introduction 2. Model of Human Visual Sensitivity 3. Realization of Coding Model Based on Visual Perception 3.1 Realization in Coding Side 3.2 The Quantization Step Detection Algorithm in Decoder 4. Experimental Result and Analysis 5. Conclusion Acknowledgements References
키워드
Human visual system (HVS)Visual redundancyWeber-Fechner lawH.264Variable step
저자
Yanhui Xia [ China University of Mining & Technology (Beijing), Shijiazhuang Tiedao University ]
Baisheng Nie [ China University of Mining & Technology (Beijing) ]
Zhengyou Wang [ Shijiazhuang Tiedao University ]
Corresponding Author
Liying Li [ Shijiazhuang Tiedao University ]
Jianhua Ming [ Jiangxi University of Finance & Economics ]
Zheng Wan [ Jiangxi University of Finance & Economics ]
Shuying Huang [ Jiangxi University of Finance & Economics ]
보안공학연구지원센터(IJMUE) [Science & Engineering Research Support Center, Republic of Korea(IJMUE)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Multimedia and Ubiquitous Engineering
간기
월간
pISSN
1975-0080
수록기간
2008~2016
등재여부
SCOPUS
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Multimedia and Ubiquitous Engineering Vol.10 No.9