tailieunhanh - Báo cáo hóa học: " Research Article On Optimizing H. 264/AVC Rate Control by Improving R-D Model and Incorporating HVS Characteristics"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: IResearch Article On Optimizing H. 264/AVC Rate Control by Improving R-D Model and Incorporating HVS Characteristics | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 830605 10 pages doi 2010 830605 Research Article On Optimizing H. 264 AVC Rate Control by Improving R-D Model and Incorporating HVS Characteristics Zhongjie Zhu 1 Yuer Wang 1 Yongqiang Bai 1 and Gangyi Jiang2 1 Ningbo Key Laboratory of DSP Zhejiang Wanli University Ningbo 31 51 00 China 2 Institute of Circuits and Systems Ningbo University Ningbo 315211 China Correspondence should be addressed to Zhongjie Zhu zhongjiezhu@ Received 18 March 2010 Revised 4 July 2010 Accepted 24 August 2010 Academic Editor Lisimachos P. Kondi Copyright 2010 Zhongjie Zhu et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. The state-of-the-art JVT-G012 rate control algorithm of is improved from two aspects. First the quadratic ratedistortion R-D model is modified based on both empirical observations and theoretical analysis. Second based on the existing physiological and psychological research findings of human vision the rate control algorithm is optimized by incorporating the main characteristics of the human visual system HVS such as contrast sensitivity multichannel theory and masking effect. Experiments are conducted and experimental results show that the improved algorithm can simultaneously enhance the overall subjective visual quality and improve the rate control precision effectively. 1. Introduction Rate control plays an important role in the field of video coding and transmission which has been extensively studied in the literature. Strictly speaking rate control technology is not a normative part of video coding standards. However due to its importance for video coding and transmission rate control has been widely studied and several rate control algorithms have been proposed for .