An efficient H.264 rate control scheme with accurate θ estimation

被引：0
|
作者：
Chen Qingde [1 ]
Hu Dong [1 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Prov Key Lab Image Proc & Image Commun, Nanjing 210003, Peoples R China
来源：
PROCEEDINGS OF THE FOURTH INTERNATIONAL CONFERENCE ON IMAGE AND GRAPHICS | 2007年
基金：
美国国家科学基金会;
关键词：
D O I：
10.1109/ICIG.2007.162
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
An efficient role control scheme for H.264 encoding has been proposed, where rho domain source modeling, which was first used in block-based DCT coding system such as H.263, MPEG-2 and MPEG-4, is introduced For accurate rate control, parameter theta, the slope of the linear function of bit rate R vs. rho, should be estimated in advance for each frame. Least-Mean-Square (LMS) algorithm is adopted for the estimation of theta, which is further refined by a new factor theta-ratio for each frame. Simulation results for standard test sequences show that, compared with JVT-H017, the new algorithm achieves better coding performance, while the output bit rates are more accurate.
引用
收藏
页码：274 / +
页数：2
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