Improved frame-layer bit allocation scheme for H.264/AVC rate control

被引：0
|
作者：
Lin G.-X. [1 ,2 ]
Zheng S.-B. [1 ,2 ]
Zhu L.-J. [3 ]
机构：
[1] Institute of Image Communication and Information Processing, Department of Electronic Engineering, Shanghai Jiaotong University
[2] Shanghai Key Laboratory of Digital Media Processing and Transmissions, Shanghai Jiaotong University
[3] Department of Automatic Control, National University of Defense Technology
来源：
Journal of Shanghai Jiaotong University (Science) | 2009年 / 14卷 / 2期
关键词：
Bit allocation; H.264/AVC; Quality degradation; Rate control;
D O I：
10.1007/s12204-009-0143-y
中图分类号：
学科分类号：
摘要：
In this paper, we aim at improving the video quality degradation due to high motions or scene changes. An improved frame-layer bit allocation scheme for H.264/AVC rate control is proposed. First, current frame is pre-encoded in 16 × 16 modes with a fixed quantization parameter (QP). The frame coding complexity is then measured based on the resulting bits and peak signal-to-ratio (PSNR) in the pre-coding stage. Finally, a bit budget is calculated for current frame according to its coding complexity and inter-frame PSNR fluctuation, combined with the buffer status. Simulation results show that, in comparison with the H.264 adopted rate control scheme, our method is more efficient to suppress the sharp PSNR drops caused by high motions and scene changes. The visual quality variations in a sequence are also relieved. Copyright.
引用
收藏
页码：143 / 148
页数：5
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