| 基于H.264率失真模型联合码率控制算法研究 |
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| 引用本文： | 祝芳,冯乔生,徐超. 基于H.264率失真模型联合码率控制算法研究[J]. 电脑与微电子技术, 2010, 0(12): 30-33 |
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| 作者姓名： | 祝芳 冯乔生 徐超 |
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| 作者单位： | [1]云南师范大学计算机与信息学院,昆明650020 [2]北京机电研究所,北京100083 |
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| 摘 要： | 提出一种基于H.264视频压缩标准的低复杂度、高精度的码率控制算法,该算法研究建立在ρ域率失真线性模型的基础上,比较分析图像压缩前后的信息。通过统计不同量化步长q的DCT零系数百分比ρ,建立基于视频内容的ρ-q一一映射分布规律,直接把非线性R-QP控制转换为间接的R-ρ-QP控制,避免了R-QP之间的非线性影响,从而实现了基于视频内容的高精度码率控制的目的。
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| 关 键 词： | 码率控制 H.264/AVC 率失真模型 ρ域 JVT-G012 |
Research on Rate-Distortion Control Algorithm Based on H.264 R-D Model |
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| ZHU Fang,FENG Qiao-sheng,XU Chao. Research on Rate-Distortion Control Algorithm Based on H.264 R-D Model[J]. , 2010, 0(12): 30-33 |
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| Authors: | ZHU Fang FENG Qiao-sheng XU Chao |
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| Affiliation: | 1.Department of Computer and Information,Yunnan Normal University,Kunming 650020; 2.Beijing Institute of Electrical,Beijing 100083) |
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| Abstract: | Presents a novel rate-control algorithm for H.264 facing the low complexity,high-precision,this algorithm is build on the basic of the ρ-domain linear R-D model and compares and analyses the image information before and after compression.By static the different the quantization parameters（QP）DCT zero conefficent the pacent of ρ,then builds up the ρ-q video,the change the non-linear R-QP rate control with the indicate R-ρ-QP rate control,advoids the non-linear influence of R-QP,for the purpose of high-precision rate control for the video. |
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| Keywords: | Rate Control H.264/AVC R-D Model ρ-Domain JVT-G012 |
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