Bit Allocation for Spatial Scalability Coding of H.264/SVC With Dependent Rate-Distortion Analysis

Bit Allocation for Spatial Scalability Coding of H.264/SVC With Dependent Rate-Distortion Analysis
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具有相关率失真分析的 H.264/SVC 空间可扩展性编码的比特分配

DOI:
10.1109/tcsvt.2010.2045924
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发表时间:
2010-07
期刊:
IEEE Trans. Circuits Syst. Video Technol
影响因子:
--
通讯作者:
Zongming Guo
Zongming Guo
中科院分区:
其他
文献类型:
--
作者:
Jiaying Liu;Yongjin Cho;Zongming Guo

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提出了一种基于模型的H.264/可伸缩视频编码(SVC)空间层比特分配算法。这个问题的挑战在于,由于层间预测,增强层的率失真(R-D)行为取决于其先前层。为了解决这个问题,我们首先专注于两个空间层的情况下,推导出依赖层的失真和速率模型解析,并开发了一个低复杂度的比特分配算法。实验结果表明,本文提出的两层比特分配算法可以获得接近于基于全搜索方法的最优R-D性能的编码性能。然后,我们将这一结果扩展到多层比特分配执行两层分配方案递归。最后,我们比较了一组图片为基础的和基于帧的空间层比特分配方案在固定的时间分辨率的性能。以联合可伸缩视频模型参考软件算法和两种已有的H. 264/SVC码率控制算法为基准,验证了所提出的空间层比特分配算法的上级性能。
We propose a model-based spatial layer bit allocation algorithm for H.264/scalable video coding (SVC) in this paper. The challenge of this problem lies in the fact that the rate-distortion (R-D) behavior of an enhancement layer is dependent on its preceding layers because of inter-layer prediction. To solve it, we first focus on the case of two spatial layers, derive the distortion and rate models of the dependent layer analytically, and develop a low-complexity bit allocation algorithm. It is shown by experimental results that the proposed two-layer bit allocation algorithm can achieve the coding performance close to the optimal R-D performance based on the full search method. Then, we extend this result to multilayer bit allocation by performing the two-layer allocation scheme recursively. Finally, we compare the performance of group of pictures-based and frame-based spatial layer bit allocation schemes at a fixed temporal resolution. The superior performance of the proposed spatial layer bit allocation algorithm is demonstrated using Joint Scalable Video Model reference software algorithm and two prior H.264/SVC rate control algorithms as the benchmarks.
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