| 可伸缩视频编码中基于部分解码的率失真优化 |
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| 引用本文： | 黄爱爱,陈耀武.可伸缩视频编码中基于部分解码的率失真优化[J].光学精密工程,2011,19(9):2170-2176. |
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| 作者姓名： | 黄爱爱 陈耀武 |
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| 作者单位： | 浙江大学数字技术及仪器研究所,浙江杭州,310027 |
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| 基金项目： | 浙江省重大科技攻关项目(No.2006C11200No.2009C11035) |
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| 摘 要： | 在可伸缩视频编码系统中,原始码流经过裁剪可以提取出多个子码流.为了联合优化原始码流和子码流的编码质量,提出了基于部分解码的率失真优化算法.首先,在增强层的率失真计算中,通过对离散余弦变换(DCT)系数进行有选择截断来估计子码流对编码的影响,并建立误差扩散失真图对部分解码引起的误差扩散进行预测.在基本层的率失真计算中,针...
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| 关 键 词： | 可伸缩视频编码 率失真优化 部分解码 漂移误差 |
Rate distortion optimization based on partial decoding for scalable video coding |
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| HUANG Ai-ai,CHEN Yao-wu.Rate distortion optimization based on partial decoding for scalable video coding[J].Optics and Precision Engineering,2011,19(9):2170-2176. |
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| Authors: | HUANG Ai-ai CHEN Yao-wu |
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| Affiliation: | HUANG Ai-ai,CHEN Yao-wu* (Institute of Advanced Digital Technology and Instrumentation,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | In scalable video coding,the original bit-stream can be cropped and generate multiple sub-bit-streams.In order to optimize coding efficiency of both the original bit-stream and the sub-bit-streams,partial decoding based on a Rate Distortion Optimization(RDO) algorithm is proposed.In the enhancement layer's RDO process,the influence of sub-bit-streams on coding efficiency is predicted by selectively truncating Discrete Cosine Transform(DCT) coefficients.The propagation distortion map is then used to estimate... |
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| Keywords: | scalable video coding rate distortion optimization partially decoding drift error |
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