| 面向质量域可分级视频编码的自适应模式选择算法 |
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| 引用本文： | 常侃,覃团发,唐振华,郑嘉利. 面向质量域可分级视频编码的自适应模式选择算法[J]. 北京邮电大学学报, 2011, 34(Z1): 95-99 |
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| 作者姓名： | 常侃 覃团发 唐振华 郑嘉利 |
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| 作者单位： | 广西大学计算机与电子信息学院; |
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| 基金项目： | 广西自然科学基金重点项目(2011GXNSFD018024); 广西高校人才小高地建设创新团队资助计划项目(桂教人[2007]71号); 广西大学博士科研启动基金(DD060067) |
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| 摘 要： | 为减轻质量域可分级视频编码的计算复杂度，提出了一种快速模式选择算法.该算法将模式选择流程分为3个阶段：首先检测运算复杂度低、出现概率大的跳过类模式集合；依据层间相关性和空域相关性选择性检测候选编码模式集合；最后遍历检测剩余编码模式.若第1或第2阶段所获得的最小码率-失真代价值小于预先定义的门限，则提前结束模式选择流程.仿真结果证明，与全遍历算法相比，新算法可以获得459%~808%的编码速度提升；峰值信噪比降低最多为015 dB，码率增加最多为062%.
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| 关 键 词： | H264 可分级视频编码扩展； 层间预测； 模式选择 |
Context-Adaptive Mode Decision Algorithm for Scalable Video Coding with Quality Scalability |
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| CHANG Kan,QIN Tuan-fa,TANG Zhen-hua,ZHENG Jia-li. Context-Adaptive Mode Decision Algorithm for Scalable Video Coding with Quality Scalability[J]. Journal of Beijing University of Posts and Telecommunications, 2011, 34(Z1): 95-99 |
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| Authors: | CHANG Kan QIN Tuan-fa TANG Zhen-hua ZHENG Jia-li |
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| Affiliation: | CHANG Kan,QIN Tuan-fa,TANG Zhen-hua,ZHENG Jia-li (School of Computer and Electronic Information,Guangxi University,Nanning 530004,China) |
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| Abstract: | To reduce the computational complexity of quality scalable video coding(SVC),a three steps included fast mode decision algorithm is proposed.In the first step,skip modes which require little computational complexity are checked;afterwards,candidate modes are selectively searched according to the inter-layer correlation;finally,the rest un-checked modes are calculated.If the minimal Rate-Distortion(R-D) cost obtained in the first or the second step is smaller than the predefined threshold,early termination i... |
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| Keywords: | H.264 scalable video coding inter-layer prediction mode decision |
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