| 基于率失真优化的H.264参考帧选择算法 |
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| 引用本文： | 唐浩漾,王曙光,赵洪钢.基于率失真优化的H.264参考帧选择算法[J].西安邮电学院学报,2014(4):31-35. |
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| 作者姓名： | 唐浩漾 王曙光 赵洪钢 |
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| 作者单位： | [1]西安邮电大学自动化学院,陕西西安710121 [2]西安通信学院信息服务系,陕西西安710106 |
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| 基金项目： | 国家自然科学基金资助项目（60902052）;陕西省自然科学基金资助项目（2012JM8022,2011JM8003）;陕西省教育厅自然科学基金资助项目（12JK0540） |
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| 摘 要： | 为了有效抑制H.264/AVC压缩视频流的传输错误扩散,提出一种基于率失真优化的H.264参考帧选择算法。该算法针对H.264/AVC中的多种预测模式,在像素级准确估计了差错环境下的视频传输失真,并将该失真模型与率失真优化准则结合,在率失真框架内选择最合适的参考帧,使解码段的失真度达到最小。实验结果表明,改进算法相比传统的预测编码方法PSNR值大约提高了12dB,能有效改善H.264视频传输的抗差错性能。
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| 关 键 词： | 视频编码 参考帧选择 率失真优化 端到端失真 |
A novel reference frame selection algorithm for H .264 based on rate-distortion optimization |
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| TANG Haoyang,WANG Shuguang,ZHAO Honggang.A novel reference frame selection algorithm for H .264 based on rate-distortion optimization[J].Journal of Xi'an Institute of Posts and Telecommunications,2014(4):31-35. |
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| Authors: | TANG Haoyang WANG Shuguang ZHAO Honggang |
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| Affiliation: | 1. School of Automation, Xi＇an University of Posts and Telecommunications, Xi＇an 710121, China; 2. Department of Information Service, Xi＇an Communication College, Xi＇an 710106, China) |
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| Abstract: | To improve the error resilient performance of video data over error-prone channel,a novel reference frame selection algorithm for H.264 based on rate-distortion optimization is pro-posed in this paper.Combined with various modes prediction of H.264/AVC,a recursive optimal per-pixel estimate algorithm is used to estimate the end-to-end reconstructed distortion.Then based on the distortion estimation model and the rate-distortion optimization rule,the best suit-able reference frame is chosen to minimize the decoder distortion.Simulation results indicate that the proposed algorithm can increase about 1~2 dB performance gains and get better error resili-ent performance comparing with traditional prediction coding algorithms. |
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| Keywords: | video coding reference frame selection rate-distortion optimization end-to-end dis-tortion |
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