| 针对LDPC信道编码的无线视频传输性能分析 |
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| 引用本文： | 仲丽媛,荆涛,牛青青,霍炎.针对LDPC信道编码的无线视频传输性能分析[J].铁路计算机应用,2010,19(7):1-4. |
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| 作者姓名： | 仲丽媛 荆涛 牛青青 霍炎 |
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| 作者单位： | 北京交通大学,电子信息工程学院,北京,100044 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 本文对H.264压缩视频使用低密度奇偶校验码(LDPC)信道编码策略,分别在加性高斯白噪声、随机误码以及瑞利平坦衰落3种无线信道传输环境下,从信噪比和误码率等信道特性与重建视频质量之间的关系分析无线视频的传输性能.结果表明:无线信道状态不稳定使视频解码质量产生较大波动,且不同数据段误码对视频解码质量的影响不同.此外LDPC码在3种信道下均具有较强的抗传输差错能力.这些分析结果对无线视频传输技术的研究与设计具有一定的参考价值.
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| 关 键 词： | 无线视频传输 随机误码信道 加性高斯白噪声信道 瑞利平坦衰落信道 |
| 收稿时间： | 2010-07-15 |
Analysis of wireless video transmission performance using LDPC code |
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| ZHONG Li-yuan,JING Tao,NIU Qing-qing,HUO Yan.Analysis of wireless video transmission performance using LDPC code[J].Railway Computer Application,2010,19(7):1-4. |
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| Authors: | ZHONG Li-yuan JING Tao NIU Qing-qing HUO Yan |
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| Institution: | (School of Electronics and Information Engineering,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | Using LDPC for H.264,wireless video transmission performance was analyzed from the relationship between channel characteristics and reconstruction quality in Additive White Gaussian Noise（AWGN）,random errors and Rayleigh fading channels respectively.The results showed that the wireless channel state was so changeful that the reconstruction quality fluctuated markedly,and the error bits in different frame had different impact on the reconstruction quality.Besides LDPC codes had strong capacity for error correction.Those would have reference value for studying and designing wireless video transmission technology. |
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| Keywords: | wireless video transmission random error channel Additive White Gaussian Noise（AWGN） channel Rayleigh flat fading channel |
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