| 图象传输误码控制信息恢复方法的研究 |
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| 引用本文： | 聂宇田,徐秉椿,俞昌.图象传输误码控制信息恢复方法的研究[J].清华大学学报(自然科学版),1997(3). |
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| 作者姓名： | 聂宇田 徐秉椿 俞昌 |
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| 作者单位： | 清华大学电子工程系，智能技术与系统国家重点实验室 |
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| 摘 要： | 图象压缩编码数据在进行传输时对信道的误码显得十分脆弱。本文针对这种情况提出了一种基于块变换和变长编码技术的压缩编码图象提高传输质量的误码控制信息恢复方法。其处理过程是：首先通过在编码码流中加入扩展同步码以将误码控制在一行之内，然后在解码端对发生差错的数据进行误码检测并采用差错信息恢复算法重建原始信息。该方法对编码器只需作很小的修改，所增加的信息冗余度很小，实验结果表明采用此方法后重建图象质量得到明显提高。
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| 关 键 词： | 图象传输 误码控制 信息恢复 |
Study on the algorithm of channel error free in still image transmission |
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| Nie Yutian,Xu Bingchun,Yu Chang.Study on the algorithm of channel error free in still image transmission[J].Journal of Tsinghua University(Science and Technology),1997(3). |
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| Authors: | Nie Yutian Xu Bingchun Yu Chang |
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| Institution: | Nie Yutian,Xu Bingchun,Yu Chang Department of Electronic Enginetring,Tsinghua University,State key Laboratory of Intelligent Technology and Systems,Beijing 100084 |
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| Abstract: | An approach of eliminating the effect of channel errors in image transmission is proposed in this paper.After the extended synchronizing codewords are introduced into the encoded bitstream, the algorithm of detecting errors and loss signal recovery is applied to reconstruct the original information from damaged data received at decoder.The approach makes little modification to the existing encoder and has the feature of rising efficiency of transmission by utilizing postprocessing techniques at decoder.The additional redundancy introduced by extended synchronizing codewords is very low.Simulation results show that subjective and objective quality of the reconstructed images is very satisfactory. |
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| Keywords: | image transmission error control information recovery |
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