| 基于LDPC码的MELP语音帧不等差错保护方案 |
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| 引用本文： | 张世杰,陈利军.基于LDPC码的MELP语音帧不等差错保护方案[J].昆明理工大学学报(理工版),2011(6):46-50. |
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| 作者姓名： | 张世杰 陈利军 |
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| 作者单位： | [1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]河南经贸职业学院信息管理系,河南郑州450053 |
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| 基金项目： | 国家自然科学基金资助项目（项目编号：60832006） |
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| 摘 要： | 针对MELP编码的语音帧,提出了一个以LDPC码作为子码,基于普洛特金方式构造的分组码的不等差错保护传输方案,并对该方案在AWGN信道下进行了仿真.仿真结果表明,该方案与一般的等差错保护相比,在相同信道状况的条件下,特别是恶劣信道的情况下,对于语音质量的主观评价和客观评价都有较大提高.
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| 关 键 词： | 低密度奇偶校验码 不等差错保护 混和激励线性预测编码 多级译码 |
Unequal Error Protection of MELP Encoded Speech Based on LDPC Codes |
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| ZHANG Shi-jie,CHEN Li-jun.Unequal Error Protection of MELP Encoded Speech Based on LDPC Codes[J].Journal of Kunming University of Science and Technology(Natural Science Edition),2011(6):46-50. |
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| Authors: | ZHANG Shi-jie CHEN Li-jun |
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| Affiliation: | 1.School of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China; 2.Department of Information Management,Henan Economy and Trade Vocational College,Zhengzhou 450053,China) |
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| Abstract: | A scheme of Unequal Error Protection（UEP） is proposed for robust transmission of Mixed Excitation Linear Prediction（MELP） compressed speech,which is based on Plotkin type constructed low-density parity-check（LDPC） codes.Its performance is evaluated under Additive White Gaussian Noise（AWGN） channel,which shows that the subjective and objective assessments of speech quality after transmission are greatly improved compared with the Equal Error Protection（EEP） scheme under the same channel conditions,especially under severe channel conditions. |
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| Keywords: | LDPC UEP MELP multi-stage decoding |
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