| 一种音频信息的时域非均匀误码保护算法 |
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| 引用本文： | 毛倩,徐军军,董德存.一种音频信息的时域非均匀误码保护算法[J].计算机科学,2010,37(10):89-91. |
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| 作者姓名： | 毛倩 徐军军 董德存 |
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| 作者单位： | 1. 上海理工大学光电信息与计算机工程学院,上海,200093
2. 同济大学交通运输工程学院,上海,200092 |
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| 基金项目： | 本文受863项目(2007AA11Z247)，上海市科委课题(08201202100)资助。 |
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| 摘 要： | 提出了一种基于循环不等保护码的音频可靠性传输方法。循环不等保护码通过一次编译码为音频信号的不同信息位提供两个误码保护等级f1,f2(f1>f2) 。译码时如果一个码字内的误比特数小于或等于f2，则采用循环码的一般译码算法译码;误比特数大于f2，则通过对f2子空间校正子的计算对高保护等级的信息位实现f1的误码保护。本方法可应用到音频编解码器的设计中。实验表明本方法能有效提高音频传输可靠性，一定噪声下语音信号的SNR值提高了2~5dB，并具有良好的听觉效果。
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| 关 键 词： | 音频传输，不等保护，信噪比 |
| 收稿时间： | 2009/11/12 0:00:00 |
| 修稿时间： | 2010/1/29 0:00:00 |
Time-domain Non-uniform Error Protection Algorithm of Audio Information |
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| MAO Qian,XU Jun-jun,DONG De-cun.Time-domain Non-uniform Error Protection Algorithm of Audio Information[J].Computer Science,2010,37(10):89-91. |
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| Authors: | MAO Qian XU Jun-jun DONG De-cun |
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| Affiliation: | (College oI Optical-ElectrcrInformation and Computer Engineering,University oI Shanghai for Science and Technology,Shanghai 200093,China)(School of Transportation Engineering,Tongji University,Shanghai 200092,China) |
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| Abstract: | A new method about audio safe transmission based on unequal error protection codes was proposed. Unequal error protection codes provide two levels of error-correcting capabilities: f1 and f2(f1>f2) for the different audio information bit with once codec. If the number of error bits less than or equal to f2 in the decoding process,a common decoding algorithm is adopt, then provides high protection lever with the error-correcting capabilities f1 by computing the syndromes of the sulrcodespace of f2.It's suitable for better audio codec design. Simulation shows that this method improves the security transmission of the audio signal. Under a certain noise the SNR value of the audio signal is obviously advanced and has a good hearing effect |
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| Keywords: | Audio transmission Unequal error protection SNR |
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