矿井无线透地通信中语音压缩技术探讨  

Voice Compression Technology in Wireless Through-the-earth Communication in Mines

作　　者：赵红玉 彭慧 

机构地区：[1]喀什大学物理与电气工程学院,新疆喀什844000

出　　处：《山西煤炭》2015年第6期14-16,共3页Shanxi Coal

摘　　要：针对矿井透地无线通信中语音传输存在的噪声干扰大、传输信道窄、实际传输距离有限等特点,通过比较现阶段的语音压缩技术,提出增量调制(delta modulation,DM)及其改进方案自适应增量调制(adaptive delta modulation,ADM)不适宜作为透地无线通信语音压缩的压缩编码方案;语音压缩感知(Compressed Sensing)作为一种新近提出的压缩编码方案,能够以远低于奈奎斯特采样速率采样压缩信号,虽然语音重建质量有限,编码复杂,技术难度高,目前不适宜作为透地无线通信语音压缩编码的方案,但是可能成为未来无线通信压缩技术;码激励线性预测CELP(Code Excited Linear Prediction coding)比较适合作为透地无线通信语音压缩编码方案。Voice transmission in wireless through-the-earth communication in mines has problems as high noise, narrow channel, and limited real transmission distance. Compared with the present voice compression technology, the study proposes delta modulation（DM） and its improvement scheme. Adaptive delta modulation（ADM） is not suitable for the compression coding in the voice compression. Compressing sensing of voice, as a new coding, could compress the signal with sampling rate much less than Nyquist rate, but it is not appropriate to be the voice compression coding in the wireless through-the-earth communication for the time being, with limited quality of reconstructed speech, complex coding, and difficult technology. However, it is promising in the future. Code excited linear prediction coding（CELP） is more appropriate to be the voice compression coding scheme for wireless through-the-earth communication.

关 键 词：透地无线通信 语音压缩 ADM DM CELP 压缩感知 

分 类 号：TD655[矿业工程—矿山机电]