【摘要】 根据水声通信的复杂信道特性,对混合激励线性预测语音编码MELP算法和低密度奇偶校验码LDPC的结合进行了研究,设计了基于ARM+DSP的多载波水声实时语音通信样机。经水池实验测试,系统表现出良好的实时性和语音可懂度性能,可分辨出不同说话人的声音。更多还原

【Abstract】 Taking the complexity of the underwater acoustic communication channel characteristics into account,the combination of mixed excited linear prediction(MELP) and low density parity check(LDPC) were studied and a multi-carrier underwater acoustic real-time voice communication prototype based on ARM+DSP was designed.By the expreimental test in pool,the proposed system showed a good real-time and voice intelligibility performance,and could distinguish the voice of different speakers.更多还原