桂林电子科技大学 机构 电子工程与自动化学院,广西,桂林,541004
纸质出版:2018
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隋昊, 周萍, 沈昊, 杨青. 基于混沌序列的压缩感知语音增强算法[J]. 微电子学与计算机, 2018, 35(1): 96-99, 105.
SUI Hao, ZHOU Ping, SHEN Hao, et al. Compressed Sensing Speech Enhancement Algorithm Based on Chaotic Sequences[J]. 2018, 35(1): 96-99.
利用语音在离散余弦变换域下的稀疏性
提出一种将混沌序列和符号函数相结合的观测矩阵
该观测矩阵具有良好的伪随机性
实现了确定性和随机性的统一.首先将带噪的语音信号在DCT域进行稀疏
然后利用提出的观测矩阵进行观测
以保留大部分语音特性
最后在原有重构算法基础上改进重构算法
以加快重构速度.此算法可以使重构语音信号的可懂度和清晰度得到大幅提升
实现了语音增强.
In this paper
present a kind of observation matrix which combines the chaotic sequence with the sign function
which has good pseudo randomness.Firstly
the noisy speech signal is sparse in the DCT domain
then the observation matrix is used to preserve most of the speech features
finally based on the original reconstruction algorithm
this paper improves the reconstruction algorithm to speed up the reconstruction.The algorithm proposed in this paper makes the intelligibility and clarity of reconstructed speech signal be greatly improved
and the speech enhancement is realized.
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