摘要
在Matlab软件平台上,对录制的语音信号采样,分析时域波形和频谱图。根据给定的指标,分别用窗函数法设计FIR数字滤波器和用双线性变化法设计IIR数字滤波器,并对语音信号进行滤波,去除噪声。通过分析滤波后信号的频谱图,简单而有效地阐述了两种数字滤波器在信号处理中的优势。
The recorded speech is sampled, time domain waveform and spectrum based on Matlab are analyzed. According to the specified index, the FIR digital filter by means of window function and IIR digital filter by means of bilinear variation are designed, and then the speech signal to undo noise is filtered. By analyzing spectrum of speech signal after being fil- tered, advantage of two kinds of digital filter in processing signal is expounded concisely and effectively.
出处
《电声技术》
2013年第9期65-68,76,共5页
Audio Engineering
基金
重庆市政委项目(KJ120533)
