摘要
为了使语音信号更好的在信道中传输,可以经过带通滤波器使信号带宽小于信道带宽。通过TMS320VC5509的McBSP配置语音编解码芯片TLV320AIC23正常工作,并将采集到的语音数据经过一个FIR带通滤波器,滤除通带外的噪声,从而可以得到更好的传输信号。实验结果表明经过带通滤波器后的声音质量有显著的提高。
Using band-pass filter can make the signal bandwidth less than the channel bandwidth, so voice signal will more matching channel. Through TMS320VC5509 McBSP configuration the chip of the voice codec TLV320AIC23, then put the voice data passing through a FIR band-pass filter, filter out noise outside the pass-band, so that signal transmission can be got better. The experimental results show that the sound quality improved significantly after the band-pass filter.
出处
《科学技术与工程》
2009年第21期6399-6403,共5页
Science Technology and Engineering
