www.gusucode.com > GUI界面实现语音增强matlab源码程序 > speech enhancement/snr_count.m
function SNR=snr_count(sig,sample) %该函数完成信噪比的计算, sig为输入含有噪声的语音信号; %用信号的前15帧来估计噪声功率,通过总功率减去噪声功率来估计噪声; n=length(sig) noise_power=0; sig_power=0; for i=1:n, temp=(abs(sig(i)))^2; sig_power=temp+sig_power; end; %sig_power sig_power=sig_power/n for j=1:50*sample, temp1=(abs(sig(i)))^2; noise_power=temp1+noise_power; end; %noise_power noise_power=noise_power/(50*sample) SNR=10*log10(sig_power/noise_power);