电话按键音的识别

)]),ylabel('energy');,xlabel('帧数');line([1,N],[yuzhi1,yuzhi1],'color','yellow','LineWidth',2);%由语音能量line([1,N],[yuzhi2,yuzhi2],'color','red','LineWidth',2);%由噪声平均能量和语音能量比较而得fork=1:length(st)line([st(k),st(k)],[min(amp),max(amp)],'linestyle',':','color','blue','LineWidth',2);line([en(k),en(k)],[min(amp),max(amp)],'linestyle',':','color','red','LineWidth',2);endsubplot(3,1,3),plot(zcr);%原始语音过零率axis([1,length(zcr),0,max(zcr)]),ylabel('zcr');xlabel('帧数');line([1,N],[zcr_yu1,zcr_yu1],'color','yellow','LineWidth',2);%由语音能量line([1,N],[zcr_yu2,zcr_yu2],'color','red','LineWidth',2);%语音加噪音fork=1:length(st)line([st(k),st(k)],[min(zcr),max(zcr)],'linestyle',':','color','blue','LineWidth',2);line([en(k),en(k)],[min(zcr),max(zcr)],'linestyle',':','color','red','LineWidth',2);endfan_wei=[st,en]*frameinc;