matlab读取h5文件：
filename='voxforge.h5';
h5disp(filename);
1.python绘制MFCC和Fbank热力图谱
https://blog.csdn.net/m0_37052320/article/details/80743906
https://blog.csdn.net/TH_NUM/article/details/80597495
很好的参考：http://www.cnblogs.com/xingshansi/p/6815217.html
mel.m
mfcc.m
MFCC转换成梅尔声谱
figure;
t=(0:sigLength-1)/fs;
ff=1:length(m(1,:));
%colormap gray;
imagesc(t,[0:fs],m);title('梅尔声谱');xlabel('时间(s)'); ylabel('频率');
axis xy;
figure;
imagesc(t,ff,m);title('梅尔声谱');xlabel('时间(s)'); ylabel('维数');
axis xy;
结果：
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