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：