missing frequencies in Mel FillterBank

Question

missing frequencies in Mel FillterBank

saddlekiller opened this issue 5 years ago · comments

Hi,

When I tried to extract fbank features I found missing frequencies. So, I checked the filter bank in your code and found this:

I am curious about why remove values in 2nd and 6th rows? Is there any trick or that's a bug actually?

tadangkhoa1999 · Answer 1 · Wed Nov 10 2021 23:35:34 GMT+0800 (China Standard Time)

Hi, i have same problem. Have you fixed it?

James Lyons · Answer 2 · Thu Nov 11 2021 06:21:40 GMT+0800 (China Standard Time)

Hi, i have same problem. Have you fixed it?

This is because of rounding in the mel.filterbank calculation. Increase NFFT to fix it. In any case, it wont affect the accuracy of derived features to any significant degree.