The language recognition uses the Shift Delta Coefficients(SDC) as acoustic features.
Some papers uses only SDC(i.e. 49 for each frame), while some uses
MFCC(c0-c6)+SDC (total of 56 for each frame).
Question is :
1) Are SDC are enough for language modeling(i.e. 49)
2) Are MFCC(c0-c6) + SDC much better, and what about c0 should be energy of frame of simple c0?
Dorota Kamińska
I use both: MFCCs and SDC. However, I recomand you to try also extencional features such as: RASTA PLP, Thomson MFCC and others...
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