https://community.intel.com/t5/Intel-Integrated-Performance/DCT-lifting-Why-How/m-p/880301#M10117 I am working on an application to extract MFCC features<BR /><BR />Having in mind ippsDCTLifterInitAlloc_Mul_16s(IppsDCTLifterState_16s** pDCTLifter, int lenDCT, const Ipp32f* pLifter, int lenCeps)<BR /><BR />there are two somewhat similar variables 'lenDCT' and 'lenCeps', the latter stamds for the amount of features being extracted, I guess that there might be cases where lenDCT is larger then lenCeps (otherwise there would have been only a single arg and not two ), on the aurora samplenumDCT is set to 23, why does more DCT coefficients then desierered features are needed? I guess the answer is mathematical in nature.<BR /><BR />Any help would be appreciated. Sun, 15 Mar 2009 11:55:45 GMT nadavvolicon_com 2009-03-15T11:55:45Z https://community.intel.com/t5/Intel-Integrated-Performance/DCT-lifting-Why-How/m-p/880301#M10117 I am working on an application to extract MFCC features<BR /><BR />Having in mind ippsDCTLifterInitAlloc_Mul_16s(IppsDCTLifterState_16s** pDCTLifter, int lenDCT, const Ipp32f* pLifter, int lenCeps)<BR /><BR />there are two somewhat similar variables 'lenDCT' and 'lenCeps', the latter stamds for the amount of features being extracted, I guess that there might be cases where lenDCT is larger then lenCeps (otherwise there would have been only a single arg and not two ), on the aurora samplenumDCT is set to 23, why does more DCT coefficients then desierered features are needed? I guess the answer is mathematical in nature.<BR /><BR />Any help would be appreciated. Sun, 15 Mar 2009 11:55:45 GMT https://community.intel.com/t5/Intel-Integrated-Performance/DCT-lifting-Why-How/m-p/880301#M10117 nadavvolicon_com 2009-03-15T11:55:45Z