topic Bug found about ipp multirate Fir filter? in Intel® Integrated Performance Primitives https://community.intel.com/t5/Intel-Integrated-Performance/Bug-found-about-ipp-multirate-Fir-filter/m-p/813462#M4050 Iused the IPP FIR funtions to build a multi-rate filter. And I found the parament "downFactor" is useless.<BR />The length of output is source length multipled with "upFactor". I checked ippsFIR_32f and ippsMRFIRDirect_32f, the bugs is same. Is it realy a bug? Wed, 01 Jun 2011 04:12:09 GMT tan__xiaox 2011-06-01T04:12:09Z Bug found about ipp multirate Fir filter? https://community.intel.com/t5/Intel-Integrated-Performance/Bug-found-about-ipp-multirate-Fir-filter/m-p/813462#M4050 Iused the IPP FIR funtions to build a multi-rate filter. And I found the parament "downFactor" is useless.<BR />The length of output is source length multipled with "upFactor". I checked ippsFIR_32f and ippsMRFIRDirect_32f, the bugs is same. Is it realy a bug? Wed, 01 Jun 2011 04:12:09 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Bug-found-about-ipp-multirate-Fir-filter/m-p/813462#M4050 tan__xiaox 2011-06-01T04:12:09Z Bug found about ipp multirate Fir filter? https://community.intel.com/t5/Intel-Integrated-Performance/Bug-found-about-ipp-multirate-Fir-filter/m-p/813463#M4051 <P>Hi, Souledge.<BR />Which downFactor do you use? If downFactor=1 output will be the same, but for downFactor=2 output will be two times shorter and so on. Look please ippsSampleDown function documentation in Intel Integrated Performance Primitives, Reference Manual, Volume 1, Signal Processing.</P> Thu, 02 Jun 2011 08:28:51 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Bug-found-about-ipp-multirate-Fir-filter/m-p/813463#M4051 Andrey_B_Intel 2011-06-02T08:28:51Z