https://community.intel.com/t5/Intel-Integrated-Performance/Suming-the-Results-of-Multiple-FIR-Filters/m-p/884565#M10543 <P>Hello everyone,</P> <P>I would like to create various random broadband signals. To create a broadband signal, I am using random (white) noise as input to an FIR filter. In practice, I will have many FIR filters with different coefficients (and likely different sampling rates, although they can be set to 44.1 kHz, 44.1 / 2 kHz, 44.1 / 4 kHz, ... etc).</P> <P>Because I have so many broadbands, performance is an issue. I would like use IPP's FIR filter functionality to achieve this. However, my research on it indicates that I have to make a function call for each filter separately, and this would write the output samples in an array.</P> <P>In my case, I am not interestedin the individual outputs for each FIR filter. This is because I will be summing all outputs together and make one new signal that contains the sum of all outputs. I am only interested in the sum of all outputs.</P> <P>What I am concerned about is that writing the output each time in a separate output array for each FIR filter causes an overhead. Is there a way to configure the FIR filter so that it "adds" the output to an existing array as opposed to simply overwriting any existing data? This way, I won't have to do a whole new loop for each FIR filter to copy its output samples to an existing array.</P> <P>Please note that each FIR filter has a different input array (i.e. different random noise).</P> <P>Thank you.</P> <P>Greg</P> <P></P> Wed, 21 May 2008 18:18:51 GMT gregz7 2008-05-21T18:18:51Z https://community.intel.com/t5/Intel-Integrated-Performance/Suming-the-Results-of-Multiple-FIR-Filters/m-p/884565#M10543 <P>Hello everyone,</P> <P>I would like to create various random broadband signals. To create a broadband signal, I am using random (white) noise as input to an FIR filter. In practice, I will have many FIR filters with different coefficients (and likely different sampling rates, although they can be set to 44.1 kHz, 44.1 / 2 kHz, 44.1 / 4 kHz, ... etc).</P> <P>Because I have so many broadbands, performance is an issue. I would like use IPP's FIR filter functionality to achieve this. However, my research on it indicates that I have to make a function call for each filter separately, and this would write the output samples in an array.</P> <P>In my case, I am not interestedin the individual outputs for each FIR filter. This is because I will be summing all outputs together and make one new signal that contains the sum of all outputs. I am only interested in the sum of all outputs.</P> <P>What I am concerned about is that writing the output each time in a separate output array for each FIR filter causes an overhead. Is there a way to configure the FIR filter so that it "adds" the output to an existing array as opposed to simply overwriting any existing data? This way, I won't have to do a whole new loop for each FIR filter to copy its output samples to an existing array.</P> <P>Please note that each FIR filter has a different input array (i.e. different random noise).</P> <P>Thank you.</P> <P>Greg</P> <P></P> Wed, 21 May 2008 18:18:51 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Suming-the-Results-of-Multiple-FIR-Filters/m-p/884565#M10543 gregz7 2008-05-21T18:18:51Z https://community.intel.com/t5/Intel-Integrated-Performance/Suming-the-Results-of-Multiple-FIR-Filters/m-p/884566#M10544 <P>Hi Greg,</P> <P>there is comment from our expert</P> <P class="MsoNormal"><SPAN>there is no such way. ippsFIR is a primitive function.<P></P></SPAN></P> <P>Regards,<BR /> Vladimir</P> Tue, 24 Jun 2008 14:05:46 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Suming-the-Results-of-Multiple-FIR-Filters/m-p/884566#M10544 Vladimir_Dudnik 2008-06-24T14:05:46Z