Question for filter experts: the Coherent FDM modem uses a conversion filter for 8000 to 7500 sample rate. I was wondering if it can be easily modified for 48000 to 7500 rates?
For example it currently interpolates by 15 (8000 * 15 = 120,000) and then decimates (120,000 / 16 = 7500. Since the filter is basically a 120,000 Hz filter then, my simple brain says maybe I can interpolate by some number to use 48000 or 44100. Although neither of those divide into 120,000 evenly. So, obviously 120,000 has to go and 240,000 divided by 5 is 48000 and 240,000 / 32 = 7500. So I could interpolate by 5 and decimate by 32. Is this reasonable/impracticable? Steve _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
