Timeline for Best way convert transfer function to FIR filter without group delay if i have complex transfer function data
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6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 23, 2022 at 13:41 | vote | accept | gg h | ||
| Feb 23, 2022 at 12:58 | comment | added | gg h | Thank you, please see this post dsp.stackexchange.com/questions/81403/… . for example when i convert Acoustic transfer function to fir filter from above method, M order fir filter have original phase delay (Acoustic transfer function)at each frequency bin and have some linear phase(fftshift, to make causal). linear phase(group delay) have M/2 delay. M/2 delay is not reasonable. Could you tell me how can i reduce M/2 delay? | |
| Feb 23, 2022 at 12:53 | comment | added | gg h | Thank you, please see this post dsp.stackexchange.com/questions/81403/… | |
| Feb 23, 2022 at 10:33 | comment | added | Hilmar | Sorry, I don't understand your question. Acoustic Transfer functions are complex i.e. they have a magnitude and a phase. Whether the phase matters or not depends on your application. For example, if you want to equalize a speaker, you can (mostly) disregard the phase. If you do arraying or noise cancellation you need to match the phase carefully. All causal filters have group delay, but typically it's dependent on frequency. I think what you are talking about as "group delay" is the bulk delay of a linear phase filter. There are plenty of other filter types out there than don't have bulk delay | |
| Feb 23, 2022 at 9:28 | comment | added | gg h | when estimate acoustic transfer function, i know wiener filter has no group delay isn't it true? you mean if i fit both magnitude and phase. M/2 group delay is always?? | |
| Feb 23, 2022 at 8:35 | history | answered | Hilmar | CC BY-SA 4.0 |