Timeline for What are the step by step actions taken in order to convert PDM data to PCM data?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 4, 2023 at 18:18 | vote | accept | Vass | ||
| Feb 28, 2023 at 9:31 | comment | added | Marcus Müller | @robertbristow-johnson Vaas, ah that makes more sense! | |
| Feb 28, 2023 at 4:36 | comment | added | robert bristow-johnson | So, would your PCM sample rate be around 96 kHz? and is the PDM bit rate then around 5 MHz? | |
| Feb 27, 2023 at 23:45 | answer | added | Hilmar | timeline score: 2 | |
| Feb 27, 2023 at 22:01 | comment | added | Vass | @robertbristow-johnson, the ratio is around 50 so that around 48KHz is produced | |
| Feb 27, 2023 at 21:42 | comment | added | robert bristow-johnson | Do you know what your upsampling ratio is? It needs to be an integer that is decently large. Also do you know what the bandwidth of the final PCM data is expected to be? It should be somewhat less than Nyquist. | |
| Feb 27, 2023 at 21:40 | comment | added | Vass | @robertbristow-johnson, yes that is correct, between zero and +1 (not -1 to +1) | |
| Feb 27, 2023 at 21:31 | comment | added | robert bristow-johnson | So Vass, can you confirm that the data is inherently uni-polar, not bipolar (which might be from -1 to +1)? | |
| Feb 27, 2023 at 21:30 | comment | added | robert bristow-johnson | @MarcusMüller , i think that the OP means that the value will be between 0 and 1 after LPF. So this PDM maps 0% duty cycle to 0 (instead of -1) and 100% duty cycle to 1. | |
| Feb 27, 2023 at 21:29 | comment | added | Vass | @MarcusMüller, would the value not be between 1 and 0? so that 0.5 maps to ~32,000? | |
| Feb 27, 2023 at 21:08 | comment | added | Marcus Müller | Your 3 makes no sense – after low-pass filtering, the signal can't be binary anymore, and even moreso after decimation. | |
| Feb 27, 2023 at 20:58 | history | asked | Vass | CC BY-SA 4.0 |