P2P3 AMD Vivado Cascaded Integrator Comb (CIC) Compiler. PDM Microphone to PCM Decimation

RE: P2P3 AMD Vivado Cascaded Integrator Comb (CIC) Compiler. PDM Microphone to PCM Decimation

navadeepganeshu — Mon, 10 Jul 2023 11:45:54 GMT

That's a very interesting exploration with the onboard microphone. Would it be possible to read the data directly through the GPIO only using PS?

RE: P2P3 AMD Vivado Cascaded Integrator Comb (CIC) Compiler. PDM Microphone to PCM Decimation

michaelkellett — Mon, 10 Jul 2023 11:04:38 GMT

Good and useful blog (as usual !).

Are the CIC filter and the audio IP free from AMD or a time limited trial license ?

Thanks.

RE: P2P3 AMD Vivado Cascaded Integrator Comb (CIC) Compiler. PDM Microphone to PCM Decimation

dougw — Sun, 09 Jul 2023 19:04:38 GMT

Nice job explaining PDM.

RE: P2P3 AMD Vivado Cascaded Integrator Comb (CIC) Compiler. PDM Microphone to PCM Decimation

genebren — Sun, 09 Jul 2023 16:37:42 GMT

Very cool. I designed some boards for a client using a similar microphone. Fortunately for me, I only did the hardware and the client did the software, but it still looks like an area I should investigate more in the near future. Currently I an working on a microphone based system (solely in the analog realm) where I need to amplify a microphone and extract and sample the envelope to determine relative speech patterns, then delay the audio track a bit to allow the extracted speech pattern to be processed and to remain in sync with the speech. Future developments might include other filter/processing on the speech to do some level of voice changing. As I look at your work, it seems that there would be huge possibilities of creating effect digitally. Nice work and thanks for sharing!