Discrete Cisine Transformation

estamata
Posts: 2
Joined: Thu Jan 27, 2022 10:40 am

Discrete Cisine Transformation

Postby estamata » Thu Jan 27, 2022 4:26 pm

Hi,
has anyone implemented in esp32 Discrete Cosine Transformation or Discrete Wavelet Transformation ?
i want to extract the coeffs ftom a 1024 or 2048 bit long of raw data sound signal
thank you for your time
M.

savage
Posts: 15
Joined: Mon Jul 15, 2019 9:24 pm

Re: Discrete Cisine Transformation

Postby savage » Fri Jan 28, 2022 7:55 pm

Take a look at the Espressif DSP library:
https://github.com/espressif/esp-dsp/

I only see complex FFT functions, but you could use those for a DCT.

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