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Discrete Cisine Transformation

Posted: Thu Jan 27, 2022 4:26 pm
by estamata
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.

Re: Discrete Cisine Transformation

Posted: Fri Jan 28, 2022 7:55 pm
by savage
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.