nrf_dsp_freq_thd_i16()

int16_t nrf_dsp_freq_thd_i16	(	int16_t	p_amplitude_spectrum[],
		uint16_t	num,
		uint16_t	base_freq_index,
		uint16_t	n_harmonics )

#include <include/nrf_edgeai/dsp/spectral/nrf_dsp_freq_thd.h>

Compute Total Harmonic Distortion for provided frequency in fixed-point spectrum.

Parameters

[in]	p_amplitude_spectrum	Pointer to amplitude spectrum vector
[in]	num	Number of bins/samples in amplitude spectrum
[in]	base_freq_index	Frequency index(bin) in amplitude spectrum for which THD will be computed
[in]	n_harmonics	Number of harmonics to compute THD, starting from second one, e.g. n_harmonics = 3 then for THD will be used H_2x, H_3x, H_4x

Returns

int16_t Relative Total Harmonic Distortion