feature_extraction.c File Reference

Spectral feature extraction functions. More...

#include "feature_extraction.h"

Include dependency graph for feature_extraction.c:

Macros
#define	M_PI   3.14159265358979323846264338327950288
#define	NORM_Q15   (1.0F/32768.0F)

Functions
void	buf_to_float (int16_t *pInSignal, float32_t *pOutSignal, uint32_t len)
	Convert 16-bit PCM into floating point values.
void	buf_to_float_normed (int16_t *pInSignal, float32_t *pOutSignal, uint32_t len)
	Convert 16-bit PCM into normalized floating point values.
void	SpectrogramColumn (SpectrogramTypeDef *S, float32_t *pInSignal, float32_t *pOutCol)
	Power Spectrogram column.
void	SpectrogramColumn_pad (SpectrogramTypeDef *S, float32_t *pInSignal, float32_t *pOutCol)
void	MelSpectrogramColumn (MelSpectrogramTypeDef *S, float32_t *pInSignal, float32_t *pOutCol)
	Mel Spectrogram column.
void	LogMelSpectrogramColumn (LogMelSpectrogramTypeDef *S, float32_t *pInSignal, float32_t *pOutCol)
	Log-Mel Spectrogram column.
void	LogMelSpectrogramColumn_q15_Q8 (LogMelSpectrogramTypeDef *S, int16_t *pInSignal, int8_t *pOutCol, int8_t offset, float32_t inv_scale)
void	MfccColumn (MfccTypeDef *S, float32_t *pInSignal, float32_t *pOutCol)
	Mel-Frequency Cepstral Coefficients (MFCCs) column.

Detailed Description

Spectral feature extraction functions.

Author

MCD Application Team

Attention

Copyright (c) 2023 STMicroelectronics. All rights reserved.

This software is licensed under terms that can be found in the LICENSE file in the root directory of this software component. If no LICENSE file comes with this software, it is provided AS-IS.

Macro Definition Documentation

M_PI

#define M_PI   3.14159265358979323846264338327950288

pi