不韋 呂 / Mbed 2 deprecated F446_Spectrogram

Realtime sound spectrogram using FFT or linear prediction. Spectrogram is displayed on the display of PC. リアルタイム･スペクトログラム．解析の手法：FFT，線形予測法．スペクトログラムは PC のディスプレー装置に表示される．PC 側のプログラム：F446_Spectrogram.

Dependencies:   Array_Matrix mbed SerialTxRxIntr F446_AD_DA UIT_FFT_Real

MySpectrogram/LinearPrediction.hpp@7:5ba884060d3b, 2019-11-24 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Nov 24 11:14:01 2019 +0000
Revision:
7:5ba884060d3b
Parent:
0:a539141b9dec 
8

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:a539141b9dec 1 //-----------------------------------------------------
MikamiUitOpen 0:a539141b9dec 2 // Class for linear prediction (Header)
MikamiUitOpen 0:a539141b9dec 3 //
MikamiUitOpen 0:a539141b9dec 4 // 2017/02/11, Copyright (c) 2017 MIKAMI, Naoki
MikamiUitOpen 0:a539141b9dec 5 //-----------------------------------------------------
MikamiUitOpen 0:a539141b9dec 6
MikamiUitOpen 0:a539141b9dec 7 #ifndef LINEAR_PREDICTION_HPP
MikamiUitOpen 0:a539141b9dec 8 #define LINEAR_PREDICTION_HPP
MikamiUitOpen 0:a539141b9dec 9
MikamiUitOpen 0:a539141b9dec 10 #include "Array.hpp"
MikamiUitOpen 0:a539141b9dec 11
MikamiUitOpen 0:a539141b9dec 12 namespace Mikami
MikamiUitOpen 0:a539141b9dec 13 {
MikamiUitOpen 0:a539141b9dec 14 class LinearPred
MikamiUitOpen 0:a539141b9dec 15 {
MikamiUitOpen 0:a539141b9dec 16 public:
MikamiUitOpen 0:a539141b9dec 17 LinearPred(int nData, int order);
MikamiUitOpen 0:a539141b9dec 18 ~LinearPred() {}
MikamiUitOpen 0:a539141b9dec 19 bool Execute(const float x[], float a[], float &em);
MikamiUitOpen 0:a539141b9dec 20 private:
MikamiUitOpen 0:a539141b9dec 21 const uint16_t N_DATA_;
MikamiUitOpen 0:a539141b9dec 22
MikamiUitOpen 0:a539141b9dec 23 uint16_t order_;
MikamiUitOpen 0:a539141b9dec 24
MikamiUitOpen 0:a539141b9dec 25 Array<float> r_; // for auto-correlation
MikamiUitOpen 0:a539141b9dec 26 Array<float> k_; // for PARCOR coefficients
MikamiUitOpen 0:a539141b9dec 27 Array<float> am_; // working area
MikamiUitOpen 0:a539141b9dec 28
MikamiUitOpen 0:a539141b9dec 29 void AutoCorr(const float x[]);
MikamiUitOpen 0:a539141b9dec 30 bool Durbin(float a[], float &em);
MikamiUitOpen 0:a539141b9dec 31
MikamiUitOpen 0:a539141b9dec 32 // disallow copy constructor and assignment operator
MikamiUitOpen 0:a539141b9dec 33 LinearPred(const LinearPred& );
MikamiUitOpen 0:a539141b9dec 34 LinearPred& operator=(const LinearPred& );
MikamiUitOpen 0:a539141b9dec 35 };
MikamiUitOpen 0:a539141b9dec 36 }
MikamiUitOpen 0:a539141b9dec 37 #endif // LINEAR_PREDICTION_HPP