不韋 呂 / Mbed 2 deprecated F746_RealtimeSpectrumAnalyzer

Realtime spectrum analyzer. Using FFT, linear prediction, or cepstrum smoothing. Version using MEMS microphone and CODEC, named "F746_RealtimeSpectrumAnalyzer_MEMS_Mic" is registered. リアルタイム スペクトル解析器．解析の手法：FFT，線形予測法，ケプストラムによる平滑化の３種類．このプログラムの説明は，CQ出版社のインターフェース誌，2016年4月号に掲載．外付けのマイクまたは他の信号源等を A0 に接続する．線形予測法，ケプストラムは，スペクトル解析の対象を音声信号に想定してパラメータを設定している．MEMS マイクと CODEC を使ったバージョンを "F746_RealtimeSpectrumAnalyzer_MEMS_Mic" として登録．

Dependencies:   BSP_DISCO_F746NG BUTTON_GROUP LCD_DISCO_F746NG TS_DISCO_F746NG UIT_FFT_Real mbed

MyClasses/LinearPrediction.hpp@18:6630d61aeb3c, 2016-02-22 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Feb 22 13:54:51 2016 +0000
Revision:
18:6630d61aeb3c
Parent:
5:98ec9dd54144 
19

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:5c237fdcba23 1 //-----------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 2 // Class for linear prediction (Header)
MikamiUitOpen 0:5c237fdcba23 3 //
MikamiUitOpen 4:99d4d5ea06a2 4 // 2015/12/15, Copyright (c) 2015 MIKAMI, Naoki
MikamiUitOpen 0:5c237fdcba23 5 //-----------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 6
MikamiUitOpen 0:5c237fdcba23 7 #ifndef LINEAR_PREDICTION_HPP
MikamiUitOpen 0:5c237fdcba23 8 #define LINEAR_PREDICTION_HPP
MikamiUitOpen 0:5c237fdcba23 9
MikamiUitOpen 0:5c237fdcba23 10 #include "mbed.h"
MikamiUitOpen 0:5c237fdcba23 11
MikamiUitOpen 0:5c237fdcba23 12 namespace Mikami
MikamiUitOpen 0:5c237fdcba23 13 {
MikamiUitOpen 0:5c237fdcba23 14 class LinearPred
MikamiUitOpen 0:5c237fdcba23 15 {
MikamiUitOpen 0:5c237fdcba23 16 public:
MikamiUitOpen 0:5c237fdcba23 17 LinearPred(int nData, int order);
MikamiUitOpen 0:5c237fdcba23 18 ~LinearPred();
MikamiUitOpen 0:5c237fdcba23 19 bool Execute(const float x[], float a[], float &em);
MikamiUitOpen 4:99d4d5ea06a2 20 private:
MikamiUitOpen 0:5c237fdcba23 21 const uint16_t N_DATA_;
MikamiUitOpen 0:5c237fdcba23 22 const uint16_t ORDER_;
MikamiUitOpen 0:5c237fdcba23 23
MikamiUitOpen 0:5c237fdcba23 24 float* r_; // for auto-correlation
MikamiUitOpen 0:5c237fdcba23 25 float* k_; // for PARCOR coefficients
MikamiUitOpen 0:5c237fdcba23 26 float* am_; // working area
MikamiUitOpen 0:5c237fdcba23 27
MikamiUitOpen 0:5c237fdcba23 28 void AutoCorr(const float x[]);
MikamiUitOpen 0:5c237fdcba23 29 bool Durbin(float a[], float &em);
MikamiUitOpen 4:99d4d5ea06a2 30
MikamiUitOpen 4:99d4d5ea06a2 31 // disallow copy constructor and assignment operator
MikamiUitOpen 4:99d4d5ea06a2 32 LinearPred(const LinearPred& );
MikamiUitOpen 4:99d4d5ea06a2 33 LinearPred& operator=(const LinearPred& );
MikamiUitOpen 0:5c237fdcba23 34 };
MikamiUitOpen 0:5c237fdcba23 35 }
MikamiUitOpen 0:5c237fdcba23 36 #endif // LINEAR_PREDICTION_HPP