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/AnalysisBase.hpp@0:5c237fdcba23, 2015-12-09 (annotated)

Committer:
MikamiUitOpen
Date:
Wed Dec 09 05:05:00 2015 +0000
Revision:
0:5c237fdcba23
Child:
3:7c26b701f363
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:5c237fdcba23 1 //-------------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 2 // Base class for spectrum analysis (Header)
MikamiUitOpen 0:5c237fdcba23 3 //
MikamiUitOpen 0:5c237fdcba23 4 // 2015/12/08, Copyright (c) 2015 MIKAMI, Naoki
MikamiUitOpen 0:5c237fdcba23 5 //-------------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 6
MikamiUitOpen 0:5c237fdcba23 7 #ifndef BASE_ANALYZER_HPP
MikamiUitOpen 0:5c237fdcba23 8 #define BASE_ANALYZER_HPP
MikamiUitOpen 0:5c237fdcba23 9
MikamiUitOpen 0:5c237fdcba23 10 #include "fftReal.hpp"
MikamiUitOpen 0:5c237fdcba23 11 #include "Hamming.hpp"
MikamiUitOpen 0:5c237fdcba23 12
MikamiUitOpen 0:5c237fdcba23 13 namespace Mikami
MikamiUitOpen 0:5c237fdcba23 14 {
MikamiUitOpen 0:5c237fdcba23 15 class AnalyzerBase
MikamiUitOpen 0:5c237fdcba23 16 {
MikamiUitOpen 0:5c237fdcba23 17 public:
MikamiUitOpen 0:5c237fdcba23 18 AnalyzerBase(int nData, int nFft);
MikamiUitOpen 0:5c237fdcba23 19 virtual ~AnalyzerBase();
MikamiUitOpen 0:5c237fdcba23 20 void Execute(const float xn[], float db[]);
MikamiUitOpen 0:5c237fdcba23 21
MikamiUitOpen 0:5c237fdcba23 22 protected:
MikamiUitOpen 0:5c237fdcba23 23 const int N_DATA_;
MikamiUitOpen 0:5c237fdcba23 24 const int N_FFT_;
MikamiUitOpen 0:5c237fdcba23 25
MikamiUitOpen 0:5c237fdcba23 26 FftReal fft_;
MikamiUitOpen 0:5c237fdcba23 27
MikamiUitOpen 0:5c237fdcba23 28 float Norm(Complex x)
MikamiUitOpen 0:5c237fdcba23 29 { return x.real()*x.real() + x.imag()*x.imag(); }
MikamiUitOpen 0:5c237fdcba23 30
MikamiUitOpen 0:5c237fdcba23 31 private:
MikamiUitOpen 0:5c237fdcba23 32 float* xData_; // data to be analyzed
MikamiUitOpen 0:5c237fdcba23 33
MikamiUitOpen 0:5c237fdcba23 34 virtual void Analyze(const float xn[], float yn[]) = 0;
MikamiUitOpen 0:5c237fdcba23 35 };
MikamiUitOpen 0:5c237fdcba23 36 }
MikamiUitOpen 0:5c237fdcba23 37 #endif // BASE_ANALYZER_HPP