不韋 呂
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
Diff: MySpectrogram/LPC_Analyzer.hpp
- Revision:
- 0:a539141b9dec
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/MySpectrogram/LPC_Analyzer.hpp Fri Feb 17 04:55:10 2017 +0000
@@ -0,0 +1,36 @@
+//---------------------------------------------------------------
+// Class for spectrum analysis using linear prediction (Header)
+//
+// 2017/02/11, Copyright (c) 2017 MIKAMI, Naoki
+//---------------------------------------------------------------
+
+#ifndef LPC_ANALYZER_HPP
+#define LPC_ANALYZER_HPP
+
+#include "AnalyzerBase.hpp"
+#include "LinearPrediction.hpp"
+
+namespace Mikami
+{
+ class LpcAnalyzer : public AnalyzerBase
+ {
+ public:
+ LpcAnalyzer(int nData, int nFft, int order);
+ virtual ~LpcAnalyzer() {}
+
+ private:
+ int order_;
+ LinearPred lp_;
+
+ Array<float> an_; // predictor coefficient
+ Array<float> xFft_; // input for FFT
+ Array<Complex> yFft_; // output of FFT
+
+ virtual void Analyze(const float xn[], float yn[]);
+
+ // disallow copy constructor and assignment operator
+ LpcAnalyzer(const LpcAnalyzer& );
+ LpcAnalyzer& operator=(const LpcAnalyzer& );
+ };
+}
+#endif // LPC_ANALYZER_HPP