DtmfCodeAnalyzer
🎶 Analyze and filter DTMF signals
DtmfCodeAnalyzer is an open-source project designed to analyze and filter DTMF (Dual-Tone Multi-Frequency) signals used in conventional telephony. The project provides functionalities to detect and identify keypresses from audio recordings, as well as remove DTMF tones to isolate voice signals.
🎯 Purpose
- 🎵 DTMF Signal Recognition: Identify the key pressed based on the audio recording of its emitted frequencies.
- 🔇 DTMF Noise Removal: Extract and suppress DTMF tones from an audio sample to reveal underlying speech.
- 📊 Mathematical Approach: Use vector projection in an Euclidean space to determine the closest frequency matches.
📝 Features
| 🏷️ Feature | 🔍 Description |
|---|---|
| 🎛️ DTMF Frequencies | Combination of two distinct tones per key |
| 🎚️ Key Identification | Detects and determines the key pressed |
| 🔊 Noise Filtering | Removes DTMF tones while preserving speech |
| 📉 Mathematical Model | Projects signals into a vector space for analysis |
| 🎤 Audio Processing | Works with recorded audio samples |
| 🖥️ Open-Source | Fully customizable and modifiable |
📐 Signal Processing Approach
| 🎵 Frequency Vector Representation | 🧮 Euclidean Projection | 🎛️ Filtering |
|---|---|---|
 |
 |
 |