FilterSymphony: Realtime Digital Filter Designer

The Realtime Digital Filter Designer is an interactive desktop application that allows users to design and apply digital filters in real time. By placing and modifying zeros and poles on the z-plane, users can dynamically adjust the filter response and observe its effects on real-time signals.

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Features

1. Interactive Z-Plane Editor

• Zero-Pole Placement:
  • Click to add zeros and poles on the z-plane.
  • Drag elements to modify their positions dynamically.
  • Option to add complex conjugates automatically.
• Editing Controls:
  • Delete selected zeros or poles.
  • Clear all zeros, poles, or reset entirely.
  • Undo and Redo:
    • Step back or forward through filter design changes.

2. Frequency Response Visualization

• Magnitude and Phase Response Graphs:
  • Real-time updates based on placed elements.
  • Interactive visualization to analyze filter behavior.

3. Real-Time Signal Filtering

• Apply Designed Filter:
  • Process signals with at least 10,000 points in real-time.
  • Dynamic display of input and filtered signal progression.
• Adjustable Filtering Speed:
  • Control processing speed with a slider (e.g., 1 to 100 points per second).

4. Real-Time Signal Input

• Mouse-Generated Signals:
  • Generate real-time input signals using mouse movement.
  • Faster motion creates higher frequencies; slower motion generates lower frequencies.

5. Phase Correction with All-Pass Filters

• All-Pass Filter Library:
  • Select from a predefined set of all-pass filters.
  • Visualize their zero-pole placement and phase response.
• Custom All-Pass Filter Design:
  • Define arbitrary coefficients and integrate them into the design.
• Enable/Disable All-Pass Elements:
  • Toggle specific all-pass filters via a dropdown menu or checkboxes.

6. Filter Realization and Code Generation

• Filter Realization:
  • Generate filter coefficients based on the designed zero-pole configuration.
  • Implement different realization structures (e.g., Direct Form I, Direct Form II, Transposed, Lattice).
• C Code Generation:
  • Automatically generate C code for embedded system implementation.
  • Export filter coefficients and structures in a hardware-compatible format.

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Preview:

Interactive Z-Plane Editing

• Real-time Zero-Pole Placement:

Phase Correction and Allpass filter library

• Magnitude & Phase Response:

Real-Time Signal Processing

• Live Input & Filtering:

FIlter Realization

• Filter realization using Direct form 1 , Direct form 2 and Cascade form:

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Getting Started

Setup Instructions

Clone the Repository

git clone https://github.com/yourusername/Digital-Filter-Designer.git

Navigate to the Project Directory

cd Digital-Filter-Designer

Install Required Packages

pip install -r requirements.txt

Run the Application

python main.py

Basic Usage

1. Design a Filter:
   • Place zeros and poles on the z-plane.
   • Adjust their positions to modify the filter response.
2. Analyze the Frequency Response:
   • Observe magnitude and phase characteristics.
3. Apply the Filter:
   • Process a large dataset or generate a real-time signal.
4. Enable Phase Correction:
   • Select and apply all-pass filters.

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Dependencies

The Realtime Digital Filter Designer relies on the following technologies and libraries:

Dependency	Description
Python 3.x	Core programming language.
NumPy	Numerical computations for signal processing.
SciPy	Advanced scientific computing and interpolation.
PyQt5	GUI framework for building desktop applications.
PyQtGraph	Fast plotting and interactive 2D/3D visualization.
Matplotlib	Visualization library for plotting response graphs.

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Contributors

Kareem Abdel Nabi

Ahmed AlDeeb

Youssef Abo El-Ela

Mostafa Ali

Thank you for using the Realtime Digital Filter Designer! Feel free to contribute or provide feedback to help us improve.