MATLAB Simulation of Arithmetic Coding

This is a comprehensive MATLAB simulation program for arithmetic coding that facilitates step-by-step simulation and analysis of the encoding process. The implementation includes critical stages such as input data preprocessing, probability calculation, encoding procedures, and decoding operations. The simulation results provide deep insights into the principles and performance of arithmetic coding, making it suitable for both educational and research applications. The program employs a probability-based encoding algorithm that maps input data to an appropriate interval range. Through iterative interval scaling and updates based on symbol probabilities, the algorithm generates an encoded bitstream. Key functions include probability distribution calculation using frequency analysis, interval subdivision through cumulative probability multiplication, and bitstream generation via precision management. The decoding process reverses these operations by reconstructing the original data from the compressed bitstream using the same probability model. This simulation serves as a valuable tool for understanding arithmetic coding mechanisms, featuring practical code implementations that demonstrate interval manipulation techniques, binary fraction handling, and error-free reconstruction. The modular design allows users to examine individual components like context modeling, range normalization, and termination handling while observing how algorithmic parameters affect compression efficiency.