HE-AAC Decoding Algorithm Implementation

This document provides a complete MATLAB implementation of the HE-AAC (High-Efficiency Advanced Audio Coding) decoding algorithm along with various test files. The codebase includes core decoding functions such as spectral band replication (SBR) processing, parametric stereo decoding, and frequency domain reconstruction algorithms. You can utilize these resources to run comprehensive tests and validate the decoder's performance under different audio configurations. The implementation follows the ISO/IEC 14496-3 standard and includes key modules for: - Bitstream parsing and syntax element extraction - Spectral coefficient decoding using arithmetic coding - SBR synthesis for high-frequency reconstruction - QMF (Quadrature Mirror Filter) bank implementation for subband processing I provide detailed documentation and guidance to help you understand and apply this decoding algorithm effectively. Whether you're a beginner exploring audio codecs or a professional developer working on audio processing applications, this resource offers valuable information and practical tools to deepen your understanding of HE-AAC decoding techniques. The test suite includes sample bitstreams, reference outputs, and validation scripts to ensure correct implementation. The code is structured with modular design principles, allowing easy integration into larger audio processing frameworks. Each major function includes performance optimization considerations and error handling mechanisms for robust operation.