VOICE_GUI Interface Implementation of SOLA-Based Pitch Scaling Algorithm
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Resource Overview
This project references "SOLA-Based Pitch Scaling Algorithm by Fan Yuhua (Shanghai Jiao Tong University)" and implements the Synchronized Overlap-Add (SOLA) algorithm using MATLAB. The implementation performs pitch scaling while maintaining constant time duration, featuring modular code structure with key functions for audio analysis, frame overlapping, and cross-correlation-based synchronization. The VOICE_GUI interface provides interactive controls for pitch adjustment parameters and real-time audio processing visualization, making it suitable for beginners learning fundamental speech signal processing techniques.
Detailed Documentation
The technical reference for this work is "SOLA-Based Pitch Scaling Algorithm by Fan Yuhua (Shanghai Jiao Tong University)". Our MATLAB implementation of the SOLA algorithm modifies pitch characteristics while preserving the original speech duration through frame-based processing with overlap-add techniques. The code structure includes essential components: audio input preprocessing, frame segmentation with Hanning windowing, pitch scaling via resampling in the frequency domain, and synchronized recombination using cross-correlation peak detection for optimal overlap positioning. The algorithm maintains audio quality by minimizing phase distortion through strategic overlap-add operations. The accompanying VOICE_GUI interface provides interactive sliders for pitch shift parameters, real-time waveform display, and playback controls, demonstrating practical applications of digital speech processing. This educational implementation features commented code and modular design to facilitate understanding of time-scale modification principles for speech signals.
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