Implementation Guide for PESQ Objective Speech Quality Measurement

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Resource Overview

The PESQ (Perceptual Evaluation of Speech Quality) metric evaluates speech quality using a MATLAB-compatible function syntax: [pesq_mos] = pesq('cleanfile.wav', 'enhanced.wav'). This function compares reference and processed audio files to generate a MOS-like score on a 1-5 scale (PESQ-MOS), where higher values indicate better perceptual quality. The implementation follows ITU-T P.862 standards for objective speech assessment.

Detailed Documentation

The PESQ (Perceptual Evaluation of Speech Quality) objective measurement operates through the following MATLAB function call: [pesq_mos] = pesq('cleanfile.wav', 'enhanced.wav'). Here, 'cleanfile.wav' serves as the reference signal containing original uncompressed speech, while 'enhanced.wav' represents the processed/denoised audio file for evaluation. The algorithm employs perceptual modeling of human auditory system characteristics, comparing temporal envelopes and loudness spectra between reference and test signals. According to Loizou, P. (2007) in "Speech Enhancement: Theory and Practice" (CRC Press), PESQ demonstrates strong correlation with subjective listening tests and is extensively adopted in speech enhancement research. Technical inquiries may be directed to loizou@utdallas.edu.

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