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Tuning of the Objective, Perceptual Based Evaluation Methods of Compressed Speech and Audio Signals

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This document presents almost final view for the research about objective methods, which use psychoacoustics knowledge for estimation of the quality of audio signals. The software written especially for this research is presented. This program allows for implementation of the different published methods for evaluation of the quality of perceptual coded audio signals. Protocols: PAQM, PSQM, NMR, PEAQ, PESQ are implemented up to now. All of these algorithms are used for simulation of the auditory system. The software is open for addition next protocols as the plug-ins. There is a possibility to change and improve earlier published protocols. Authors proposed in earlier works how to improve objective protocols e.g. by changing pitch scale or FFT parameters. Suggested tuning of internal parameters of signal processing, which improves results of objective evaluation, is presented. The criterion of optimization is difference between results of subjective and objective evaluation.

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AES - Audio Engineering Society