This engineering brief presents results of the research on reference-processed pair differential signal objective parameters in relationship with subjective listening tests results in digital audio coding domain. Authors encoded set of encoder-stressful test signals using two different digital audio encoders. Various bitrates have been used in order to cover many types of audio coding artifacts. Listening tests were conducted against reference signals. Differential signals were created from reference and processed signals pairs. Set of objective parameters of differential signals have been analyzed in order to find relationship between those signals parameters and listening tests results. Conclusion was made based on found dependencies.
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