Quality Evaluation of Speech AAC and HE-AAC Coding

The article presents the scores of quality assessment of speech signals transmitted via DAB+ system. The subjective research was provided with the use of ACR procedure, according to the International Telecommunication Union recommendation, and the results have been presented as the MOS values for various bit rates. The comparative analysis of the subjective assessment for speech encoded with AAC and HE-AAC techniques were presented. The subjective tests were carried out for the testing material prepared for Polish speech.