Objective measures of the quality of speech transmission in real mobile network – measuring, estimate, and prediction method

摘要

Contemporary means of communication (e.g. mobile telephony) have brought new limitations that telecomoperators have to take into consideration. One of them is the fact that types of the deterioration of speech quality,perceived in mobile telephony, are different from the degradations noted in fixed telephony. During the processof estimating the quality of speech transmission, in this paper are used the comparative (objective) methods for aformed database of degradations of a real mobile communications system. The consideration of the results of theobjective-method tests is based on the development of a new objective method of speech quality. The resultsgathered during the comparison tests have been displayed and interpreted for different types of Serbian vowels:front vowels, /e/; mid vowel, /a/; and back vowels, /u/.