Study of the relationship between subjective conversational quality, and talking, listening and interaction qualities: towards an objective model of the conversational quality

This paper relates a subjective test designed to study the relationship between conversational quality and talking, listening and interaction qualities when facing delay and echo. The results show that subjects were not as much disturbed by echo-free delay, and that the relationship between listening, talking and conversational qualities depends on several factors, like the type of the considered impairments, for instance. A relationship based on linear combination has been determined. A comparison has been made between the estimated conversational quality scores and the subjective conversational quality scores, which showed these are very close.