Toward assessing subjective quality of service of conversational mobile multimedia applications delivered over the internet: a methodology study

Some recent publications have proposed methodologies to assess the performance of multimedia services in introducing subjective estimate of the end-to-end quality of various applications. As a general statement, in order to obtain meaningful subjective results, the experiments must be repeatable and the elements of the whole chain of transmission between users must be restricted to a minimum number of objective quality metrics. This paper presents the approach to specifying the minimum quality required by the deaf when using a sign language videotelephony application over the Internet with standard off the shelf equipment.