Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : A study of artificial speech quality assessors of VoIP calls subject to limited bursty packet losses | Jelassi and Rubino EURASIP Journal on Image and Video Processing 2011 2011 9 http content 2011 1 9 D EURASIP Journal on Image and Video Processing a SpringerOpen Journal RESEARCH Open Access A study of artificial speech quality assessors of VoIP calls subject to limited bursty packet losses Sofiene Jelassi and Gerardo Rubino Abstract A revolutionary feature of emerging media services over the Internet is their ability to account for human perception during service delivery processes which surely increases their popularity and incomes. In such a situation it is necessary to understand the users perception what should obviously be done using standardized subjective experiences. However it is also important to develop artificial quality assessors that enable to automatically quantify the perceived quality. This efficiently helps performing optimal network and service management at the core and edges of the delivery systems. In our article we explore the behavior rating of new emerging artificial speech quality assessors of VoIP calls subject to moderately bursty packet loss processes. The examined Speech Quality Assessment SQA algorithms are able to estimate speech quality of live VoIP calls at runtime using control information extracted from header content of received packets. They are especially designed to be sensitive to packet loss burstiness. The performance evaluation study is performed using a dedicated set-up software-based SQA framework. It offers a specialized packet killer and includes the implementation of four SQA algorithms. A speech quality database which covers a wide range of bursty packet loss conditions has been created and then thoroughly analyzed. Our main findings are the following 1 all examined automatic bursty-loss aware speech quality assessors achieve a satisfactory correlation under upper 20 and lower 10 ranges of packet loss processes 2 they exhibit a clear weakness to assess speech quality under a moderated .
