Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Performance Study of Objective Speech Quality Measurement for Modern Wireless-VoIP | Hindawi Publishing Corporation EURASIP Journal on Audio Speech and Music Processing Volume 2009 Article ID 104382 11 pages doi 2009 104382 Research Article Performance Study of Objective Speech Quality Measurement for Modern Wireless-VoIP Communications Tiago H. Falk1 and Wai-Yip Chan2 1 Bloorview Research Institute University of Toronto Toronto ON Canada M5S 1A1 2 Department of Electrical and Computer Engineering Queen s University Kingston ON Canada K7L 3N6 Correspondence should be addressed to Tiago H. Falk Received 7 April 2009 Revised 10 June 2009 Accepted 8 July 2009 Recommended by James Kates Wireless-VoIP communications introduce perceptual degradations that are not present with traditional VoIP communications. This paper investigates the effects of such degradations on the performance of three state-of-the-art standard objective quality measurement algorithms PESQ and an extended E-model. The comparative study suggests that measurement performance is significantly affected by acoustic background noise type and level as well as speech codec and packet loss concealment strategy. On our data PESQ attains superior overall performance and and E-model attain comparable performance figures. Copyright 2009 T. H. Falk and . Chan. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction Due to the best-effort nature of current Internet Protocol IP connections real-time speech quality monitoring is needed in order to maintain acceptable quality of service for voice over IP VoIP communications 1 . Traditionally subjective quality assessment tests such as the mean opinion score MOS test 2 3 are used to quantify perceived speech quality. Subjective tests however are expensive and time-consuming and for the purpose of real-time quality monitoring have been .
