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Real‐time quality assessment for voice over IP
Author(s) -
Yang Fuzheng,
Jiang Liangliang,
Li Xiao
Publication year - 2011
Publication title -
concurrency and computation: practice and experience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 67
eISSN - 1532-0634
pISSN - 1532-0626
DOI - 10.1002/cpe.1907
Subject(s) - computer science , frame (networking) , network packet , packet loss , pooling , real time computing , the internet , computer network , internet protocol , coding (social sciences) , application layer , quality (philosophy) , artificial intelligence , philosophy , statistics , mathematics , epistemology , world wide web , software deployment , operating system
SUMMARY A nonintrusive packet layer model is proposed for quality assessment of Voice over Internet Protocol. Through a simple analysis on the packet headers of the bit‐stream, the information about the bit‐rate and lost status is obtained for each frame. Then the frame quality is measured in terms of coding distortion, frame loss, and contamination because of error propagation. Given the frame quality, a two‐level temporal pooling scheme is designed to predict the overall speech quality. Experimental results show that the proposed model is very accurate in quality assessment. Moreover, the proposed packet layer model is featured by its low complexity, which makes it very suitable for real‐time quality monitoring for Voice over Internet Protocol services. Copyright © 2011 John Wiley & Sons, Ltd.