Monitoring of Speech Quality in Full-Mesh Networks
The quality of speech in network environment is a growing concern of all the companies and institutions, that migrated or are planning to migrate their voice communications to IP based technologies. This trend together with the increasing amount of Internet traffic in general poses a great challenge for network administration to be able to configure and manage the network so it can carry the multimedia traffic without the excessive delays, which degrade the quality of speech as it is perceived by the end users. Continuous monitoring of key nodes of internal infrastructure as well as external interconnections is the possible way to increase the quality of multimedia transmissions for most users, because it allows the network administrators to be informed as soon as the problem rises and consequently to change the network routing and queuing policies to bypass the connection experiencing the quality issues. The tool for this type of monitoring and its architecture are described in detail in this paper.
Keywordsnetwork administration network policing PESQ speech quality monitoring
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- 1.ITU-T P.800 – Recommendation P.800 of the International Telecommunication Union: Methods for subjective determination of transmission quality. ITU-T (1996)Google Scholar
- 2.ITU-T P.800.1 - Recommendation P.800.1 of the International Telecommunication Union: Mean Opinion Score (MOS) terminology. ITU-T (July 2006)Google Scholar
- 3.ITU-T P.862 – Recommendation P.862 of the International Telecommunication Union: Perceptual evaluation of speech quality (PESQ) - An objective Method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs. ITU-T (February 2001)Google Scholar
- 4.ITU-T G.107 - Recommendation G.107 of the International Telecommunication Union: The E-model: A computational model for use in transmission planning, Geneva (2009)Google Scholar
- 5.Voznak, M., Tomes, M., Vaclavikova, Z., Halas, M.: E-model Improvement for Speech Quality Evaluation Including Codecs Tandeming. In: Advances in Data Networks, pp. 119–124. Communications, Computers, Faro (2010)Google Scholar
- 6.Conway, A.E.: A Passive Method for Monitoring Voice-over-IP Call Quality with ITU-T Objective Speech Quality Measurement Methods. In: IEEE Conference on Communications, pp. 2583–2586. ICC (2002)Google Scholar
- 7.Kovac, A., Halas, M.: E-model MOS estimate precision improvement and modelling of jitter effects. Advances in Electrical and Electronic Engineering 10, 276–281 (2012)Google Scholar
- 8.Fu, Q., Yi, K., Sun, M.: Speech quality objective assessment using neural network. In: 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 1511–1514. IEEE, Piscataway (2000)Google Scholar