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nsAnalyser: Speech quality testing application for telephone service
KTH, School of Technology and Health (STH), Data- och elektroteknik.
2013 (English)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
nsAnalyser : Talkvalitetstestapplikation för telefonitjänst (Swedish)
Abstract [en]

This degree project was made in collaboration with Nordicstation. The project task was to develop a testing application for a self-developed telephone survey service, which uses third party software. This third party software showed to be unreliable at higher loads. The purpose of the application is to analyse the speech quality of clients connected to the service. This report gives an introduction to the speech quality algorithms Perceptual Evaluation of Speech Quality (PESQ) and Single Sided Speech Quality Measure (3SQM). It also gives descriptions of the methods used to develop the application. The final chapters in this report are about the testing of the telephone service. The primary result of the testing was that the telephone service is unable to acceptably handle 80+ clients and recommendations to Nordicstation is to set a maximum of parallel connected clients to 80 or find an alternative to the third party software currently in use.

Abstract [sv]

Detta examensarbete har gjorts i samarbete med Nordicstation. Projektets uppgift var att utveckla ett test program för at testa en egenutvecklad telefonundersökning-tjänst, baserad på tredjeparts mjukvara. Denna tredjeparts mjukvara visade sig vara opålitlig vid högre belastning. Syftet med programmet är att analysera samtals kvalitéten på de klienter som är anslutna till tjänsten. Denna rapport ger en introduktion till ljudkvalitetsalgoritmer så som Perceptual Evaluation of Speech Quality (PESQ) och Single Sided Speech Quality Measure (3SQM). Rapporten går även igenom de metoder som använts för att utvecklat programmet. De sista kapitlen i denna rapport är om själva testningen av telefonitjänsten. Det primära resultatet av testningen var att telefontjänsten inte kan hantera 80+ klienter acceptabelt och rekommendationer till Nordicstation är att sätta ett tak på maximalt parallellt anslutna klienter till 80 eller hitta ett alternativ till den tredjeparts mjukvara som nu används.

Place, publisher, year, edition, pages
2013. , 32 p.
Series
Trita-STH, 2013:28
Keyword [en]
Speech quality measurement, 3SQM, PESQ, Ozeki, SIPSorcery, phone call simulation
Keyword [sv]
Talkvalitetsanalys, 3SQM, PESQ, Ozeki, SIPSorcery, telefonsamtalssimulation
National Category
Computer Engineering
Identifiers
URN: urn:nbn:se:kth:diva-123594OAI: oai:DiVA.org:kth-123594DiVA: diva2:628109
External cooperation
Nordicstation
Subject / course
Computer Technology, Program- and System Development
Educational program
Bachelor of Science in Engineering - Computer Engineering
Uppsok
Technology
Supervisors
Examiners
Available from: 2013-06-27 Created: 2013-06-13 Last updated: 2013-06-27Bibliographically approved

Open Access in DiVA

nsAnalyser(773 kB)407 downloads
File information
File name FULLTEXT01.pdfFile size 773 kBChecksum SHA-512
fbdfab74747e7114361d8573f3da12426c3947dc223f120b1f26e2065db3fa41b01a1f8fec1a33a41b9c7a64d7a1d1c752ebfeaf3f3050ded8ca4c6bbcdcef35
Type fulltextMimetype application/pdf

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CiteExportLink to record
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Citation style
  • apa
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  • de-DE
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  • nn-NB
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More languages
Output format
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