Utjecaj mrežnih performansi na subjektivne i objektivne mjere kvalitete mobilnih višekorisničkih video poziva ostvarenih putem tehnologije WebRTC

master's thesis

• Title (english): The Impact of Network Performance on Subjective and Objective Quality Measurements for Mobile Multi-Party WebRTC Video Calls
• Author: Daniel Dujmović
• Mentor: Lea Skorin-Kapov (mentor)
• Committee member: Lea Skorin-Kapov (predsjednik povjerenstva)
• Committee member: Mirko Sužnjević (član povjerenstva)
• Committee member: Maja Matijašević (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2021-07-09, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

Projekt otvorenog koda WebRTC razvijen je kako bi omogućio audio-video komunikaciju u stvarnom vremenu unutar internetskog preglednika. WebRTC omogućuje povezivanje web preglednika u mrežu ravnopravnih korisnika bez obzira na vrstu uređaja koji se koristi. S WebRTC-om krajnji korisnici ne moraju preuzimati posebnu softversku aplikaciju niti koristiti isti klijent ili dodatak preglednika za izravnu međusobnu komunikaciju
U ovom radu provedeno je ispitivanje utjecaja mrežnih parametara tj. gubitka paketa i položaja pametnih telefona tijekom video poziva na iskustvenu kvalitetu korisnika. Video pozivi su ostvareni putem pametnih telefona između tri sudionika korištenjem tehnologije WebRTC. Ispitivanje se sastojalo od 5 testnih slučaja. Tijekom ispitivanja u dva testna slučaja pametni telefoni su korišteni iz ruke, a u preostala tri slučaja sa stalka.
Jedan testni slučaj u kojem je pametni telefon korišten sa stalka i jedan u kojem je pametni telefon korišten iz ruke imali su dodan gubitak paketa. Ispitivanje je provedeno nad 15 ispitanika. Iz prikupljenih podataka izvedeni su zaključci da gubitak paketa i pozicija pametnog telefona imaju utjecaj na iskustvenu kvalitetu. Također u sklopu ovog rada provedena je anketa o stavovima korisnika o video pozivu uspostavljenom putem pametnog telefona te su rezultati prikazani u radu

Abstract (english)

WebRTC is an open source project that was developed to enable real-time audio-video communication within an Internet browser. WebRTC allows connecting a web browser to a peer-to-peer network, regardless of the type of device being used. With WebRTC, end-users do not have to download a separate software application or use the same client or browser plugins for direct communication with each other.
This thesis describes investigation of the influence of network parameters, i.e., packet loss, and the position of smartphones during video calls on the Quality of Experience. Three-party video calls were established via smartphones using WebRTC technology. The study consisted of 5 test cases. During the examination in 2 test cases, the smartphones were used from the hand, and in the remaining 3 test cases, the smartphones were used while remaining in a fixed position on a smartphone stand. One test case in which the smartphone was used while fixed on a stand and one in which the smartphone was used from the hand had added packet loss. The user study involved 15 participants, organized into five groups of three persons per group. From the collected data, conclusions were drawn that the packet loss and the smartphone position during video calls impact the Quality of Experience. Also as part of this theses, a survey was conducted on the attitudes of users about the video call established via a smartphone, and the results are presented in the thesis.

• Keywords: WebRTC; iskustvena kvaliteta; objektivne metrike; subjektivna mjerenja; komunikacija u stvarnom vremenu; gubitak paketa
• Keywords (english): WebRTC; Quality of Experience; objective metrics; subjective measurements; real-time communication; packet loss
• Language: croatian
• URN:NBN: urn:nbn:hr:168:326012
• Study programme: Title: Computing; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka računarstva (magistar/magistra inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-13 09:57:18