Decentralizirano statističko multipleksiranje u mrežama za distribuciju videosadržaja

scientific master's theses

• Title (english): Decentralised Statistical Multiplexing in Videodistribution Networks
• Author: Damir Jurak
• Mentor: Branka Zovko-Cihlar (mentor)
• Committee member: Sonja Grgić (predsjednik povjerenstva)
• Committee member: Branka Zovko-Cihlar (član povjerenstva)
• Committee member: Slavko Šarić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Communication and Space Technologies); Zagreb
• Defense date and country: 2011, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

Na području širokopojasnog pristupa i u kontekstu sve većih zahtjeva na brzinu prijenosa nameće se potreba za maksimiziranjem efikasnosti svih sustava u mrežama za distribuciju sadržaja. Sve veći interes za video i televizijske sadržaje zahtjeva tehnička rješenja koja su inovativna i efikasna. Stoga su danas vrlo tražena tehnička rješenja za distribuciju video sadržaja koja svojom efikasnošću ispunjavaju sve zahtjeve pružatelja usluga. Pružatelji usluga moraju podići razinu kvalitete, pazeći da istovremeno minimiziraju ugrozu funkcioniranja postojeće infrastrukture. IPTV operatori si ne mogu priuštiti da profitabilne usluge ne budu dio njihove ponude u trenutku eksplozije tržišne potražnje za HDTV i HD-VOD ponudom. Stoga se u radu razmatraju načini razdvajanja video kodiranja i multipleksiranja u smislu decentralizacije IPTV sustava, te što veće iskorištenje procesa video kompresije koji će istovremeno omogućiti veću širokopojasnu efikasnost, te povećati video kvalitetu. Kvaliteta za IPTV znači osiguravanje dovoljne raspoloživosti mreže u svrhu smanjenja utjecaja na percepciju video slika do koje dolazi ako se ne osigura prihvatljivi gubitak paketa s kraja na kraj prijenosne veze. U radu se razmatra i kako smanjiti posljedice kašnjenja koje doživljava korisnik. Kao ideja vodilja razrađen je princip i primjena statističkog multipleksiranja, algoritmi njegovog funkcioniranja, te učinci na efikasno korištenje ograničavajućih prijenosnih putova.

Abstract (english)

In the filed of broadband access and in the context of larger transmission speed requests, there is a need to maximise efficiency of all systems of videodistribution networks. Increasing interest for video and television content imposing inovative and efficient technical solutions. Therefore, today technical solutions for videodistribution networks should fulfill all requests of service providers. Service providers must increase service quality level, with procossion to prevent threats for functionality of existing infrastructure and equipment. IPTV providers can not afford to themselves skiping of today highly profitable services, especially in time of market explosion demand for HDTV and HD-VOD services. In this work, methods of spliting video coding and multiplexing are considered with main goal for decentralisation of IPTV system. Also, there is a need for maximisation of video coding proces in order to have higher broadband efficiency and higher video quality. IPTV quality means assurance of adequate network availibility in purpose of reducing negative percpetion impact to video quality, and which is in fact consequence of end-to-end packet loss. In work, there are also methods considered to mitigate negative effects of delays for end user. As leading idea iplementation of statistical multiplexing process is considered, including with functional algorytms and with positive impact for efficient uage of restrictive transmission paths.

• Keywords: statistički multiplekser; medianet; otvorena petlja; zatvorena petlja; decentralizirano; IPTV; VBR; CBR; MPEG-2; H.264 AVC/MPEG-4
• Keywords (english): statistical multiplexer; medianet; open loop; closed loop; decentralised; IPTV; VBR; CBR; MPEG-2; H.264 AVC/MPEG-4
• Language: croatian
• URN:NBN: urn:nbn:hr:168:287668
• Study programme: Title: Postgraduate master programme in electrical engineering; Study programme type: university; Study level: postgraduate; Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
• Catalog URL: http://lib.fer.hr/cgi-bin/koha/opac-detail.pl?biblionumber=37290
• Type of resource: Text
• Extent: 110 str ; 30 cm
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-09-03 11:34:07