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Numerical modeling of transmission errors and video quality of MPEG-2
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (MUCOM)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (MUCOM)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (MUCOM)
2001 (English)In: Signal processing. Image communication, ISSN 0923-5965, E-ISSN 1879-2677, Vol. 16, no 8, 817-825 p.Article in journal (Refereed) Published
Abstract [en]

To efficiently combat the signal loss of MPEG-2 transmission over unreliable networks, priority encoding transmission, unequal packet loss protection and priority dropping techniques have been studied in many papers. Those studies are based on the qualitative analysis of different importance of signals, without quantitative investigation of signal loss effect on video quality. In this paper, MPEG-2 packet loss effect on video quality is quantitatively investigated, a temporal layered signal model is described and evaluated, a quality measure for reconstructed pictures called macroblock impairment ratio is suggested and defined. The investigation and the model are specified for MPEG-2, but the principles and the methods are suitable for any layered video. These are useful for the development of efficient schemes and protocols for packet video transmission over unreliable networks.

Place, publisher, year, edition, pages
2001. Vol. 16, no 8, 817-825 p.
Keyword [en]
MPEG-2 packet loss video quality
National Category
Computer Science
Identifiers
URN: urn:nbn:se:miun:diva-407DOI: 10.1016/S0923-5965(01)00009-1ISI: 000168912500010Scopus ID: 2-s2.0-0035339334Local ID: 720OAI: oai:DiVA.org:miun-407DiVA: diva2:2033
Available from: 2008-12-04 Created: 2008-12-04 Last updated: 2016-10-13Bibliographically approved
In thesis
1. Bandwidth Efficient IPTV Distribution: On Error Resilience and Fast Channel Change
Open this publication in new window or tab >>Bandwidth Efficient IPTV Distribution: On Error Resilience and Fast Channel Change
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Television is now changing its traditional distribution forms to being distributed digitally over broadband networks. The recent development of broadband Internet connectivity has made the transition to Internet Protocol Television (IPTV) possible. When changing distribution technique of an existing service, it is important that the new technique does not make the service worse from the user’s point of view. Although a broadband network offers high capacity and has excellent performance there will be occasional packet losses and delays which could negatively influence the user experience of the delivered broadband service. Since bandwidth is a key constraint for video distribution there is a strong incentive for finding schemes to increase bandwidth utilization, especially when distributing high bandwidth IPTV services. In digital video coding it is common to use predictive coding to remove temporal redundancy in video sequences. This technique greatly increases the coding efficiency but makes the sequence more sensitive to information loss or delay. In addition, the use of predictive coding also introduce a inter frame dependency which could make the channel change significantly slower.

This thesis addresses two important areas related to bandwidth efficient IPTV distribution, namely error resilience and fast channel change. A method to numerically estimate the decoded objective video quality of scalable coded video is presented and evaluated. The method can be used to estimate objective video quality for a scalable video transmission system subject to packet-loss. The quality gain of temporally scalable video in a priority packet dropping environment is also investigated and quantified. Synchronization Frames for Channel Switching (SFCS) is proposed as a method to code and distribute video with IP-multicast, which can be used to efficiently combat packet-loss, increase bandwidth utilization, and offer a channel change speed up. The performance of SFCS is analyzed and bandwidth estimation expressions are formulated, analytical results are complemented with computer simulations. The results show that SFCS deployed in an IPTV delivery system can significantly lower the bandwidth consumption and speed up the channel change.

Place, publisher, year, edition, pages
Sundsvall: Mid Sweden Univ, 2007
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 39
Keyword
IPTV distribution
National Category
Information Science
Identifiers
urn:nbn:se:miun:diva-52 (URN)978-91-85317-77-6 (ISBN)
Public defence
2008-01-17, Campus Sundsvall L111, 13:15 (English)
Opponent
Supervisors
Available from: 2007-12-21 Created: 2007-12-21 Last updated: 2010-06-08Bibliographically approved

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Citation style
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