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Trade-offs in bit-rate allocation for wireless video streaming
KTH, School of Electrical Engineering (EES), Communication Networks.
KTH, School of Electrical Engineering (EES), Communication Networks.ORCID iD: 0000-0002-3704-1338
2006 (English)In: ACM MSWiM 2005: Proceedings of the Eighth ACM Symposium on Modeling, Analysis and Simulation of Wireless and Mobile Systems, 2006, Vol. 2006, 349-353 p.Conference paper, Published paper (Refereed)
Abstract [en]

One of the central problems in video transmission over lossy channels is the choice of source and channel coding rates to allocate the available transmission rate optimally. In this paper, we present a structural distortion model for video streaming over time-varying fading channels. Based on this model we study the average video distortion for various bit-rate allocation strategies and channel conditions. We argue that sensitivity to channel variations should be one of the selection criteria when choosing an optimal bit-rate allocation. We demonstrate that a simple bitrate allocation strategy, which aims to minimize current distortion, is not necessarily optimal in terms of time-average distortion. System robustness is crucial for the streaming performance when frequent allocation updates are not feasible. It is achieved at the expense of higher source distortion in the encoder.

Place, publisher, year, edition, pages
2006. Vol. 2006, 349-353 p.
Keyword [en]
Bit-rate allocation, Perceptual distortion, Video streaming, Carrier communication, Channel capacity, Image coding, Mobile computing, Rayleigh fading, Robustness (control systems), Time varying systems, Video signal processing, Bit error rate
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-26612Scopus ID: 2-s2.0-33748967928ISBN: 1-59593-188-0 (print)OAI: oai:DiVA.org:kth-26612DiVA: diva2:372621
Note
QC 20101126Available from: 2010-11-26 Created: 2010-11-26 Last updated: 2013-09-09Bibliographically approved
In thesis
1. Bit-Rate Allocation, Scheduling, and Statistical Multiplexing for Wireless Video Streaming
Open this publication in new window or tab >>Bit-Rate Allocation, Scheduling, and Statistical Multiplexing for Wireless Video Streaming
2008 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

Due to the scarcity of wireless resources, efficient resource allocation is essential to the success of cellular systems. With the proliferation of bandwidth-hungry multimedia applications with diverse traffic characteristics and quality of service requirements, the resource management is becoming particularly challenging. In this thesis, we address some of the key link-layer resource allocation mechanisms that affect the performance of video streaming in cellular systems: bit-rate allocation, opportunistic scheduling, and statistical multiplexing. The bit-rate allocation problem involves the distortion-optimal assignment of source, channel, and pilot data rates under link capacity constraints. We derive an analytical model that captures the video distortion as a function of these data rates and, based on it, we study various bit-rate allocation strategies. The opportunistic scheduling problem addresses the throughput-optimal assignment of time-slots among users with diverse channel conditions under certain fairness constraints. We focus on two aspects of the opportunistic scheduling: the performance of delay-constrained streaming applications and possible extensions of the opportunistic concepts to multicast scenarios. Finally, the statistical multiplexing is a resource-efficient method for smoothing out the extreme burstiness of video streams. We study possible statistical multiplexing gains of H.264 video streams in the context of E-MBMS architecture.

Place, publisher, year, edition, pages
Stockholm: KTH, 2008. 17 p.
Series
Trita-EE, ISSN 1653-5146 ; 2008:031
Keyword
cellular systems, wireless, resource allocation, scheduling
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-4819 (URN)
Presentation
2008-06-12, Q26, Q, Osquldasvag 6, Stockholm, 14:00 (English)
Opponent
Supervisors
Note
QC 20101126Available from: 2008-06-11 Created: 2008-06-11 Last updated: 2010-11-26Bibliographically approved

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Citation style
  • apa
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Language
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