NDLI: Optimizing transmission time of scalable coded images in peer-to-peer networks

Content Provider	Springer Nature Link
Author	Su, Xiao Fatoohi, Rod Wang, Tao
Copyright Year	2005
Abstract	In this paper, we study how to optimize image transmission time in peer-to-peer networks by considering the property of bitstreams generated by image coding algorithms. Images can be either scalable coded or nonscalable coded. Since transmission of nonscalable coded images is well understood, we focus on the transmission of scalable coded images in this paper.Because scalable coding embeds lower bit-rate bitstreams into higher bit-rate bitstreams, there exists a many-to-one relationship between supplying and requesting peers. When a requesting peer asks for an image coded in a particular bit rate, multiple peers with the same image but coded in different bit rates can supply to the requesting peer. This enables us to assign the task of image transmission to multiple supplying peers, split the traffic among these peers, and then reduce overall transmission time. Therefore, when we transmit scalable coded images over peer-to-peer networks, it is important to design optimal peer assignment algorithms to minimize the overall transmission time for the requesting peer.In this paper, we first formally define the peer assignment problem and then establish a sufficient condition on the optimality of peer assignment. Based on this condition, we propose an optimal peer assignment algorithm in continuous space (OPA-CS) and then derive a suboptimal peer assignment algorithm in integer space (SOPA-IS). Finally, we carry out extensive experiments to verify the superior performance of the proposed peer assignment algorithms by comparing with two simple heuristic schemes.
Starting Page	413
Ending Page	421
Page Count	9
File Format	PDF
ISSN	09424962
Journal	Multimedia Systems
Volume Number	10
Issue Number	5
e-ISSN	14321882
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-07-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Image transmission Scalable image coding Peer-to-peer networks Peer assignment Computer Communication Networks Operating Systems Data Storage Representation Data Encryption Computer Graphics Image Processing Multimedia Information Systems
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Information Systems Media Technology Hardware and Architecture Software

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