Title | ||
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Bandwidth allocation for the transmission of scalable MPEG video traffic with deterministic guarantees |
Abstract | ||
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This paper studies bandwidth allocation schemes for the transmission of VBR video traffic with deterministic guarantees, i.e. no packets lost and no missed deadlines. Specifically, we propose and investigate a policy namedquasi-constant policy . A VBR encoder attempts to keep the quality of video output constant by varying the transmission rate (constant quality); on the other hand, with a quasi-constant policy the video quality transmission is reduced when congestion occurs. We assume that this reduction is obtained by exploiting source scalability. By characterizing the traffic of a source with a constraint function, we define the relationship between the amount of bandwidth assigned to a VBR source and the maximum delay the application may experience. By applying this relationship to long MPEG 2 traces (more than one hour) we show that the quasi-constant policy is a very promising direction for providing, in an efficient way, a deterministic QoS to VBR video traffic. Specifically, the results presented indicate that with the quasi-constant quality approach we can achieve a utilization greater than 50% with a deadline of one second with only eight reduced-quality frames out of 1000. On the other hand, previous works ([1, 2]) indicate that with a constant quality transmission, a 50% network utilization can be achieved only by tolerating a seven-second deadline. |
Year | DOI | Venue |
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2001 | 10.1006/rtim.2000.0225 | Real-Time Imaging |
Keywords | Field | DocType |
vbr source,quasi-constant quality approach,policy namedquasi-constant policy,vbr encoder attempt,vbr video traffic,constant quality transmission,deterministic guarantee,scalable mpeg video traffic,bandwidth allocation,constant quality,transmission rate,video quality transmission,quasi-constant policy,video quality,rate constant | Data transmission,Computer science,Bandwidth allocation,Network packet,Computer network,Quality of service,Real-time computing,Encoder,Video quality,MPEG-2,Variable bitrate | Journal |
Volume | Issue | ISSN |
7 | 3 | Real-Time Imaging |
Citations | PageRank | References |
4 | 0.40 | 15 |
Authors | ||
2 |
Name | Order | Citations | PageRank |
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Marco Conti | 1 | 1309 | 127.67 |
Gregori, Enrico | 2 | 228 | 25.30 |