MPEG-2 over ATM for video dial tone networks: issues and strategies

Dixit, Sudhir; Skelly, P.

doi:10.1109/65.464966

Cited by 39 publications

(8 citation statements)

References 3 publications

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“…The MPEG semantics assume a constant-delay network between the source and destination and a PLL is used to keep the local decoder clock synchronized to the encoder clock [3,4]. This synchronization is achieved by comparing the Fig.…”

Section: Dejittering In Mpegmentioning

confidence: 99%

“…The MPEG-2 standards defined a transport stream protocol [3,4] to multiplex and transport MPEG-1 and MPEG-2 ESs. This transport stream could be easily extended and used for the transport of MPEG-4 data as well.…”

Section: Transporting Mpeg-4 Using the Mpeg-2 Transport Stream Syntaxmentioning

confidence: 99%

“…The MPEG standards assume a constant network delay when the multimedia information is transported. However, since it is difficult, if not impossible, to maintain a constant network delay, it is the function of the synchronization and dejittering algorithms to re-adjust the timing relationship between multimedia packets from the same or several media streams to assure a synchronized playback of information [3,[8][9][10][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Dejittering in the transport of MPEG-2 and MPEG-4 video

et al. 2000

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When multimedia information is transported over a packet-switched network, the quality of presentation can be degraded due to network delay variation or jitter. This paper presents a dejittering scheme that can be used in the transport of MPEG-4 and MPEG-2 video to absorb any introduced network jitter, thus preserving the presentation quality of transported media streams. The dejittering scheme is based on the statistical approximation of delay variation in the arrival times of video packets carrying encoded clock reference values and a filtering and re-stamping mechanism. In addition, a brief overview of the MPEG-4 system is presented.

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Section: Dejittering In Mpegmentioning

confidence: 99%

Section: Transporting Mpeg-4 Using the Mpeg-2 Transport Stream Syntaxmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dejittering in the transport of MPEG-2 and MPEG-4 video

et al. 2000

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“…The "video servers" responsible for such service provision are currently the subject of much research (Doganata and Tantawi 1994;Gemmell et al 1995;Little and Venkatesh 1994;Vin et al 1995). As an illustration, consider that a single VHS-quality MPEG-2 compressed video stream requires 3 Mbps of network bandwidth Correspondence to: S.A. Barnett and a feature-length film will occupy in excess of 2 GB of storage (Dixit and Skelly 1995). Clearly, when we account for thousands of customers and thousands of movies, a largescale video server will be an expensive part of the network infrastructure.…”

Section: Introductionmentioning

confidence: 99%

Performability of disk-array-based video servers

Barnett¹,

Anido²

1998

Multimedia Systems

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Video services are likely to dominate the traffic in future broadband networks. Most of these services will be provided by large-scale public-access video servers. Research to date has shown that disk arrays are a promising technology for providing the storage and throughput required to serve many independent video streams to a large customer population. Large disk arrays, however, are susceptible to disk failures which can greatly affect their reliability. In this paper, we discuss suitable redundancy mechanisms to increase the reliability of disk arrays and compare the performance of the RAID-3 and RAID-5 redundancy schemes. We use cost and performability analyses to rigorously compare the two schemes over a variety of conditions. Accurate cost models are developed and Markov reward models (with time-dependent reward structures) are developed and used to give insight into the tradeoffs between system cost and revenue earning potential. The paper concludes that for large-scale video servers, coarse-grained striping in a RAID-5 style of disk array is most cost effective.

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“…In particular, the smoothing of video playout has been considered essential to prevent potential playout discontinuity resulting from network delay variation while still achieving satisfactory playout throughput. As opposed to several existing approaches attempting to reduce delay variation from networks [5,10], we tackle the problem from the end system perspective.…”

Section: Introductionmentioning

confidence: 99%

Dynamic video playout smoothing method for multimedia applications

Yuang

Liang

Chen

et al.

Proceedings of ICC/SUPERCOMM '96 - International Conference on Communications

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Multimedia applications including video data require the smoothing of video playout to prevent potential discontinuity. In this paper, we propose a dynamic video playout smoothing method, called the Video Smoother, which dynamically adopts various playout rates in an attempt to compensate for high delay variance of networks. Specifically, if the number of frames in the buffer exceeds a given threshold (TH), the Smoother employs a maximum playout rate. Otherwise, the Smoother uses proportionally reduced rates in an effort to eliminate playout pauses resulting from the emptiness of the playout buffer. To determine THs under various loads, we present an analytic model assuming the Interrupted Poisson Process (IPP) arrival. Based on the analytic results, we establish a paradigm of determining THs and playout rates for achieving different playout qualities under various loads of networks. Finally, to demonstrate the viability of the Video Smoother, we have implemented a prototyping system including a multimedia teleconferencing application and the Video Smoother performing as part of the transport layer. The prototyping results show that the Video Smoother achieves smooth playout incurring only unnoticeable delays.

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MPEG-2 over ATM for video dial tone networks: issues and strategies

Cited by 39 publications

References 3 publications

Dejittering in the transport of MPEG-2 and MPEG-4 video

Dejittering in the transport of MPEG-2 and MPEG-4 video

Performability of disk-array-based video servers

Dynamic video playout smoothing method for multimedia applications

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