Transmission of MPEG-2 video streams over ATM

Gringeri, S.; Khasnabish, Bhumip; Lewis, A.; Shuaib, Khaled; Egorov, Roman; Basch, B.

doi:10.1109/93.664743

Cited by 35 publications

(16 citation statements)

References 11 publications

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“…17 using the Ski" sequence. It is indeed shown that the video quality rst increases with the average bit rate and 9 The number of video frames transmitted per time unit is independent of the encoding bit rate then decreases after around 6 Mbps. This optimal average bit rate directly depends on the content type of the sequence.…”

Section: Joint Impact Analysismentioning

confidence: 93%

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User-oriented QoS in packet video delivery

et al. 1998

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We focus on packet video delivery, with an emphasis on the quality of service perceived by the end-user. A video signal passes through several subsystems, such as the source coder, the network and the decoder. Each of these can impair the information, either by data loss or by i n troducing delay. We describe how each of the subsystems can be tuned to optimize the quality of the delivered signal, for a given available bit rate in the network. The assessment of end-user quality is not trivial.We present recent research results, which rely on a model of the human visual system.

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Section: Joint Impact Analysismentioning

confidence: 93%

“…Therefore, the higher the encoding bit rate, the higher the number of packets transmitted per time unit. Thus, for a given PLR, the higher the encoding bit rate, the higher the number of packets lost per time unit 9 .…”

Section: Joint Impact Analysismentioning

confidence: 99%

User-oriented QoS in packet video delivery

et al. 1998

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“…Kanakia et al dynamically change the video quality level during network congestion [KMR93]. The research by Gringeri et al deal with network data loss on an ATM network by using hierarchical coding and scalable syntax [GKL+98]. Hierarchical coding allows reconstruction of useful video from pieces of the total bit stream.…”

Section: Audio Loss Repairmentioning

confidence: 99%

<title>Using redundancy to repair video damaged by network data loss</title>

Liu

Claypool

1999

SPIE Proceedings

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With rapid progress in both computers and networks, real-time multimedia applications are now possible on the Internet. Since the Internet was designed to support traditional applications, multimedia applications on the Internet often suffer from unacceptable delay, jitter and data loss. Among these, data loss often has the largest impact on quality. In this paper, we propose a new forward error correction technique for video that compensates for lost packets, while maintaining minimal delay. Our approach transmits a small, low-quality redundant frame after each full-quality primary frame. In the event the primary frame is lost, we display the low-quality frame, rather than display the previous frame or retransmit the primary frame. To evaluate our approach, we simulated the effect of network data loss on MPEG video clips and repaired the data loss by using the redundancy frame. We conducted user studies to experimentally measure users' opinions on the quality of the video streams in the presence of data loss, both with and without our redundancy approach. In addition we analyzed the system overhead incurred by the redundancy. We find that video redundancy can greatly improve the perceptual quality of video the presence of network data loss. The system overhead that redundancy introduces is dependent on the quality of the redundant frames, but a typical redundancy overhead will be approximately 10% that of primary frames alone.

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“…As was shown in [21,22] for the standard deviation in Eq. 11 as follows: 12) gives, for the same number N , an upper bound on the probability of error in the estimation of µ usingμ k .…”

Section: Performance Bounds and Analysis Of The Dejittering Schemementioning

confidence: 68%

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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Transmission of MPEG-2 video streams over ATM

Cited by 35 publications

References 11 publications

User-oriented QoS in packet video delivery

User-oriented QoS in packet video delivery

<title>Using redundancy to repair video damaged by network data loss</title>

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

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