Cell Loss and Error Recovery in Variable Rate Video

doi:10.1006/jvci.1993.1004

Journal of Visual Communication and Image Representation

Volume 4, Issue 1, March 1993, Pages 39-45

https://doi.org/10.1006/jvci.1993.1004 Get rights and content

Abstract

Cell loss in ATM transport appears to be a critical factor affecting the quality of a video signal. The loss of a single cell can cause a synchronization failure in the decoding process, which in turn can lead to objectionable degradation in picture quality. In this paper, we investigate issues in applying error correction coding to variable bit rate video signals. We use a block interleaving scheme based on Reed-Solomon codes and describe an algorithm for detecting and locating lost cells. Results indicate that with a bit error rate of 10^-9, we could allow a network cell loss rate of up to 10^-4 without exceeding an effective cell loss rate (after correction) of 10^-10.

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Cited by (4)

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1999, Journal of Visual Communication and Image Representation
In modern visual communications, transmitted data may be discarded because of network congestion. With the constraint on transmission delay, the lost data cannot be retransmitted and therefore may cause a fatal degradation on the visual quality. In this paper, we discuss some topics of delivering MPEG video over networks for robust transmission. Not only are relevant techniques introduced, but we also present an empirical bandwidth allocation strategy. The essential motivation of the proposed strategy is to eliminate the burst of MPEG video streams and thereby retain the quality of visual service. The experimental results indicate that the proposed strategy can allocate an effective bandwidth for MPEG video streams. Moreover, the proposed strategy can still maintain the same level of network utilization that compares to the optimum solution, which is found based on an exhaustive search.
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Performance analysis of cell discarding techniques for best effort video communications over ATM networks
1998, Computer Networks
With increasing interest in the transmission of audio–visual applications over ATM best effort services, efficient video-oriented control mechanisms for improving the video quality in the presence of loss have to be designed. In this paper, we propose and evaluate two new slice-based discard schemes for use with available bit rate and guaranteed frame rate services (e.g. formerly UBR+). The schemes adaptively and selectively adjust the discard level to switch buffer occupancy and video cell payload types. To improve their performance, we also introduce a dynamic frame-level priority data partition technique based on MPEG data structure and feedback from the network. To support these mechanisms, enhancements to the ATM adaptation layer 5 and a new MPEG-2 encapsulation strategy are also proposed. The presented quality of picture (QoP) control framework is evaluated using simulation and actual MPEG video data. The overall aim of the framework is double. First, ensuring a graceful picture quality degradation by minimizing cell loss probability for critical video data, and second optimizing the network effective throughput by reducing transmission of non useful data. In comparison to previous approaches, the performance evaluation have shown a significant reduction of the bad throughput and minimization of losses of intra- and predictive-coded frames at both cell and slice layers.
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Regular ArticleCell Loss and Error Recovery in Variable Rate Video

Abstract

Regular Article
Cell Loss and Error Recovery in Variable Rate Video