User-oriented QoS in packet video delivery

Verscheure, Olivier; Garcia, X.; Karlsson, Gunnar; Hubaux, Jean-Pierre

doi:10.1109/65.752641

Cited by 49 publications

(23 citation statements)

References 20 publications

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“…In the next-generation advanced networks, these multimedia communication services will come to be widespread. Therefore, it is an essential element to guarantee multiple Quality of Services (QoSs) so that users have these services comfortably [1,2].…”

Section: Introductionmentioning

confidence: 99%

An efficient method to search for the location of network services with multiple QoSs guarantee

Kawano

Masuda

Kinoshita

et al. 2002

Electron. Comm. Jpn. Pt. I

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SUMMARYFor future multimedia communication networks, it is an essential element to guarantee multiple QoSs so that users have satisfactory services. Thus, recently, many QoS routing algorithms have been proposed. However, they merely select a point-to-point path which has sufficient resources for the request for QoSs. Therefore, it is difficult to search for the location of the service which is provided according to their request and to select a feasible path from the service provider to the originating node by QoS routing alone. Furthermore, for multimedia communications, there are many service providers which provide the same service content, and each of them attaches individual QoS values to their service content. There are, however, few studies of methods to search for the location of services which are provided with these QoSs. Therefore, in this paper, a new method to search for the location of services with multiple QoS guarantee is proposed. It allows fast searching by utilizing the link state. Finally, we show by simulation experiments that the proposed method has good performance.

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Section: Introductionmentioning

confidence: 99%

An efficient method to search for the location of network services with multiple QoSs guarantee

Kawano

Masuda

Kinoshita

et al. 2002

Electron. Comm. Jpn. Pt. I

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“…However, the macroblock loss probability [see (2)] becomes and is now given by with (16) where still represents the number of RTP packets within the same slice before and excluding . represents the number of packets containing part of the macroblock .…”

Section: B the Adaptive Protection Algorithm: Amispmentioning

confidence: 99%

AMISP: a complete content-based MPEG-2 error-resilient scheme

Frossard

Verscheure

2001

IEEE Trans. Circuits Syst. Video Technol.

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Abstract-We address a new error-resilient scheme for broadcast quality MPEG-2 video streams to be transmitted over lossy packet networks. A new scene-complexity adaptive mechanism, namely Adaptive MPEG-2 Information Structuring (AMIS) is introduced. AMIS modulates the number of resynchronization points (i.e., slice headers and intra-coded macroblocks) in order to maximize the perceived video quality, assuming that the encoder is aware of the underlying packetization scheme, the packet loss probability (PLR), and the error-concealment technique implemented at the decoding side. The end-to-end video quality depends both on the encoding quality and the degradation due to data loss. Therefore, AMIS constantly determines the best compromise between the rate allocated to encode pure video information and the rate aiming at reducing the sensitivity to packet loss. Experimental results show that AMIS dramatically outperforms existing structuring techniques, thanks to its efficient adaptivity. We then extend AMIS with a forward-error-correction (FEC)-based Protection algorithm to become AMISP. AMISP triggers the insertion of FEC packets in the MPEG-2 video packet stream. Finally, the performances of the AMISP scheme in an MPEG-2 over RTP/UDP/IP scenario are evaluated.

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“…Interactive video delivery can significantly be improved by providing sender-side mechanisms [1]. These include 1) structuring techniques [2]- [4] and scalable coding [5], [6] to reduce data loss sensitivity, and 2) forward error correction (FEC) mechanisms to lower the probability of loss at the application layer.…”

mentioning

confidence: 99%

Joint source/FEC rate selection for quality-optimal MPEG-2 video delivery

Frossard

Verscheure

2001

IEEE Trans. on Image Process.

Self Cite

110

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Abstract-This paper deals with the optimal allocation of MPEG-2 encoding and media-independent forward error correction (FEC) rates under a total given bandwidth. The optimality is defined in terms of minimum perceptual distortion given a set of video and network parameters. We first derive the set of equations leading to the residual loss process parameters. That is, the packet loss ratio (PLR) and the average burst length after FEC decoding. We then show that the perceptual source distortion decreases exponentially with the increasing MPEG-2 source rate. We also demonstrate that the perceptual distortion due to data loss is directly proportional to the number of lost macroblocks, and therefore decreases with the amount of channel protection. Finally, we derive the global set of equations that lead to the optimal dynamic rate allocation. The optimal distribution is shown to outperform classical FEC scheme, thanks to its adaptivity to the scene complexity, the available bandwidth and to the network performance. Furthermore, our approach holds for any standard video compression algorithms (i.e., MPEG-x, H.26x).Index Terms-End-to-end quality, lossy networks, media-independent FEC, perceptual quality, rate selection, video services.

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User-oriented QoS in packet video delivery

Cited by 49 publications

References 20 publications

An efficient method to search for the location of network services with multiple QoSs guarantee

An efficient method to search for the location of network services with multiple QoSs guarantee

AMISP: a complete content-based MPEG-2 error-resilient scheme

Joint source/FEC rate selection for quality-optimal MPEG-2 video delivery

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