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000086614 005__ 20190316233741.0
000086614 0247_ $$2doi$$a10.1006/rtim.1999.0175
000086614 02470 $$2ISI$$a000083372100003
000086614 037__ $$aARTICLE
000086614 245__ $$aUser-Oriented QoS Analysis in MPEG-2 Video Delivery
000086614 269__ $$a1999
000086614 260__ $$c1999
000086614 336__ $$aJournal Articles
000086614 520__ $$aWe address the problem of video quality prediction and control for high-resolution video transmitted over lossy packet networks. In packet video, the bitstream flows through several subsystems (coder, network, decoder); each of them can impair the information, either by data loss or by introducing some delay. However, each of these subsystems can be fine- tuned in order to minimize these problems and to optimize the quality of the delivered signal, taking into account the available bitrate. The assessment of the end-user quality is a non-trivial issue. We analyse how the user-perceived quality is related to the average encoding bitrate for variable bit rate MPEG-2 video. We then show why simple distortion metrics may lead to inconsistent interpretations. Furthermore, for a given coder setup, we analyse the effect of packet loss on the user-level quality. We then demonstrate that, when jointly studying the impact of coding bit rate and packet loss, the reachable quality is upperbound and exhibits one optimal coding rate for a given packet loss ratio.
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000086614 6531_ $$apacket
000086614 6531_ $$arate-distortion
000086614 6531_ $$aVBR
000086614 6531_ $$avideo
000086614 700__ $$aVerscheure, O.
000086614 700__ $$0241061$$g101475$$aFrossard, P.
000086614 700__ $$aHamdi, M.
000086614 773__ $$j5$$tReal-Time Imaging$$k5$$q305-314
000086614 8564_ $$uhttps://infoscience.epfl.ch/record/86614/files/Verscheure1999_17.pdf$$zn/a$$s538029
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