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Modeling and subjective assessment of cell discard in ATM video

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5 Author(s)
C. J. Hughes ; Dept. of Electron. Syst. Eng., Essex Univ., Colchester, UK ; M. Ghanbari ; D. E. Pearson ; V. Seferidis
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Measurements of subjective picture impairment as a function of network loading in a simulated ATM network are reported. The simulation indicated that cells tend to be discarded in bursts, the frequency and severity of which can be related to the loading by a threshold model. The effect of the discards on broadcast-style video, coded using a single-layer H.261-type method, was found to be a function of scene content and movement at the instant of occurrence. If the visibility of cell discards is maintained at or below threshold in worst-case scenes, the study indicated that network loadings around 55% for a multiplex of 16 video sources and around 70% for a multiplex of 48 video sources are achievable

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IEEE Transactions on Image Processing  (Volume:2 ,  Issue: 2 )