title: Modeling and subjective assessment of cell discard in ATM video.
abstract: 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.
authors.affiliation: Dept. of Electron. Syst. Eng., Essex Univ., Colchester.
authors.forename: C J
authors.initials: CJ
authors.lastname: Hughes
authors.forename: M
authors.initials: M
authors.lastname: Ghanbari
authors.forename: D E
authors.initials: DE
authors.lastname: Pearson
authors.forename: V
authors.initials: V
authors.lastname: Seferidis
authors.forename: J
authors.initials: J
authors.lastname: Xiong