Transmission of digital videos over band limited and possibly error-prone channels is an important source of temporal impairments, such as reduced frame rates, frame freezings, and frame droppings. This often results in a non fluent and non smooth presentation of video during playback. Perceptually, this is called jerkiness. In this paper a model of perceived jerkiness is proposed. It can be applied to video sequences showing any pattern of jerkiness, with constant or variable frame rate. It includes a parametrisation of the viewing condition. Thus, it can be used to predict jerkiness from small to large resolutions. The model is compared to data from subjective experiments containing a large variety of temporal degradations and spanning the whole range of currently used video resolutions from QCIF up to HD. On this data it shows excellent performance. The model does not require any comparison to a reference signal. Therefore, it can be applied to no-reference monitoring approaches.
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