NVOD or Near Video on Demand is a video delivery service. It allows a viewer to choose from a restricted number of broadcast video channels when they are broadcast. NVOD channels are used for Pay-Per-View services and they have pre-designated schedule times. In NVOD, programmes made available for selection are broadcast at staggered intervals (e.g. 20 minute) on a group of channels, so that the viewer can select the most suitable start-time.