In recent years, digital broadcasting services have started up and spread all over the world. Digital broadcasting is one of the most promising infrastructures to provide interactive services aimed at consumers. However, the broadcast bandwidth has an upper bound limitation. This paper describes our proposition, a hypermedia model, called Time-lined Hypermedia, which is designed to provide a large hypermedia navigation space in a limited broadcast bandwidth. We also describe an implementation for time-lined hypermedia called Digital Video eXtension system.