In this paper, we introduce a novel metadata model for describing scalable and interactive TV services that can be enriched with supplemental multimedia information. The model allows users to access such TV services not only via their traditional TV sets, but also via additional mobile devices like TabletPCs or PDAs. To achieve this, we segment the traditional linear program into sub-components, while separating device-independent and device-specific metadata. A realization of this model builds on the existing standards of TV-Anytime, MPEG-7 and MPEG-21. The model achieves a step towards the "Connected world" vision of the second specification phase of the TV-Anytime forum.