In this article, we address the issue of audiovisual asset management and description through the scope of TV production in all its diversity. One specific ability desired by TV production is to enable content repurposing and thus to handle the technical, structural and editorial components of an asset separately while binding them together. Repurposing also implies to describe audiovisual content with a high-level vocabulary understandable by both production contributors and information systems. In the light of these specific requirements, we present a generic conceptual model to represent audiovisual asset. In addition, we define an asset annotation model based on the audiovisual scripting vocabulary as well as a new approach to asset description.