Abstract: A method of outputting media content is described. The media content is coded according to a predefined coding scheme to produce coded media content. Enhancement data, comprising information for selectively enhancing at least one portion of the media content, is also supplied. A corresponding method of providing media content is also described, including receiving enhancement data for selectively enhancing at least one portion of the media content and providing enhanced decoded media content for the at least one portion based on the enhancement data. By providing selective enhancements, e.g. of critical portions, a user experience can be improved without requiring a significant increase in bandwidth and enhancements may be delivered over a different channel to the basic data.

Abstract: A method for determining the position and orientation of a camera, which may not rely on the use of special markers. A set of reference images may be stored, together with camera pose and feature information for each image. A first estimate of camera position is determined by comparing the current camera image with the set of reference images. A refined estimate can be obtained using features from the current image matched in a subset of similar reference images, and in particular, the 3D positions of those features. A consistent 3D model of all stored feature information need not be provided.

Abstract: A method for generating a desired view of a real scene from a selected desired viewpoint by identifying objects in a real image, determining the positions of the identified objects, and rendering a view of the scene from a selected viewpoint using image data from the real image to render at least some of the identified objects. Other portions of the rendered view can be rendered using other source data which may be generic or historic. Identified objects may be tracked over a period of time to determine a trajectory or path. A user interface can be provided to assist in object tracking. A number of cameras can be used to provide a number of real images, and certain cameras may be controlled using the parameters of other cameras.