System and method for providing virtual pan-tilt-zoom, PTZ, video functionality to a plurality of users over a data network

摘要

A system for providing virtual pan-tilt-zoom, PTZ, video functionality video to a plurality of users over a data network is provided. The system includes one or more network video cameras positioned to make a video recording of a real-world target field, or a respective subarea thereof, and output a respective raw video segment onto the data network, a back-end camera calibration unit which is adapted to obtain a relative position and orientation of the respective network video camera with respect to a three dimensional world space for the target field, and to save the obtained relative position and orientation as metadata for the respective network video camera, a back-end video processing unit, connected to the data network and adapted to receive the respective raw video segment(s) recorded by the network video camera(s), and to store or buffer video contents of the respective raw video segment(s) in a back-end video storage, a back-end video streaming unit adapted to stream the stored or buffered video contents and the saved metadata for the respective network video camera onto the data network, a plurality of client devices for use by the plurality of users.