1. A method for computer-aided annotating of multimedia data including a sequence of digitized images, comprising: analyzing, executed by a computer, the multimedia data to detect objects in the multimedia data; assigning, executed by the computer, each object to a role, with role assigning being ascertained by processing context information representing at least one model of the multimedia data; and assigning, executed by the computer, the objects to object classes, with each object class formed of classified objects identified as similar, wherein a pair of the classified objects in one of the object classes are identified as similar using an object-specific similarity measure based on at least one of visual, phonetic and geometric characteristics of the classified objects.