US Patent 7421187 Reproducing apparatus and superimposing method

In an AV server system, it is facilitated to grasp the entire structure of an AV server and determine which position a failed resource assumes in the entire AV server. On the basis of a file which describes resources of the AV server, resources forming the AV server are displayed in a hierarchical form on a screen. When a fault has occurred in any resource, the range from the highest class down to the class to which the failed resource belongs is displayed on one picture.