An apparatus comprises a storage unit for storing an article metadata generated when the object existence time information representing the time when the object exist in a video of the audio/video data is associated with the object identification information so as to the object, a music metadata containing the music existence time information representing the time when the music exists in the audio frequency of the audio/video data and an object BGM corresponding information generated by associating the object identification information with the BGM identification information, and a control unit for determining whether the arbitrary time in the audio/video data exists or not to meet the following condition: the time is matched with the time represented by the object existence time information and is not matched with the time represented by the music existence time information, and outputting the BGM identified by the BGM identification information if the time exists to meet the condition, wherein the BGM identification information is associated with the object identification information associated with the object existence time information when the interested time reappear forward.