Apparatus and method for tagging topic to content

An apparatus for tagging a topic to content based on a viewing situation, the apparatus comprising:

• an unstructured data-based topic generator configured to generate a topic model comprising an unstructured data-based topic based on the content and unstructured data, wherein the content includes at least one of content-related unstructured data and external unstructured data, the content-related unstructured data including subtitles and content dialogue, and the external unstructured data including a blog post and news;
• a viewer group analyzer configured to analyze a characteristic of a viewer group comprising a viewer of the content based on a social network of the viewer and viewing situation information of the viewer;
• a multifaceted topic generator configured to generate a multifaceted topic based on the topic model and the characteristic of the viewer group;
• a content divider configured to divide the content into a plurality of scenes;
• and
• a tagger configured to tag the multifaceted topic to a scene obtained through the division,
• wherein the unstructured data-based topic generator, the viewer group analyzer, the multifaceted topic generator, the topic divider, and the tagger each comprise a processing unit including a processor running software to cause the processing unit to perform the functions of the unstructured data-based topic generator, the viewer group analyzer, the multifaceted topic generator, the topic divider, and the tagger, respectively.