1. A system for managing media contents, comprising: a text classifier, configured to: classify subtitle information of a media content to be marked according to defined subjects, and obtain content clips of different subjects; and a media content marking unit, configured to: mark start time and end time of each played content clip of a different subject after contents are classified by the text classifier, obtain the content clips which have the start time and the end time information and different subjects, match the content clips with concepts in an ontology library, and mark the content clips through terms defined in the ontology library, wherein the media content marking unit further comprises: a media content extracting unit, configured to: obtain the media ID of the media content to be marked, obtain the corresponding subtitle information according to the media ID, identify subtitle content information in the subtitle information, and mark the subtitle content information chronologically to form multiple media content time segments; a content classifying and locating unit, configured to: mark the start time and the end time of each played content clip of a different subject after the contents are classified by the text classifier according to the start time and end time information of the media content time segments, and obtain multiple content clips which have the start time and end time information and different subjects; and a marking and matching unit, configured to: match the content clips with the concepts in the ontology library, wherein the concept clips are marked by the content classifying and locating unit with the start time and end time information and have different subjects; and mark the content clips through the terms defined in the ontology library.
1. A system for managing media contents, comprising: a text classifier, configured to: classify subtitle information of a media content to be marked according to defined subjects, and obtain content clips of different subjects; and a media content marking unit, configured to: mark start time and end time of each played content clip of a different subject after contents are classified by the text classifier, obtain the content clips which have the start time and the end time information and different subjects, match the content clips with concepts in an ontology library, and mark the content clips through terms defined in the ontology library, wherein the media content marking unit further comprises: a media content extracting unit, configured to: obtain the media ID of the media content to be marked, obtain the corresponding subtitle information according to the media ID, identify subtitle content information in the subtitle information, and mark the subtitle content information chronologically to form multiple media content time segments; a content classifying and locating unit, configured to: mark the start time and the end time of each played content clip of a different subject after the contents are classified by the text classifier according to the start time and end time information of the media content time segments, and obtain multiple content clips which have the start time and end time information and different subjects; and a marking and matching unit, configured to: match the content clips with the concepts in the ontology library, wherein the concept clips are marked by the content classifying and locating unit with the start time and end time information and have different subjects; and mark the content clips through the terms defined in the ontology library. 5. The system of claim 1 , wherein each term in the ontology library has a unique resource ID.