4. The system of claim 3 , wherein the input data and commentary processing unit further comprises a commentary analysis unit for receiving the data of the commentary from the input data analysis unit, separating the data of the functional commentary which can be analyzed from the received data, and transferring data of a simple commentary other than the data of the functional commentary or the data of the commentary necessary for the rendering to the content analysis unit.
5. The system of claim 4 , wherein the input data and commentary processing unit further comprises a sentence structure filtering unit for receiving the data of the functional commentary from the commentary analysis unit and separating the sentence structure having the multimedia format from the sentence structures included in the data of the functional commentary.