5. The method of claim 4 , wherein simultaneously providing the corrected caption data, the sign language animation, and the at least one special effect comprises: if a user input for displaying a caption is received, simultaneously displaying the corrected caption data, the sign language animation, and the at least one special effect.
5. The method of claim 4 , wherein simultaneously providing the corrected caption data, the sign language animation, and the at least one special effect comprises: if a user input for displaying a caption is received, simultaneously displaying the corrected caption data, the sign language animation, and the at least one special effect. 6. The method of claim 5 , before extracting the one or more high-difficulty words from the corrected caption data, further comprising: determining whether the one or more high-difficulty words are included in the corrected caption data that is displayed on a display of the device.