4. A method for displaying caption data in a device, the method comprising: receiving content data including video data; if original caption data is included in the content data, performing error checking for the original caption data and generating corrected caption data by correcting one or more errors of the original caption data; extracting one or more high-difficulty words from the corrected caption data; generating a sign language animation corresponding to each of the one or more high-difficulty words, wherein the sign language animation includes explanation data for explaining each of the one or more high-difficulty words; determining at least one special effect corresponding to at least one word included in the original caption data or the explanation data, wherein the at least one special effect includes vibrations, color light, heat, chill, or fragrance corresponding to the at least one word included in the original caption data or the explanation data; and while displaying the video data, simultaneously providing the corrected caption data, the sign language animation, and the at least one special effect.
4. A method for displaying caption data in a device, the method comprising: receiving content data including video data; if original caption data is included in the content data, performing error checking for the original caption data and generating corrected caption data by correcting one or more errors of the original caption data; extracting one or more high-difficulty words from the corrected caption data; generating a sign language animation corresponding to each of the one or more high-difficulty words, wherein the sign language animation includes explanation data for explaining each of the one or more high-difficulty words; determining at least one special effect corresponding to at least one word included in the original caption data or the explanation data, wherein the at least one special effect includes vibrations, color light, heat, chill, or fragrance corresponding to the at least one word included in the original caption data or the explanation data; and while displaying the video data, simultaneously providing the corrected caption data, the sign language animation, and the at least one special effect. 7. The method of claim 4 , further comprising: if a user input for displaying an another language-based sign language animation is received, translating at least a portion of the corrected caption data into an another language-based sign language; generating the another language-based sign language animation based on the translated another language-based sign language; and displaying the another language-based sign language animation.