15. The method for bi-directional sign language/speech translation in real time of claim 14 , wherein the outputting the second sign or the second speech comprises: generating a sign index to translate into the second sign corresponding to the recognized first speech; and outputting the second sign corresponding to the recognized first speech based on the generated sign index.
15. The method for bi-directional sign language/speech translation in real time of claim 14 , wherein the outputting the second sign or the second speech comprises: generating a sign index to translate into the second sign corresponding to the recognized first speech; and outputting the second sign corresponding to the recognized first speech based on the generated sign index. 16. The method for bi-directional sign language/speech translation in real time of claim 15 , wherein the generating comprises: converting the recognized first speech into a text using a predefined sign language dictionary; and determining a sign index with respect to the text based on the text and the used pattern of sign language by the user.