11. The joint decoding method of claim 8 , wherein the calculating of the probability calculates a probability by combining the tokenization probability of each of the generated candidate tokens and an N-gram language model.
8. A joint decoding method of joining a tokenization process and a translation process, the joint decoding method comprising: generating a candidate token by generating a plurality of candidate tokens by applying a maximum entropy model to an input character sequence; calculating a probability by combining a tokenization probability of each of the generated candidate tokens and a language model; processing out of vocabularly (OOV) by using a word count and discount information for an OOV among the generated candidate tokens; and conducting a translation that generates a corresponding phrase corresponding to the input character sequence by using calculated probability values of the candidate tokens and an OOV processing result.