2. The apparatus of claim 1 , wherein the character string information extractor comprises: an interlude section extractor for extracting a keyword for an interlude section from a character string contained in the extracted lyric information; and a character string repetition number extractor for calculating a distance between two character strings in the extracted lyric information and extracting the number of repetitions of character strings.
2. The apparatus of claim 1 , wherein the character string information extractor comprises: an interlude section extractor for extracting a keyword for an interlude section from a character string contained in the extracted lyric information; and a character string repetition number extractor for calculating a distance between two character strings in the extracted lyric information and extracting the number of repetitions of character strings. 3. The apparatus of claim 2 , wherein the distance between two character strings is calculated using sim(S I ,S J )=A I,J /max(I,J) when A I,J is the number of the same characters within each character string and max(I,J) is a greater number of characters within the character strings S I and S J .