1. A content creation support apparatus, comprising: a processor, programmed to perform a speech synthesis on a first text including an original string to generate a synthesized speech of the first text; perform a speech recognition on the synthesized speech to obtain a second text including a recognized string resulting from the speech recognition; extract feature values by performing a morphological analysis on each of the first text and the second text, the feature values each including one of pronunciations of the original string and the recognized string; obtain a first difference string and a second difference string by extracting a difference between the first text and the second text, and to compare a first feature value that indicates one of the feature values corresponding to the first difference string and a second feature value that indicates one of the feature values corresponding to the second difference string, the first difference string that is a string in the first text including a difference from the second text, the second difference string that is a string in the second text including a difference from the first text; present one or more correction candidates according to the second feature value; and select at least one of the correction candidates in accordance with an instruction from a user.
1. A content creation support apparatus, comprising: a processor, programmed to perform a speech synthesis on a first text including an original string to generate a synthesized speech of the first text; perform a speech recognition on the synthesized speech to obtain a second text including a recognized string resulting from the speech recognition; extract feature values by performing a morphological analysis on each of the first text and the second text, the feature values each including one of pronunciations of the original string and the recognized string; obtain a first difference string and a second difference string by extracting a difference between the first text and the second text, and to compare a first feature value that indicates one of the feature values corresponding to the first difference string and a second feature value that indicates one of the feature values corresponding to the second difference string, the first difference string that is a string in the first text including a difference from the second text, the second difference string that is a string in the second text including a difference from the first text; present one or more correction candidates according to the second feature value; and select at least one of the correction candidates in accordance with an instruction from a user. 4. The apparatus according to claim 1 , wherein the extracting feature values further extracts, as each of the feature values, a word class and a document element that indicates a component of a document in the first text.