1. A method of recognizing speech, the method comprising: (a) dividing first speech into frames, the first speech being input into a speech recognizing apparatus; (b) converting the frames of the first speech into frames of second speech by applying at least one conversion rule to each of the divided frames; and (c) using the speech recognizing apparatus to recognize the frames of the second speech, wherein (b) comprises converting the frames of the first speech into the frames of the second speech by reflecting at least one frame from among frames that are previously positioned with respect to a frame of the first speech.