Abstract: Provided is a mobile phone which converts an input first word to a second word, displays the second word, extracts voice data corresponding to the second word and outputs the extracted voice data and a method of converting a word and outputting the converted word as a voice in the mobile phone. Furthermore, there is also provided a mobile phone which receives and stores a composite video signal including an audio signal and a video signal, inputs a playback point of the stored composite video signal and a playback speed exceeding 1X and plays the sound and image corresponding to the stored composite video signal from the input playback point at the input playback speed and a composite image processing method of the mobile phone.