Sound special reproducing method and information reproducing apparatus

1. Field of the Invention The present invention relates to a method and apparatus for making it easy to understand the contents of sound during special reproduction. Herein, the MPEG multiple separation circuit separates digital data read out from the optical disk into audio data and video data, the sound recognition text conversion circuit converts audio data decoded in the MPEG audio decoder into text data by sound recognition, and the on-screen character processor generates video signals in which the characters representing text data are displayed, being overlapped with reproduced images. In case of special reproduction such as double-speed reproduction, the characters representing text data are displayed, being overlapped with special reproduced images.