a digest playback method involves accumulating plural pieces of information data each piece indicating information , selecting any one of plural pieces of information data responding to an input operation , reproducing information according to one piece of information data selected , detecting an information reproduction frequency for each of plural pieces of data , and , in response to a digest playback command , digest reproducing the information being in an order based on the number of the information reproducing frequency for the plural pieces of information data . the method , thus , provides the digest playback of the information which is expected that the user wants to really see and listen to from the recorded information .