To provide a digital data distribution system and method for improving convenience in a personal digital assistant.

In the digital data distribution system, by a server system, audio data or character data corresponding to character information are acquired from analog information (step S210), image data corresponding to image information are acquired from the analog information (steps S220 - S230), and digital data including the audio data or the character data and the image data are prepared beforehand (step S240). By a client system, the digital data are received, the audio data are reproduced as audio in the case that the digital data include the sound data, and the character data are displayed as superimposed characters in the case that the digital data include the character data as output information corresponding to the character information, and the image data included in the digital data are displayed as images as the output information corresponding to the image information.