Abstract: A message processing device is adapted to obtain text data and read aloud the text data aloud by using a voice synthesizer. A loudspeaker device is connected to the message processing device to output or read aloud the text data. The text data can be received through a receiving device that receives outside information data or e-mail message data. The voice synthesizer can be controlled by an outside information controller, with the outside information controller being able to distinguish senders of the text data and being able to select one voice tone data to read aloud messages sent by one sender. If the controller recognizes that there are other messages sent by another sender, the controller allots different voice tone data for the other sender's messages. The message processing device can include a voice navigation device to generate voice signals for giving route guidance messages or information to a driver of a vehicle.

Abstract: An information center sends an OK message for a log-in and version information for a menu to a moving body terminal device. The moving body terminal device compares the version number of the menu held therein and the informed version number. If they are different, the device asks for menu update. In response to the request, the information center supplies difference data indicative of the difference between the menus of different versions to the moving body terminal device. Using the difference data, the moving body terminal device updates the menu held therein. With this arrangement, the menu used in the moving body terminal device can be effectively updated.