Abstract: An information transmission system, for transmitting data relating to a plan and destination of traveling prepared in advance, depending upon the destination and time on the travel, by using a portable terminal having transmission function of data, comprising a portable terminal, and a travel server memorizing personal data and various kinds of data therein, wherein the travel server produces travel information necessary for the travel to each person, upon the basis of the personal data including destination information of travel, and the various kinds of data, and transmit it from the travel server to the portable terminal, depending upon location information of the portable terminal and time information programmed in advance, thereby enabling the traveler to obtain the necessary information at the destination on traveling, so as to carry out activities, smoothly, on the day.

Abstract: A broadcast content that is at least a part of an original content is broadcasted, and a differential content, which is at least a part of the original content, is transmitted in response to a request from a reception terminal. The differential content and the broadcast content are merged with each other to reproduce a perfect original content. Therefore, the perfect original content can be obtained at low price and in short time even when the original content contains a large amount of data.