초록 ▼

An information offering system which allows users to obtain desired information readily while minimizing the effect that the users' knowledge and/or skill level has on the information retrieval time and information retrieval cost. The information offering system is composed of a center CE as an info

An information offering system which allows users to obtain desired information readily while minimizing the effect that the users' knowledge and/or skill level has on the information retrieval time and information retrieval cost. The information offering system is composed of a center CE as an information offerer and user terminals TE which receive offers of information from the center CE. The center CE is provided with a transmission antenna AT for transmitting antenna radio wave RF1 to a communication satellite SA. The communication satellite SA transmits re-transmission radio wave RF2 to the terminal TE. Thereby, a satellite broadcasting network is constructed as a first communication mode for offering partial information from the center CE to the terminal TE. A communication network such as ISDN using a cable CA as a medium is also constructed between the center CE and the terminal TE to enable transmission of whole information specified by the terminal TE from the center CE to the terminal TE in a second communication mode.

대표청구항 ▼

[ What is claimed is:] [28.] An information service center for supplying information to a terminal, comprising:storage means for storing whole information and partial information being stored in advance of supplying said information to said terminal, said whole information to be supplied to said ter

[ What is claimed is:] [28.] An information service center for supplying information to a terminal, comprising:storage means for storing whole information and partial information being stored in advance of supplying said information to said terminal, said whole information to be supplied to said terminal, and said partial information including an ID indicating a storage location of said whole information in said storage means, a file name of said whole information and a sample information created by cutting out information from said whole information;first transmitting means for transmitting said partial information to said terminal in a first communication mode; andsecond transmitting means for transmitting said whole information specified by said terminal based on said partial information to said terminal in a second communication mode.