Ntt Docomo, Inc.

Ntt Advanced Technology Corporation

Mariko Wakaizumi

Tatsuji Nagaoka

Hiroji Saito

Tomoko Matsuura

A user sends a request signal to a delivery management serverby utilizing a mobile stationin response to a broadcast service provided by a broadcast station. The request signal includes a music song ID of music song data segments which the user wants to be delivered and also an address of the destination to which the music song data segments be delivered. Upon the receipt of the request signal, the delivery management serverreturns, in the case of unpopular songs, the music song data segments and a decrypting key for decrypting the data segments, and on the other hand, it returns, in the case of popular songs, only the decrypting key to the mobile stationor a STB. The mobile stationor the STBdecodes, in the case of unpopular songs, the music song data segments received from the delivery management serverby utilizing the decrypting key therefor and on the other hand, it receives, in the case of popular songs, the music song data segments in the broadcast waves provided from the broadcast stationand then decrypts data segments by utilizing the decrypting key received from the delivery management server

Information system, mobile communication terminal, and information method

Program guide information of the program to be broadcast by the broadcast stationis reserved in the EPG serverof the center stationThe EPG serverretrieves for each user, the program satisfying the conditions such as the category of the program registered in the personal information databaseand then transmits the guide information of the retrieved programs to the portable telephoneof a user who has set the conditions, via the communication networkThereby, even if the user is outside the home, if there is a program satisfying the conditions specified by the user, the user can obtain the information concerning the program by utilizing the portable telephoneThen, the user can instruct, with reference to the obtained program information, a recording operation from the portable telephoneto the VTRin the home

APPARATUS FOR TRANSMITTING PROGRAM INFORMATION, COMMUNICATING SYSTEM, METHOD OF TRANSMITTING PROGRAM INFORMATION, METHOD OF INSTRUCTING PROGRAM RECORDING OPERATION, AND METHOD OF INSTRUCTING PROGRAM PURCHASING OPERATION

Growing community of inventors

Tokyo, Japan

Mariko Wakaizumi