| 摘要 |
PURPOSE:To disable a person other than subscribers to receive chargeable information while maintaining an efficient communication between many terminal devices and a host station by sequentially sending data frames with listed discrimination codes added to music data. CONSTITUTION:When requests from terminal devices arrive through an up stream line 11, music codes and the discrimination codes (ID) of the terminal devices are written in a request table 12 in order of arrival. At this time, the requests are stored in the request table 12 at a certain interval of time, Then when a certain period of time is elapsed, the data in the request table 12 are read out and rearranged in the unit of requested music to generate a music selection unit table 13. Then a data base 14 is retrieved according to the music codes of the music selection unit table 13 and data frames 15 at every music are generated and sent under equal conditions toward the terminal devices through a down stream line 16. |
