| 摘要 |
PURPOSE: To secure the accuracy and operation of the transmission data in a satellite communication karaoke (orchestration without lyrics) system excellent in a low cost, a wide area property, a broadcasting property and a disaster resistance property. CONSTITUTION: A satellite transmitting station 4 and a host computer 8 are connected by an inspecting communication line 22 in addition to a public line 2, and prescribed amounts of karaoke data sent to the satellite transmitting station through the public line are sent back to the host computer through the inspecting communication line, and the set karaoke data are compared with the sent back karaoke data, and only when they agree, prescribed amounts of the karaoke data beforehand sent to the satellite transmitting station are sent to a communication satellite. A set 23 of a standby computer and a standby database nearly equal to a set of the host computer and a main data base is provided in a host base station 1, and when a functional defect occurs in a set of the main data base, it is switched to a set of the standby data base, and the operation is continued. |
