There are provided a memory 4d for accumulating content data and storing a presentation device identifier unique to each presentation device; a display 4a for outputting the content data; a communication interface 4c for receiving a switching control signal instructing switching of the content data output by the display 4a; a database 2 for accumulating management information for associating a presentation device identifier, a content identifier identifying the content to be output by each content presentation device, and presentation time information on the time presenting each content; a timer unit 12 for periodically measuring the elapse time; and a CPU 4b for switching the content data output from the display 4a on the basis of the management information and the measurement time of the timer unit 12. Thus, it is possible to provide information following, on a real time base, the change of population distribution changing depending upon the respective areas.
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机译：提供了用于存储内容数据并存储每个呈现设备唯一的呈现设备标识符的存储器4d。显示器4a用于输出内容数据;通信接口4c，用于接收指示显示器4a输出的内容数据的切换的切换控制信号。数据库2，该数据库2用于累积管理信息，该管理信息用于关联呈现装置标识符，识别将由每个内容呈现装置输出的内容的内容标识符，以及与呈现每个内容的时间有关的呈现时间信息;计时器单元12，用于周期性地测量经过时间; CPU 4b和CPU 4b，CPU 4b用于基于管理信息和计时器单元12的测量时间来切换从显示器4a输出的内容数据。因此，可以在实时的基础上提供以下信息的变化：人口分布因地区而异。
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