| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio doorphone system which can be easily installed, is improved in user-friendliness, and is further improved in practical use by wirelessly connecting a doorphone with an in-house speech communication device and making the in-house communication device portable. SOLUTION: The connectability between the doorphone and the speech communication device is improved using a digital radio communication system. A large capacity storage such as a harddisk is provided on the master set of the speech communication device to enable recording video images or audios. In addition, image analysis is performed to analyze the video information of a visitor. COPYRIGHT: (C)2006,JPO&NCIPI
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