| 摘要 |
PROBLEM TO BE SOLVED: To provide structure capable of supplying larger power at the time of abnormality, etc. while suppressing the useless power at the time of a normal operation regarding a monitor camera apparatus which confirms a visitor, etc. by displaying a video image from a terminal part installed at the entrance on a monitor of a control part installed in a room. SOLUTION: A constant current power source supplied from the control part 20 to the terminal part 1 through a first path 8 is impressed as a power source of an imaging part 2 provided in the terminal part 1, a constant voltage power source supplied from the control part 20 through a second path 9 is applied to the switch part 6 and when the level of the sound signal transmitted through the first path 8 is equal to or higher than a predetermined level in the switch part 6, the constant voltage power source is selectively supplied as a power source of a speaker amplifier 3 which amplifies the separated sound signal and supplies it to a speaker 16 in place of the constant current power source. COPYRIGHT: (C)2005,JPO&NCIPI
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