Patent ID: 8208020
Filing Date: 2012-06-26
Classification: G06F,H04B,H04N

Abstract:
1. A surveillance camera system having a camera unit and a control recording unit, which transfers data between the camera unit and the control recording unit by using power line communication, in which: the camera unit comprises a camera processing unit which obtains information of image and sound at a monitored place and performs desired processing on the information to generate a camera signal, a first power line communication processing unit which performs processing necessary for the power line communication on the camera signal to generate a first power line communication information signal, a first power source unit which converts supplied AC power into first DC power, selects either the first DC power or second DC power supplied from a first built-in DC power source unit, and supplies the power to the camera processing unit and the first power line communication processing unit, and a first AC/signal superimposition separating selecting unit which transmits a first power line communication signal obtained by superimposing the first power line communication information signal on the AC power to the control recording unit through the AC power line, separates the AC power, and supplies the power to the first power source unit when the unit is connected to an AC power line and the AC power is supplied to the AC power line; transmits only the first power line communication information signal to the control recording unit through the AC power line when the AC power is not supplied to the AC power line, and the control recording unit comprises a second AC/signal superimposition separating selecting unit which separates the first power line communication information signal and the AC power from the first power line communication signal received from the camera unit through the AC power line and supplies the above when the unit is connected to the AC power line and the AC power is supplied to the AC power line; supplies only the first power line communication information signal received from the camera unit through the AC power line when the AC power is not supplied to the AC power line, a second power line communication processing unit which receives the first power line communication information signal supplied from the second AC/signal superimposition separating selecting unit to obtain the camera signal, a camera control recording processing unit which receives the camera signal supplied from the second power line communication processing unit and records the information of the image and the sound of the monitored place, and a second power source unit which converts the AC power supplied from the second AC/signal superimposition separating selecting unit into third DC power, selects either the third DC power or fourth DC power supplied from a second built-in DC power source unit, supplies the power to the camera control recording processing unit and the second power line communication processing unit.