Digital video transmission system for transmitting digital video data

摘要

Digital video transmission system (Digital Visual Interface) format or HDMI DVI (High Definition Multimedia Interface) is provided. Transmitting unit, receiving unit, and reception reinforcement device of the digital video transmission system according to the invention comprises a power supply circuit. Power supply circuit includes a second power supply unit to the receiving unit and the first power supply unit to the transmitting unit. Power output terminal of the second power supply unit and the first are connected to each other. External input to the respective second power supply unit and the first - power supply voltage is output through the power output terminal. External input to the second power supply unit and the first - both the supply voltage becomes lower than the set voltage, of the second power supply unit and a first, be any one, with the display device and the host device internal from the communication line between - the power supply voltage is output through the power output terminal.