In an HDMI (High Definition Multimedia Interface) video signal transmission system in which a fiber optic cable connects the HDMI transmitter and receiver, the HDMI receiver supplies a DC power to the receiver-side connector of the fiber optic cable on a designated pin of the HDMI interface, such as pin 14 of the Type A interface. The DC power does not affect the AC signal (e.g. ARC) transmitted on this pin under the HDMI specification. The receiver-side connector uses this power to power its internal components such as optical transceiver and signal processing chips. This eliminates the need to supply power to the receiver-side connector via a separate USB cable. One example of the HDMI receiver is a video matrix switch, which acts as a receiver for devices plugged into its input HDMI ports. A fiber optic cable incorporating Bluetooth wireless chips in its two connectors is also disclosed.