Patent ID: 8799979
Filing Date: 2014-08-05
Classification: H04N

Abstract:
1. An electronic apparatus, comprising: a signal receiver configured to receive a video signal from an external apparatus via a transmission path using a plurality of channels and a differential signal; a communication network interface configured to perform bi-directional communication using predetermined lines forming the transmission path; a command transmitting circuitry configured to transmit, over a control data line other than the predetermined lines to the external apparatus, in response to a determination using a first line of the predetermined lines that the electronic apparatus is connected to the external apparatus, a firewall turn-off command for requesting turning off of a firewall against the communication unit, wherein the firewall turn-off command is transmitted using the control data line of the transmission path; and wherein the firewall turn-off command contains an internet protocol address, a port number, a MAC address and a vendor specific command, and the firewall against the communication unit is automatically turned off at the external apparatus by a firewall open process in response to receipt of the firewall turn-off command at the external apparatus; and a response receiving circuitry configured to receive, from the external apparatus over the control data line other than the predetermined lines, a firewall turn-off response indicating that the firewall against the communication network interface is turned off, wherein in response to the firewall turn-off response being received over the control data line other than the predetermined lines by the response receiving circuitry, the communication network interface recognizes that the bi-directional communication using the predetermined lines forming the transmission path is now enabled and then performs the bi-directional communication with the external apparatus, wherein the communication unit network interface that performs bi-directional communication is formed using a reserve line representing Ether-line and an HDP line representing Ether+ line of an HDMI cable.