Patent ID: 8738809
Filing Date: 2014-05-27
Classification: G09G,H04L,H04N

Abstract:
1. A device, comprising: an HDMI (High-Definition Multimedia Interface) output terminal connectable to one of a first HDMI input terminal and a second HDMI input terminal of another device, the first HDMI input terminal having a first physical address assigned thereto, the second HDMI input terminal having a second physical address assigned thereto; detection means for detecting a connection of the HDMI output terminal to one of the first and second HDMI input terminals; read means for reading the first physical address from the another device when the connection of the HDMI output terminal to the first HDMI input terminal is detected and for reading the second physical address from the another device when the connection of the HDMI output terminal to the second HDMI input terminal is detected; transmission means for transmitting the read one of the first and second physical addresses to the another device via the HDMI output terminal; means for receiving a periodic polling message from the another device and for sending an acknowledgement to the another device in response to receipt of the polling message, in which the polling message conforms to a CEC (consumer electronics control) protocol and is addressed to a logical address associated with the device, and in which the acknowledgement is sent prior to receiving a request from the another device for the transmission means to transmit the read one of the first and second physical addresses to the another device; storage means for storing, when the detection means detects the connection to the first HDMI input terminal and the read means reads the first physical address from the another device, the first physical address; and update means for updating, when the detection means detects that the HDMI output terminal is no longer connected to the first HDMI input terminal and detects the connection of the HDMI output terminal to the second HDMI input terminal and the read means reads the second physical address from the another device, the stored first physical address to the read second physical address.