Patent ID: 7035586

Claim:
An interconnection method for establishing a bi-directional communication between two audio and/or video devices situated in different rooms in a building, a first of the two audio and/or video devices including a source of audio and/or video electrical signals controllable by a remote-control signal, the second of the two audio and/or video devices comprising a receiver and a remote control of the type generating a remote-control signal unable to pass through the walls or partitions of a building, said method comprising the steps of: a) picking up, on the second audio and/or video device side, a remote-control signal emitted by the remote control and retransmitting, by radio link, remote-control information contained in the remote-control signal picked up; b) receiving, on the first audio and/or video device side, the remote-control information retransmitted by radio link, resending said remote-control information in the form of said remote-control signal to the audio and/or video signal source in order to control the functioning of the latter, and sending, by radio link, audio and/or video signals delivered by said audio and/or video signal source in response to the remote-control signal; and c) receiving, on the second audio and/or video device side, the audio and/or video signals sent by radio link and delivering said audio and/or video signals thus received to the receiver of the second audio and/or video device; characterized in that the method further comprises the steps of; d) inserting, on the second audio and/or video device side, a code in the remote-control information sent by the remote control, so as to transmit coded remote-control information to the first audio and/or video device; and e) decoding, on the first audio and/or video device side, decoding the coded remote-control information received, comparing the code contained in the coded remote-control information received with a reference code, and rejecting the decoded remote-control information in the event of non-agreement between the two codes, wherein the remote-control information emitted by the remote control consists of an information bit frame, and wherein the coding is effected by replacing a start of each information bit in the frame with a code word composed of several code bits having, in total, a duration shorter than that of an information bit in the frame.