Transmission of infrared signals over a high-definition multimedia interface cable
Embodiments described herein enable the transmission of infrared (IR) signals via an AV cable containing a plurality of signal lines. In embodiments, an IR receiver, and IR emitter, and/or logic circuitry may be integrated within an AV cable (e.g., an HDMI cable) to enable transmitting signals from an IR remote control device to a media device that may be located behind a physical obstruction through which IR signals are unable to pass. By utilizing one or more signal lines of an AV cable to transmit IR signals, existing AV communication protocols may continue to be utilized in a user's home entertainment system. In this manner, a user may be able to locate one or more media devices (e.g., home entertainment devices) in a physically remote location, such as in a cabinet or closet, without sacrificing any IR signaling functionality.
1. A High-Definition Multimedia Interface (HDMI) cable, comprising:
a plurality of signal lines, one or more of the plurality of signal lines being configured to carry an audio or video signal;
logic coupled to at least one signal line of the plurality of signal lines, wherein the at least one signal line is at least one of an HDMI Ethernet Audio Control (HEAC) signal line, an Audio Return Channel (ARC) signal line, a Display Data Channel (DDC) signal line, or a Consumer Electronics Control (CEC) signal line, the logic being configured to:
convert an infrared signal received from an infrared receiving device of the HDMI cable to one or more electrical pulses; and
transmit the one or more electrical pulses over the at least one signal line.
2. The HDMI cable of claim 1 , wherein the HDMI cable is an adapter that may be coupled to a connector of another HDMI cable.
3. The HDMI cable of claim 1 , further comprising:
a relay switch coupled to the logic, the logic being further configured to cause the relay switch to enable one of a plurality of operating modes of the HDMI cable.
4. An audio/video (AV) cable, comprising:
a plurality of signal lines, one or more of the plurality of signal lines being configured to carry an audio or video signal;
an infrared (IR) receiver of the AV cable configured to receive one or more IR signals from a remote control device, the one or more received IR signals comprising one or more commands for transmission to a first device via an output terminal coupled to at least one signal line of the plurality of signal lines; and
logic coupled to the at least one signal line, the logic being configured to cause the one or more commands to be transmitted to the first device over the at least one signal line.
5. The AV cable of claim 4 , further comprising:
an IR emitter configured to transmit one or more commands received from the first device over the at least one signal line to a second device;
a relay switch coupled to the logic, an input terminal to the IR emitter, and an output terminal from the IR receiver, and
wherein the logic is further configured to cause the relay switch to enable an operating mode of either the IR emitter or the IR receiver.
6. The AV cable of claim 5 , wherein the logic is further configured to cause the relay switch to enable the operating mode of the IR emitter in response to the logic receiving a pulse from the first device on the at least one signal line.
7. The AV cable of claim 5 , wherein the logic is further configured to cause the relay switch to enable the operating mode of the IR emitter in response to the logic sensing a current on the at least one signal line.
8. The AV cable of claim 5 , wherein the logic is further configured to cause the relay switch to enable the operating mode of the IR emitter in response to the logic sensing a voltage on the at least one signal line.
9. The AV cable of claim 5 , wherein the logic is further configured to cause the relay switch to enable the operating mode of the IR emitter for a temporary duration.
10. The AV cable of claim 5 , where in the logic comprises a microcontroller.
11. The AV cable of claim 4 , wherein the AV cable is a High-Definition Multimedia Interface (HDMI) cable.
12. The AV cable of claim 4 , wherein the at least one signal line is at least one of an HDMI Ethernet Audio Control (HEAC) signal line, an Audio Return Channel (ARC) signal line, a Display Data Channel (DDC) signal line, or a Consumer Electronics Control (CEC) signal line.
13. A method, comprising:
while in a first mode:
receiving one or more IR signals by an IR receiver of an audio/video (AV) cable, the IR signals comprising one or more commands from a remote control device and the AV cable comprising a plurality of signal lines, one or more of the plurality of signal lines being configured to carry an audio or video signal; and
transmitting the one or more commands to a first device over at least one signal line of the plurality of signal lines of the AV cable.
14. The method of claim 13 , further comprising:
while in a second mode:
receiving one or more commands from the first device for transmission to a second device over the at least one signal line; and
transmitting the one or more commands received from the first device to the second device from an IR emitter of the AV cable.
15. The method of claim 14 , further comprising:
switching from the first mode to the second mode based on a pulse transmitted on the at least one signal line.
16. The method of claim 14 , further comprising:
switching from the first mode to the second mode based on sensing a current on the at least one signal line.
17. The method of claim 14 , further comprising:
switching from the first mode to the second mode based on sensing a voltage on the at least one signal line.
18. The method of claim 14 , further comprising:
switching from the first mode to the second mode for a temporary duration.
19. The method of claim 13 , wherein the AV cable is a High-Definition Multimedia Interface (HDMI) cable.
20. The method of claim 13 , wherein the at least signal line is at least one of an HDMI Ethernet Audio Control (HEAC) signal line, an Audio Return Channel (ARC) signal line, a Display Data Channel (DDC) signal line, or a Consumer Electronics Control (CEC) signal line.