System, method and apparatus for wirelessly providing a display data channel between a generalized content source and a generalized content sink
A system, method and apparatus for implementing a wireless point-to-point interface that securely and robustly delivers media content from a generalized content source to a generalized content sink. The system, method and apparatus performs in a manner that is sufficiently secure and robust to serve as a replacement for the delivery of High-Definition Multimedia Interface (HDMI) content or Digital Video Interface (DVI) content over cable. An aspect of the present invention performs Inter-Integrated Circuit (I 2 C) decoding and encoding operations to implement a wireless HDMI or DVI interface between the generalized content source and the generalized content sink. The I 2 C decoding and encoding operations are performed as necessary to support the reception, decoding and transmission of a Display Data Channel (DDC) channel.
1 . A wireless media adapter, comprising:
a digital media interface coupled to a media device over an Inter-Integrated Circuit (I 2 C) bus; and
a wireless transceiver coupled to the digital media interface;
wherein the digital media interface and the wireless transceiver are configured to wirelessly relay a portion of an I 2 C transaction between the media device and a remote wireless media adapter, thereby providing a Display Data Channel (DDC) channel.
2 . The wireless media adapter of claim 1 , wherein the digital media interface is a High-Definition Media Interface (HDMI) interface.
3 . The wireless media adapter of claim 2 , wherein the HDMI interface is coupled to the media device over a Consumer Electronics Control (CEC) bus.
4 . The wireless media adapter of claim 3 , wherein the HDMI interface and the wireless transceiver are configured to wirelessly relay a portion of a CEC transaction between the media device and the remote wireless media adapter, thereby providing a CEC channel.
5 . The wireless media device of claim 4 , wherein the portion of the CEC transaction is a byte of the CEC transaction.
6 . The wireless media adapter of claim 1 , wherein the digital media interface is a Digital Video Interface (DVI) interface.
7 . The wireless media device of claim 1 , wherein the portion of the I 2 C transaction is a byte of the I 2 C transaction.
8 . The wireless media adapter of claim 1 , wherein the digital media interface is configured to receive the portion of the I 2 C transaction from the media device and provide the portion of the I 2 C transaction to the wireless transceiver.
9 . The wireless media adapter of claim 8 , wherein the digital media interface releases a Serial Clock Line (SCL) of the I 2 C bus from a low state to receive the portion of the I 2 C transaction.
10 . The wireless media adapter of claim 8 , wherein the digital media interface holds a Serial Clock Line (SCL) of the I 2 C bus in a low state after receiving the portion of the I 2 C transaction to prevent the media device from providing a next portion of the I 2 C transaction.
11 . The wireless media adapter of claim 8 , wherein the wireless transceiver is configured to convert the portion of the I 2 C transaction to a format suitable for wireless transmission.
12 . The wireless media adapter of claim 11 , wherein the wireless transceiver is further configured to wirelessly transmit a reformatted version of the portion of the I 2 C transaction to the remote wireless media device.
13 . The wireless media adapter of claim 1 , wherein the wireless transceiver is configured to receive a wireless signal from the remote wireless media adapter comprising a reformatted version of the portion of the I 2 C transaction.
14 . The wireless media adapter of claim 13 , wherein the wireless transceiver is further configured to decode the reformatted version of the portion of the I 2 C transaction to recover the portion of the I 2 C transaction.
15 . The wireless media adapter of claim 14 , wherein the digital media interface is configured to provide the portion of the I 2 C transaction to the media device.
16 . The wireless media adapter of claim 15 , wherein the digital media interface releases a Serial Clock Line (SCL) of the I 2 C bus from a low state to provide the portion of the I 2 C transaction to the media device.
17 . The wireless media adapter of claim 15 , wherein the digital media interface holds a Serial Clock Line (SCL) of the I 2 C bus in a low state after providing the portion of the I 2 C transaction to the media device to prevent the media device from sampling a Serial Data Line (SDL) of the I 2 C bus
18 . The wireless media adapter of claim 1 , wherein the media device is a media source.
19 . The wireless media adapter of claim 18 , wherein the digital media interface is configured to operate as a I 2 C slave.
20 . The wireless media adapter of claim 1 , wherein the media device is a media sink.
21 . The wireless media adapter of claim 20 , wherein the digital media interface is configured to operate as a I 2 C master.
22 . A method for wirelessly relaying a portion of an Inter-Integrated Circuit (I 2 C) transaction from a media device to a remote wireless media adapter, comprising:
receiving the portion of the I 2 C transaction from the media device;
converting the portion of the I 2 C transaction to a format suitable for wireless transmission; and
wirelessly transmitting a reformatted version of the portion of the I 2 C transaction to the remote wireless media adapter, thereby providing a Display Data Channel (DDC) channel between the media device and the remote wireless media adapter.
23 . The method of claim 22 , wherein receiving the portion of the I 2 C transaction comprises releasing a Serial Clock Line (SCL) of an I 2 C bus from a low state to notify the media device to provide the portion of the I 2 C transaction.
24 . The method of claim 22 , further comprising holding a Serial Clock Line (SCL) of an I 2 C bus in a low state to prevent the media device from providing a next portion of the I 2 C transaction.
25 . The method of claim 22 , wherein wirelessly transmitting comprises wirelessly transmitting the reformatted version of the portion of the I 2 C transaction over a wireless control channel.
26 . The method of claim 22 , wherein the portion of the I 2 C transaction comprises a byte of the I 2 C transaction.
27 . A method for wirelessly relaying a portion of an Inter-Integrated Circuit (I 2 C) transaction from a remote wireless media adapter to a media device, comprising:
receiving a wireless signal from the remote wireless media adapter, the wireless signal comprising a reformatted version of the portion of the I 2 C transaction;
decoding the reformatted version of the portion of the I 2 C transaction to recover the portion of the I 2 C transaction; and
providing the portion of the I 2 C transaction to the media device.
28 . The method of claim 27 , wherein receiving further comprises receiving the wireless signal over a wireless control channel.
29 . The method of claim 27 , wherein providing the portion of the I 2 C transaction comprises releasing a Serial Clock Line (SCL) of an I 2 C bus from a low state.
30 . The method of claim 27 , further comprising holding a Serial Clock Line (SCL) of an I 2 C bus in a low state after providing the portion of the I 2 C transaction to prevent the media device from sampling a Serial Data Line (SDL) of an I 2 C bus.
31 . The method of claim 27 , wherein the portion of the I 2 C transaction comprises a byte of the I 2 C transaction.