High definition and low power partial functionality communication link

• US 7,835,382 B2
• Filed: 08/17/2008
• Issued: 11/16/2010
• Est. Priority Date: 02/07/2007
• Status: Active Grant

• Current Assignee: Valens Semiconductor Ltd.
• Original Assignee: Valens Semiconductor Ltd.
• Inventors: Lida, Eyran, Banet, Nadav, Avrahami, Avi, Benzaray, Alon, Risling, Micha, Brunin, Zeev, Eyal, Massad
• Primary Examiner(s): Pham; Chi H
• Assistant Examiner(s): Elallam; Ahmed
• Application Number:
  US12/193,009
• Publication Number:
  US 20080301748A1
• Time in Patent Office: 821 Days
• Field of Search: 370/241, 370/253, 370/229, 370/232, 370/431, 370/437, 375/220, 375/222, 375/240.2, 375/295, 375/316, 700/295, 700/297, 725/78, 725/80, 725/85, 725/153
• US Class Current: 370/437
• CPC Class Codes: H04L 25/4919 using balanced multilevel codes H04L25/4927 takes precedence
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453

Abstract

Communication link including a cable containing four pairs of wires, three transmitters to transmit uncompressed video data and audio data over three of the pairs of wires to three receivers, and two transceivers to form a bidirectional multi data type communication link over the fourth pair of wires. An active mode of operation for transmitting the uncompressed video data and the audio data over the three pairs of wires, and for transmitting bidirectional data over the fourth pair of wires. And a first low power partial functionality mode of operation for transmitting bidirectional system controls.

Claims

1. A communication link comprising:

a cable containing four pairs of wires, three transmitters, three receivers, and two transceivers;

the three transmitters operative to transmit uncompressed video data and data over three of the pairs of wires to the three receivers;

the two transceivers operative to form a bidirectional multi data type communication link over the fourth pair of the pairs of wires;

an active mode of operation for transmitting the uncompressed video data over the three pairs of wires from the three transmitters to the three receivers, and for transmitting bidirectional system control data, bidirectional general data, and audio data over the fourth pair of wires between the two transceivers; and

a low-power partial-functionality (LPPF) mode of operation for transmitting over the fourth pair of wires a subset of the data types transmitted in the active mode of operation over the fourth pair of wires.

2. The communication link of claim 1, wherein in the LPPF mode of operation bidirectional system control data are transmitted over the fourth pair of wires.

3. The communication link of claim 2, wherein the uncompressed video data is multiplexed with video control data, and the communication over the fourth pair of wires is half-duplex.

4. The communication link of claim 2, wherein the uncompressed video data is multiplexed with video control data, each of the three transmitters transmits approximately 4.5 Gbps of video and audio, and the communication over the fourth pair of wires is half-duplex.

5. The communication link of claim 1, wherein the three transmitters are further operative to transmit audio data.

6. The communication link of claim 1, wherein in the LPPF mode of operation bidirectional system control data and unidirectional audio are transmitted over the fourth pair of wires.

7. The communication link of claim 1, wherein in the LPPF mode of operation bidirectional system control data and bidirectional general data are transmitted over the fourth pair of the wires in a lower rate than the transfer rate of the bidirectional data in the active mode of operation.

8. The communication link of claim 7, wherein in the active mode of operation, the communication link over the fourth pair of wires transmits half duplex general data in a rate of between about 2 Gbps and 8 Gbps, while in the LPPF mode of operation, the communication link transmits half duplex general data in a rate of about 1 Gbps, 100 Mbps, 10 Mbps, or 1 Mbps.

9. The communication link of claim 1, wherein one or more of the following power reduction techniques is utilized in the LPPF mode of operation:

using different rates, using lower amplitude, transmitting over the link only when there is a need to transmit data, or utilizing simpler modulation.

10. The communication link of claim 1, wherein the general data comprises Ethernet Data.

11. The communication link of claim 1, wherein the wires are made of copper and the transmissions are two level pulse amplitude modulation.

12. The communication link of claim 1, wherein the wires are made of copper and the transmissions utilize 8B/10B encoding.

13. The communication link of claim 1, wherein the LPPF mode of operation transmits in one direction over one of the first three pairs of wires and in the other direction over the fourth pair of wires.

14. The communication link of claim 13, wherein the transmitter transmitting over the one of the first three pairs of wires utilizes a lower rate in the LPPF mode of operation than in the active mode of operation.

15. The communication link of claim 13, wherein the transmitter transmitting over the one of the first three pairs of wires utilizes a simpler modulation in the LPPF mode of operation than in the active mode of operation.

16. A communication link comprising:

a cable containing four pairs of wires, three transmitters, three receivers, and two transceivers;

the three transmitters operative to transmit uncompressed video data and audio data over three of the pairs of wires to the three receivers;

the two transceivers operative to form a bidirectional multi data type communication link over the fourth pair of the pair of wires;

an active mode of operation for transmitting the uncompressed video data and the audio data over the three pairs of wires from the three transmitters to the three receivers, and for transmitting bidirectional data over the fourth pair of wires between the two transceivers; and

a first low-power partial-functionality (LPPF) mode of operation for transmitting bidirectional system control data.

17. The communication link of claim 16, wherein the first LPPF mode of operation transmits over the fourth pair of wires.

18. The communication link of claim 16, wherein the first LPPF mode of operation transmits in one direction over one of the first three pairs of wires and in the other direction over the fourth pair of wires.

19. The communication link of claim 16, further comprising a second LPPF mode of operation for transmitting bidirectional system control data and unidirectional audio.

20. The communication link of claim 19, further comprising a third LPPF mode of operation for transmitting bidirectional system control data and bidirectional general data in a lower rate than the transfer rate of the bidirectional data in the active mode of operation.

21. The communication link of claim 20, wherein the LPPF modes of operation transmit over the fourth pair of wires.

22. The communication link of claim 20, wherein the LPPF modes of operation transmit in one direction over one of the first three pairs of wires and in the other direction over the fourth pair of wires.

23. The communication link of claim 22, wherein the transmitter transmitting over the one of the first three pairs of wires utilizes a lower rate in the LPPF mode of operation than in the active mode of operation.

24. The communication link of claim 22, wherein the transmitter transmitting over the one of the first three pairs of wires utilizes a simpler modulation in the LPPF mode of operation than in the active mode of operation.

25. The communication link of claim 20, wherein in the active mode of operation, the communication link over the fourth pair of wires transmits half duplex general data in a rate of between about 2 Gbps and 8 Gbps, while in the third LPPF mode of operation, the communication link transmits half duplex general data in a rate of about 1 Gbps, 100 Mbps, 10 Mbps, or 1 Mbps.

26. The communication link of claim 16, wherein the bidirectional data transmitted in the active mode of operation comprises one or more of the following:

bidirectional system control data, bidirectional general data, and audio data.

27. The communication link of claim 16, wherein the general data includes Ethernet Data.

28. The communication link of claim 16, wherein one or more of the following power reduction techniques is utilized in the first LPPF mode of operation:

using different rates, using lower amplitude, transmitting over the link only when there is a need to transmit data, or utilizing simpler modulation.

29. The communication link of claim 16, wherein the wires are made of copper and the transmissions are two level pulse amplitude modulation.

30. A communication device comprising:

a cable containing wires, at least one transmitter, and a transceiver;

the at least one transmitter operative to transmit uncompressed video data over a first subset of the wires, and the transceiver operative to transmit bidirectional data comprising at least two data types over a second subset of the wires, wherein the first and the second subsets of the wires do not overlap;

an active mode of operation for transmitting by the transmitter the uncompressed video data over the first subset of the wires, and for transmitting and receiving by the transceiver the bidirectional data over the second subset of the wires; and

a low-power partial-functionality (LPPF) mode of operation for transmitting over a third subset of the wires a subset of the data types transmitted in the active mode of operation over the second subset of the wires.

31. The communication device of claim 30, wherein the bidirectional data transmitted over the second subset of the wires in the active mode of operation comprises:

bidirectional system control data, bidirectional general data, and audio data.

32. The communication device of claim 30, wherein the second subset and the third subset of the wires overlap.

33. The communication device of claim 30, wherein the wires are made of copper and the transmissions utilize 8B/10B encoding.

34. The communication device of claim 30, wherein the LPPF mode of operation transmits in one direction over one pair of the wires of the first subset and in the other direction over one pair of the wires of the second subset.

35. The communication device of claim 34, wherein the transmitter transmitting over the one pair of the wires of the first subset utilizes a lower rate in the LPPF mode of operation than in the active mode of operation.

36. The communication device of claim 34, wherein the transmitter transmitting over the one pair of the wires of the first subset utilizes a simpler modulation in the LPPF mode of operation than in the active mode of operation.

37. The communication device of claim 30, wherein the second subset of the wires comprises two pairs of wires and the LPPF mode of operation transmits in one direction over one pair of the wires of the second subset and in the other direction over the second pair of the wires of the second subset.

38. The communication device of claim 30, wherein the uncompressed video data is multiplexed with video control data, and the communication over the second subset of the wires is half-duplex.

39. The communication device of claim 30, wherein one or more of the following power reduction techniques is utilized in the LPPF mode of operation:

using different rates, using lower amplitude, transmitting over the link only when there is a need to transmit data, or utilizing simpler modulation.