HDMI communication over twisted pairs
First Claim
Patent Images
1. A link configured to connect between first and second ports, comprising:
- a first port coupled to a Transition Minimized Differential Signaling (TMDS) source device configured to generate TMDS data that comprises uncompressed high definition video, and coupled to a first device configured to generate bidirectional data in source-to-sink direction;
the first port is configured to multiplex the TMDS data and the bidirectional data in source-to-sink direction into a multiplexed stream, and to transmit the multiplexed stream to a second port utilizing a first frequency band, over a cable having 8 wires, selected from a group of;
CAT5, CAT5e, CAT6, CAT6a, and CAT7;
a second port coupled to a TMDS sink device and coupled to a second device;
the second port is configured to generate a back-channel stream in sink-to-source direction, and to transmit the back-channel stream to the first port, over the cable, utilizing a second frequency band that at least partially overlaps with the first frequency band; and
wherein the first port is further configured to transmit and receive, in a full duplex mode, over each of at least one of the wires, both the multiplexed stream and the back-channel stream.
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Abstract
A method of transmitting a data stream over a communication channel, the method comprising: providing symbol sets having different numbers of symbols; modulating data in the data stream that warrant different degrees of protection against noise onto symbols from symbol sets having different numbers of symbols, wherein which symbol set given data in the stream is modulated onto is independent of symbol sets onto which other data in the data stream is modulated onto; and transmitting the symbols.
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Citations
33 Claims
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1. A link configured to connect between first and second ports, comprising:
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a first port coupled to a Transition Minimized Differential Signaling (TMDS) source device configured to generate TMDS data that comprises uncompressed high definition video, and coupled to a first device configured to generate bidirectional data in source-to-sink direction;
the first port is configured to multiplex the TMDS data and the bidirectional data in source-to-sink direction into a multiplexed stream, and to transmit the multiplexed stream to a second port utilizing a first frequency band, over a cable having 8 wires, selected from a group of;
CAT5, CAT5e, CAT6, CAT6a, and CAT7;a second port coupled to a TMDS sink device and coupled to a second device; the second port is configured to generate a back-channel stream in sink-to-source direction, and to transmit the back-channel stream to the first port, over the cable, utilizing a second frequency band that at least partially overlaps with the first frequency band; and wherein the first port is further configured to transmit and receive, in a full duplex mode, over each of at least one of the wires, both the multiplexed stream and the back-channel stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for operating a link, comprising:
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receiving from a High-Definition Multimedia Interface (HDMI) source, over a first set of wires, HDMI Transition Minimized Differential Signaling (HDMI TMDS) data that comprises uncompressed high definition video, and HDMI control data over a different set of wires; modulating the HDMI TMDS data with a first modulation providing a first level of protection against noise, and modulating the HDMI control data with a second modulation providing a second level of protection against noise; multiplexing the modulated HDMI TMDS data and the modulated HDMI control data; and transmitting, using a first frequency band, the multiplexed data over a cable having 8 wires, selected from a group of;
CAT5, CAT5e, CAT6, CAT6a, and CAT7,in a full duplex mode, while receiving simultaneously, using a second frequency band, a data channel over at least a subset of the 8 wires;
wherein the second frequency band at least partially overlaps with the first frequency band.- View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A communication link comprising:
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a multiplexor configured to multiplex unidirectional Transition Minimized Differential Signaling (TMDS) source data and bidirectional data in a first direction into multiplexed data; and a transceiver configured to transmit the multiplexed data, over a cable made of wires, in a full duplex mode, utilizing a first frequency band, while receiving bidirectional data in a second direction over at least a subset of the wires utilized for the transmission of the multiplexed data, wherein the received bidirectional data utilizes a second frequency band that at least partially overlaps with the first frequency band;
wherein the multiplexed data comprises at least two different modulations providing different levels of protection against noise, and the different modulations use at least partially overlapping subsets of the same symbol set. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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Specification