HDMI Alt Mode over USB-C
E242394
HDMI Alt Mode over USB-C is a specification that allows HDMI audio and video signals to be transmitted directly over a USB Type-C connector without needing an active adapter.
All labels observed (1)
| Label | Occurrences |
|---|---|
| HDMI Alt Mode over USB-C canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2190167 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: HDMI Alt Mode over USB-C Context triple: [DisplayPort Alt Mode, alternativeTo, HDMI Alt Mode over USB-C]
-
A.
DisplayPort Alt Mode
DisplayPort Alt Mode is a USB-C feature that allows a device to transmit native DisplayPort video and audio signals over a USB Type-C connector for direct connection to external displays.
-
B.
USB Type-C
USB Type-C is a compact, reversible USB connector standard designed to support high-speed data transfer, power delivery, and versatile connectivity across modern electronic devices.
-
C.
USB4
USB4 is a high-speed, next-generation USB standard that unifies data, video, and power delivery over a single USB-C connector, based on Thunderbolt 3 technology.
-
D.
HDMI
HDMI (High-Definition Multimedia Interface) is a widely used digital standard for transmitting high-definition audio and video between devices such as media players, computers, and displays over a single cable.
-
E.
USB 3.2
USB 3.2 is a high-speed Universal Serial Bus standard that significantly increases data transfer rates and improves performance and efficiency over earlier USB versions.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: HDMI Alt Mode over USB-C Target entity description: HDMI Alt Mode over USB-C is a specification that allows HDMI audio and video signals to be transmitted directly over a USB Type-C connector without needing an active adapter.
-
A.
DisplayPort Alt Mode
DisplayPort Alt Mode is a USB-C feature that allows a device to transmit native DisplayPort video and audio signals over a USB Type-C connector for direct connection to external displays.
-
B.
USB Type-C
USB Type-C is a compact, reversible USB connector standard designed to support high-speed data transfer, power delivery, and versatile connectivity across modern electronic devices.
-
C.
USB4
USB4 is a high-speed, next-generation USB standard that unifies data, video, and power delivery over a single USB-C connector, based on Thunderbolt 3 technology.
-
D.
HDMI
HDMI (High-Definition Multimedia Interface) is a widely used digital standard for transmitting high-definition audio and video between devices such as media players, computers, and displays over a single cable.
-
E.
USB 3.2
USB 3.2 is a high-speed Universal Serial Bus standard that significantly increases data transfer rates and improves performance and efficiency over earlier USB versions.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
HDMI transport mechanism
ⓘ
alternate mode specification ⓘ display interface standard ⓘ |
| allows | transmission of HDMI signals over USB Type-C without active protocol conversion ⓘ |
| announcedInYear | 2016 ⓘ |
| backwardCompatibleWith | existing HDMI displays via passive USB-C to HDMI cable or adapter ⓘ |
| bypasses | USB DisplayPort Alt Mode protocol ⓘ |
| canCoexistWith | other USB-C alternate modes on the same device (implementation dependent) ⓘ |
| competesWith | DisplayPort Alt Mode for USB-C ⓘ |
| definedBy | HDMI Licensing Administrator, Inc. ⓘ |
| doesNotGuarantee | that every USB-C port supports HDMI output ⓘ |
| doesNotRequire | active HDMI protocol converter chip in the adapter ⓘ |
| doesNotSupport | USB data over the same lanes while HDMI Alt Mode is active ⓘ |
| enables | single-cable connection from USB-C device to HDMI display ⓘ |
| isDifferentFrom |
DisplayPort Alt Mode
ⓘ
surface form:
DisplayPort Alt Mode over USB-C
USB-C to HDMI active adapter using DisplayPort to HDMI conversion ⓘ |
| isPartOf | HDMI ecosystem ⓘ |
| isUsedIn |
some laptops with USB-C video output
ⓘ
some tablets and smartphones with USB-C ports ⓘ |
| limitedBy | adoption by device manufacturers ⓘ |
| negotiatedVia | USB Power Delivery configuration channel (CC) pins ⓘ |
| relatedTo |
USB Power Delivery
ⓘ
surface form:
USB Power Delivery specification
USB Type-C Alternate Mode architecture ⓘ |
| requires |
USB Type-C port with HDMI Alternate Mode support
ⓘ
USB-C receptacle wired to expose HDMI Alt Mode pins to the system board ⓘ cable or adapter wired for HDMI Alt Mode ⓘ device-side controller that supports HDMI Alt Mode signaling ⓘ firmware support in the USB-C controller for mode negotiation ⓘ |
| requiresComplianceWith | HDMI compliance testing for Alt Mode implementations ⓘ |
| supportsAudioFormats | multi-channel digital audio as defined by HDMI 1.4b ⓘ |
| supportsColorDepth | up to 24-bit color (per HDMI 1.4b baseline) ⓘ |
| supportsConnectorOrientation | reversible USB Type-C plug orientation ⓘ |
| supportsDisplayType |
HDMI computer monitors
ⓘ
HDMI projectors ⓘ HDMI televisions ⓘ |
| supportsFeature |
HDMI-CEC
ⓘ
surface form:
HDMI Consumer Electronics Control (CEC)
HDMI Ethernet Channel (optional, implementation dependent) ⓘ HDMI audio return channel (ARC) (implementation dependent) ⓘ |
| supportsResolution | up to 4K UHD at 30 Hz ⓘ |
| supportsStandard | HDMI 1.4b feature set ⓘ |
| targetUseCase | connecting USB-C devices directly to HDMI displays ⓘ |
| transportsSignalType |
HDMI audio
ⓘ
HDMI video ⓘ |
| usesBrand | HDMI ⓘ |
| usesConnectorType | USB Type-C ⓘ |
| usesPhysicalLanes | USB Type-C high-speed differential pairs ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: HDMI Alt Mode over USB-C Description of subject: HDMI Alt Mode over USB-C is a specification that allows HDMI audio and video signals to be transmitted directly over a USB Type-C connector without needing an active adapter.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.