| 词条 | VirtualLink | ||||||||||||||||||||||||||||||||||||||||||||||||
| 释义 |
In VirtualLink mode there are six high-speed lanes active in the USB-C connector and cable: 4 lanes transmit four DisplayPort HBR 3 video streams from the PC to the headset while two lanes implement bidirectional USB 3.1 Gen 2 channel between the PC and the headset. Unlike the classic DisplayPort USB-C alternate mode, VirtualLink has no USB 2.0 channels active, instead providing a higher speed USB 3.1 Gen 2 (SuperSpeed+) over the same A6, A7, B7, B6 pins. VirtualLink also requires the PC to provide 15 to 27 Watts of power.[3][4] To achieve 6 high-speed lanes over USB-C, VirtualLink requires special cables that conform to version 1.3 of the USB Type-C standard and uses shielded differential pairs for both USB 2.0 pairs.[3][5] The available bandwidth is estimated to be equivalent to DisplayPort 1.4 (32.4 Gbps, up to 4K @ 120 Hz with 8bpc color) for video and 10Gbps of USB 3.1 Gen 2 data.[3] Nvidia GeForce 20 series cards, initially released in 2018, implement a single VirtualLink port in all RTX FE cards (2060, 2070, 2080, 2080 Ti).[6] This port is also available on Quadro RTX cards.[7]VirtualLink CableThe virtuallink cable consists of
The USB type-C plugs pinout is (According to section 6.1. of VirtualLink™ Advance Overview):
Unlike most alt-mode; this will also remap A7, A6, B6, B7 to carry USB 3.0 signal, instead of the usual passive usb 2.0 signal. This means that you will not be able to extend the cable using a standard USB 3.0 type-c cable, which has these pins mapped only for usb 2.0 signals. Also this will require the virtuallink port to also detect the correct orientation of the usb type-C plug to ensure that the usb 3.0 TX and RX lanes are correctly connected. See also
References1. ^{{cite web|url=https://www.theverge.com/2018/7/17/17583362/virtuallink-vr-headsets-oculus-valve-microsoft-connect-usb-c-cable|title=The next generation of VR headsets will connect over a single USB-C cable|publisher=The Verge}} 2. ^{{cite web|url=https://www.forbes.com/sites/moorinsights/2018/08/17/virtuallink-everything-usb-type-c-is-supposed-to-be/|title=VirtualLink: Everything USB Type-C Is Supposed To Be|publisher=Forbes|date=2018-08-17}} 3. ^1 2 3 {{Cite web |url=https://www.anandtech.com/show/13088/virtuallink-announced-standardized-connector-for-vr-headsets |title=VirtualLink USB-C Alt Mode Announced: Standardized Connector for VR Headsets |last=Smith |first=Ryan |date=July 17, 2018 |website=AnandTech |access-date=2018-08-21}} 4. ^{{cite web|url=https://www.pcworld.com/article/3290466/virtual-reality/virtual-reality-giants-unveil-virtuallink-as-a-standardized-cable-that-may-simplify-vr-rigs.html|title=Virtual reality giants unveil VirtualLink as a standardized cable that may simplify VR rigs|publisher=PCWorld}} 5. ^{{cite web|url=https://www.eejournal.com/article/virtuallink-removes-tangles-from-vr-goggles/|title=VirtualLink Removes Tangles from VR Goggles|date=7 August 2018|publisher=EEJournal}} 6. ^{{cite web|url=https://www.roadtovr.com/nvidia-geforce-rtx-virtuallink-vr-connector/|title=GeForce RTX Cards Announced with VirtualLink VR Connector|first=Ben|last=Lang|date=20 August 2018|publisher=Road to VR}} 7. ^{{cite web|url=https://nvidianews.nvidia.com/news/nvidia-unveils-quadro-rtx-worlds-first-ray-tracing-gpu|title=NVIDIA Unveils Quadro RTX, World’s First Ray-Tracing GPU|publisher=NVIDIA}} External links
2 : USB|Virtual reality headsets |
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