GPMI
{{Short description|Digital audiovisual data interface}}{{Infobox connector
| name = GPMI
General Purpose Media Interface
| type = Digital audio/video/data connector
| logo =
| image =
| caption =
| designer =
| design_date = {{start date and age|2025|04|}}
| manufacturer =
| superseded =
| superseded_by =
| superseded_by_date =
| external = Yes
| hotplug = Yes
| length =
| width =
| height =
| electrical =
| ground =
| maximum_voltage =
| maximum_current =
| audio_signal =
| video_signal = Maximum resolution limited by available bandwidth
| data_signal = Yes
| data_bit_width =
| data_bandwidth =
| data_devices =
| data_style =
| physical_connector =
| num_pins =
| pinout_image =
| pinout_caption =
| pinout_notes =
}}
General Purpose Media Interface (GPMI) is an upcoming standard for an audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from a source device, such as a display controller, to a computer monitor, video projector, digital television, or digital audio. GPMI is intended to be a successor to HDMI developed by Chinese companies.
The GPMI standard will be released in phases: home entertainment, automotive/transportation, and industrial applications.{{Cite web |title=China's General Purpose Media Interface "GPMI" set to deliver up to 192Gbps of bandwidth and 480W power through a single USB cable |url=https://videocardz.com/newz/chinas-general-purpose-media-interface-gpmi-set-to-deliver-up-to-192gb-of-bandwidth-and-480w-power-through-a-single-usb-cable |access-date=2025-04-06 |website=VideoCardz.com |language=en-US}} GPMI is developed by the Shenzhen 8K UHD Video Industry Cooperation Alliance (SUCA) that includes over fifty Chinese member companies, including Huawei, Skyworth, Hisense, and TCL.{{Cite web |author1=Jowi Morales |date=2025-04-06 |title=China launches HDMI and DisplayPort alternative — GPMI boasts up to 192 Gbps bandwidth, 480W power delivery |url=https://www.tomshardware.com/tech-industry/china-launches-hdmi-and-displayport-alternative-gpmi-boasts-up-to-192-gbps-bandwidth-480w-power-delivery |access-date=2025-04-06 |website=Tom's Hardware |language=en}}{{Cite web |title=中國推出自己的 GPMI 接口規格 支援 480W 供電 192Gbps 頻寬 |url=https://www.hkepc.com/23403/%E4%B8%AD%E5%9C%8B%E6%8E%A8%E5%87%BA%E8%87%AA%E5%B7%B1%E7%9A%84_GPMI_%E6%8E%A5%E5%8F%A3%E8%A6%8F%E6%A0%BC_%E6%94%AF%E6%8F%B4_480W_%E4%BE%9B%E9%9B%BB__192Gbps_%E9%A0%BB%E5%AF%AC |access-date=2025-04-06 |website=HKEPC Hardware}}{{Cite web |last=财经头条 |title=中国高清视频接口GPMI发布,支持480W大功率快充 |url=https://t.cj.sina.com.cn/articles/view/1677177940/63f7b45401901e3ag |access-date=2025-04-06 |website=t.cj.sina.com.cn}} It is unclear whether GPMI will be a free standard or whether manufacturers will be required to pay a license fee as with HDMI.{{cite web |date=7 April 2025 |title=GPMI is a Chinese alternative to HDMI and DisplayPort with up to 192 GBPS bandwidth, 480W Power Delivery - CNX Software |url=https://www.cnx-software.com/2025/04/07/gpmi-is-a-chinese-alternative-to-hdmi-and-displayport-with-up-to-192-gbps-bandwidth-480w-power-delivery/}}
Specifications
GPMI supports data transmission rates up to 192 Gbps, accommodating ultra-high-definition video content such as 8K at 120 frames per second. It can power devices with up to 480 W of power.{{Cite web |date=2025-04-10 |title=What is GPMI, the new standard that may make HDMI, Thunderbolt and DisplayPort obsolete? |url=https://indianexpress.com/article/technology/tech-news-technology/gpmi-general-purpose-media-interface-vs-hdmi-thunderbolt-usb-displayport-9932681/ |access-date=2025-04-10 |website=The Indian Express |language=en}} GPMI combines multiple signal types—including information flow, control signals, power supply, and audio/video—into a single cable, simplifying connectivity. It utilizes a sideband interaction channel to reduce device wake-up times to a quarter of those in comparable technologies. GPMI enables multi-channel bidirectional video transmission and mesh networking. GPMI operates in two modes.
class="wikitable"
|+ !Standard !Bandwidth !Power delivery !Notes |
colspan="1" |GPMI Type-B
| colspan="1" |192 Gbps | colspan="1" |480W |Uses a proprietary connector. |
colspan="1" |GPMI Type-C
| colspan="1" |96 Gbps | colspan="1" |240W |Uses USB-C connector. Same power limit as the Extended Power Range (EPR) standard. |
= Security =
GPMI supports the ADCP content protection protocol. ADCP is based on China's national security cryptographic algorithms, including SM3 and SM4.{{Cite web |title=GPMI:一线通联,创新无界 |url=https://www.hisilicon.com/cn/White-Paper-Technical-Guide/white-paper/gpmi-innovation |access-date=2025-04-08 |website=www.hisilicon.com |language=zh}} ADCP will feature frame-level encryption. Authentication is claimed to be faster than HDCP. ADCP will feature secure communication between devices in a multi-node configuration. Two devices in a chain can communicate securely even with another device connected in between, reducing man-in-the-middle attacks.
= Control =
GPMI will include the ability to control connected devices, similar to HDMI-CEC.
= Network =
= Link types =
- Main Link (ML) – Supports 4-channel and 8-channel transmission. Each channel can contain 24 Gbps of unidirectional data. For example, in 8+0 configuration, 8 channels (192 Gbps) are dedicated to forward transmission with 0 channels to reverse transmission. In 6+2 configuration, 6 channels (144 Gbps) are dedicated to forward transmission with 2 channels (48 Gbps) dedicated to reverse transmission.
- Sideband Link (SL) – management of devices, ports, and bandwidth
- CableInfo Link (CL) – cable insertion and hot plug detection
- Power Link (PL) – bidirectional power supply
- USB2.0 Link (UL) – USB protocol ecosystem
See also
References
{{Reflist}}
External links
- [https://www.hisilicon.com/cn/White-Paper-Technical-Guide/white-paper/gpmi-innovation GPMI Whitepaper] (PDF, in Chinese)
- [http://www.suca.org.cn/ Shenzhen 8K UHD Video Industry Cooperation Alliance] (SUCA) (in Chinese)
{{High-definition}}
{{AVconn}}
{{Audio and video interfaces and connectors}}
{{Digital audio and video protocols}}
{{portal bar|Electronics|Technology|Television|Video games}}
{{DEFAULTSORT:Hdmi}}
Category:Audiovisual connectors
Category:Audiovisual introductions in 2025
Category:Computer display standards
Category:Digital display connectors
Category:High-definition television
Category:Television technology
Category:Television terminology