GPMI
| Type | Digital audio/video/data connector | ||
|---|---|---|---|
| Production history | |||
| Designed | April 2025 | ||
| Hot pluggable | Yes | ||
| External | Yes | ||
| Video signal | Maximum resolution limited by available bandwidth | ||
| Data | |||
| Data signal | Yes | ||
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.[1] 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.[2][3][1][4][5] It is unclear whether GPMI will be a free standard or whether manufacturers will be required to pay a license fee as with HDMI.[6]
Specifications
[edit]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.[7] 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.
| Standard | Bandwidth | Power delivery | Notes |
|---|---|---|---|
| GPMI Type-B | 192 Gbps | 480W | Uses a proprietary connector. |
| GPMI Type-C | 96 Gbps | 240W | Uses USB-C connector. Same power limit as the Extended Power Range (EPR) standard. |
Security
[edit]GPMI supports the ADCP content protection protocol. ADCP is based on China's national security cryptographic algorithms, including SM3 and SM4.[2] 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
[edit]GPMI will include the ability to control connected devices, similar to HDMI-CEC.[3]
Network
[edit]GPMI will be able to carry network traffic, removing the need for connected devices to connect directly to the network.[1]
Link types
[edit]- Main Link (ML) – Supports 4-channel and 8-channel transmission.[1] 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.[1]
- Sideband Link (SL) – management of devices, ports, and bandwidth[1]
- CableInfo Link (CL) – cable insertion and hot plug detection[1]
- Power Link (PL) – bidirectional power supply[1]
- USB2.0 Link (UL) – USB protocol ecosystem[1]
See also
[edit]References
[edit]- ^ a b c d e f g h i "China's General Purpose Media Interface "GPMI" set to deliver up to 192Gbps of bandwidth and 480W power through a single USB cable". VideoCardz.com. Retrieved 2025-04-06.
- ^ a b "GPMI：一线通联，创新无界". www.hisilicon.com (in Chinese). Retrieved 2025-04-08.
- ^ a b Jowi Morales (2025-04-06). "China launches HDMI and DisplayPort alternative — GPMI boasts up to 192 Gbps bandwidth, 480W power delivery". Tom's Hardware. Retrieved 2025-04-06.
- ^ "中國推出自己的 GPMI 接口規格 支援 480W 供電 192Gbps 頻寬". HKEPC Hardware. Retrieved 2025-04-06.
- ^ 财经头条. "中国高清视频接口GPMI发布，支持480W大功率快充". t.cj.sina.com.cn. Retrieved 2025-04-06.
- ^ "GPMI is a Chinese alternative to HDMI and DisplayPort with up to 192 GBPS bandwidth, 480W Power Delivery - CNX Software". 7 April 2025.
- ^ "What is GPMI, the new standard that may make HDMI, Thunderbolt and DisplayPort obsolete?". The Indian Express. 2025-04-10. Retrieved 2025-04-10.
External links
[edit]- GPMI Whitepaper (PDF, in Chinese)
- Shenzhen 8K UHD Video Industry Cooperation Alliance (SUCA) (in Chinese)
