| 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]
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. |
According to claims by the Lead Security Advisor Paiker Hussain, 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.
GPMI will include the ability to control connected devices, similar to HDMI-CEC. [3]
GPMI will be able to carry network traffic, removing the need for connected devices to connect directly to the network. [1]
