General Purpose Media Interface (GPMI) is an upcoming standard for an

audio/video interface Audio connectors and video connectors are electrical or optical connectors for carrying audio or video signals. Audio interfaces or video interfaces define physical parameters and interpretation of signals. Some connectors and interfaces carry ...

for transmitting

uncompressed video Uncompressed video is digital video that either has never been compressed or was generated by decompressing previously compressed digital video. It is commonly used by video cameras, video monitors, video recording devices (including general-pur ...

data and compressed or uncompressed

digital audio Digital audio is a representation of sound recorded in, or converted into, digital signal (signal processing), digital form. In digital audio, the sound wave of the audio signal is typically encoded as numerical sampling (signal processing), ...

data from a source device, such as a

display controller A video display controller (VDC), also called a display engine or display interface, is an integrated circuit which is the main component in a video-signal generator, a device responsible for the production of a TV video signal in a computing ...

, to a

computer monitor A computer monitor is an output device that displays information in pictorial or textual form. A discrete monitor comprises a electronic visual display, visual display, support electronics, power supply, Housing (engineering), housing, electri ...

video projector A video projector is an image projector that receives a video signal and projects the corresponding image onto a projection screen using a lens system. Video projectors use a very bright ultra-high-performance lamp (a special mercury arc l ...

digital television Digital television (DTV) is the transmission of television signals using Digital signal, digital encoding, in contrast to the earlier analog television technology which used analog signals. At the time of its development it was considered an ...

, or

. GPMI is intended to be a successor to

HDMI High-Definition Multimedia Interface (HDMI) is a proprietary digital interface used to transmit high-quality video and audio signals between devices. It is commonly used to connect devices such as televisions, computer monitors, projectors, gam ...

developed by Chinese companies. The GPMI standard will be released in phases: home entertainment, automotive/transportation, and industrial applications. GPMI is developed by the Shenzhen 8K UHD Video Industry Cooperation Alliance (SUCA) that includes over fifty Chinese member companies, including

Huawei Huawei Technologies Co., Ltd. ("Huawei" sometimes stylized as "HUAWEI"; ; zh, c=华为, p= ) is a Chinese multinational corporationtechnology company in Longgang, Shenzhen, Longgang, Shenzhen, Guangdong. Its main product lines include teleco ...

Skyworth Skyworth (), officially Skyworth Group Co., Ltd., is a Chinese holding company. Its subsidiaries design, manufacture and sell televisions and other audio-visual products. They also invest in properties. Headquartered in Nanshan High-tech Park, S ...

Hisense Hisense Group Co., Ltd. is a Chinese multinational major appliance and electronics manufacturer headquartered in Qingdao, Shandong province. Television sets are its main product, and it has been the largest TV manufacturer in China by market ...

, and

TCL TCL or Tcl or TCLs may refer to: Business * TCL Technology, a Chinese consumer electronics and appliance company ** TCL Electronics, a subsidiary of TCL Technology * Texas Collegiate League, a collegiate baseball league * Trade Centre Limited ...

. It is unclear whether GPMI will be a

free Free may refer to: Concept * Freedom, the ability to act or change without constraint or restriction * Emancipate, attaining civil and political rights or equality * Free (''gratis''), free of charge * Gratis versus libre, the difference betw ...

standard or whether manufacturers will be required to pay a license fee as with HDMI.

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. 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.

Security

GPMI supports the ADCP content protection protocol. ADCP is based on China's national security cryptographic algorithms, including SM3 and SM4. ADCP will feature frame-level encryption. Authentication is claimed to be faster than

HDCP High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection developed by Intel Corporation to prevent copying of digital audio and video content as it travels across connections. Types of connections include DisplayPort ...

. 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 Consumer Electronics Control (CEC) is a feature of HDMI designed to control HDMI connected devices by using only one remote controller; individual CEC enabled devices can command and control each other without user intervention, for up to 15 device ...

Network

GPMI will be able to carry network traffic, removing the need for connected devices to connect directly to the 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

References

External links

GPMI Whitepaper
(PDF, in Chinese)
Shenzhen 8K UHD Video Industry Cooperation Alliance
(SUCA) (in Chinese) {{DEFAULTSORT:Hdmi Audiovisual connectors Audiovisual introductions in 2025 Computer connectors Computer display standards Digital display connectors High-definition television Chinese inventions Television technology Television terminology Television transmission standards Video signal Serial buses