ADI's GMSL goes beyond simple video transmission and is a high-speed interface solution optimized for the SDV era, becoming a core infrastructure for future mobility.

At the '2025 e4ds Tech Day' event held on the 9th, ADI (Analog Devices Inc.) Director Seong-ho Son presented on the topic of 'High-Speed Data Transmission Technology for SDV - ADI GMSL', and introduced in detail the SDV architecture and how ADI's GMSL (Gigabit Multimedia Serial Link) solution is applied within it.

Director Son Seong-ho said, “The paradigm of the automobile industry is changing rapidly. “The transition from traditional hardware-centric vehicle design to software-centric ‘Software Defined Vehicle (SDV)’ is accelerating,” he said. “In this trend, ADI is leading the core technologies of future mobility through high-speed interface solutions optimized for the SDV era.”

“SDV defines vehicle functions in software, enabling flexible configuration and customized upgrades,” said Director Seong-ho Son. “To respond to these changes, ADI is providing various solutions, including high-speed video transmission, audio processing, and body control.”

GMSL is an interface technology specialized for fast and stable transmission of image data between high-resolution cameras and display devices.

In particular, GMSL2 and GMSL3 have various functions such as full duplex video transmission, simultaneous transmission of power and data (Power over Coax), adaptive equalization, and sensor data tunneling, respectively.

Director Son Seong-ho explained, “GMSL goes beyond simple video transmission and plays a crucial role in ensuring data integrity and stability between in-vehicle sensors and the central processing unit (SOC).” He added, “GMSL3, in particular, is suitable for high-resolution multi-display environments because it can transmit more data at the same clock using the PAM4 method.”

In addition to GMSL, ADI also provides A2B (Audio to Bus) solutions for in-vehicle audio transmission and SHARC DSP solutions for road noise cancellation and audio processing. A2B enables low-latency transmission and can operate without a separate MCU at the end, simplifying the system.“SHARC contributes to the sound quality of vehicles by enhancing the in-vehicle acoustic environment through high-performance audio processing capabilities,” he said.

Director Seong-ho Son proposed a structure that breaks away from the existing point-to-point method and uses a single serializer as a hub to connect multiple displays simultaneously.

This will reduce the number and weight of cables and increase flexibility in vehicle design.

In addition, a method of concentrating camera data through a zonal structure and simplifying data distribution between SOCs was introduced in ADAS (Advanced Driver Assistance System) sensor connections.

“Future vehicle networks will need to go beyond simple connectivity and simultaneously ensure efficiency and stability,” said Director Son Seong-ho. “ADI’s solutions are optimized to meet these demands.”

He also said, “ADI’s GMSL solution goes beyond simple technology and provides powerful tools to vehicle developers and OEMs in various aspects such as high-speed data transmission, ensuring safety, and simplifying systems, and is positioned as a core infrastructure in the SDV era.”

Director Seong-ho Son concluded his presentation by saying, “The future of automobiles depends on the sophisticated fusion of software and hardware, and ADI will lead technological innovation at the center of this.”