As modern vehicles continue to integrate advanced driver assistance systems (ADAS), surround-view monitoring, and autonomous driving technologies, the demand for high-speed, low-latency video transmission has surged. Two of the most widely adopted video transmission protocols in this space are FPD-Link III and GMSL2.
But what are the key differences between these two technologies? And how do they affect the choice of GMSL2 cables, FPD-Link III camera cables, and overall system design?
Let's take a closer look.
What Is FPD-Link III?
FPD-Link III (Flat Panel Display Link) is a high-speed video interface protocol developed by Texas Instruments. It is widely used in automotive camera systems due to its ability to transmit uncompressed video, control signals, and power over a single coaxial cable.
Key Features:
- Supports up to 4 Gbps per channel
- Transmits video, I2C control, and power over coax (Power Over Coax - PoC)
- Often paired with Fakra connectors for secure automotive-grade connection
- Ideal for rear-view, front-view, and in-cabin camera systems
Popular Use Case:
OEMs use FPD-Link III camera cables in surround-view systems and driver monitoring cameras for their high video quality and integration flexibility.
What Is GMSL2?
GMSL2 (Gigabit Multimedia Serial Link) is a second-generation serializer/deserializer (SerDes) technology developed by Analog Devices (formerly Maxim Integrated). Like FPD-Link III, GMSL2 also enables high-speed video, control, and power transmission over a single coaxial cable.
Key Features:
- Up to 6 Gbps per link (higher than FPD-Link III)
- Supports multi-stream video and full-duplex control
- Compatible with both coaxial and STP cable types
- Excellent for long cable runs with strong EMI immunity
Popular Use Case:
GMSL camera cables are widely adopted in applications like LiDAR, thermal imaging, and high-resolution front-facing ADAS cameras.
GMSL2 vs FPD-Link III: Key Differences
| Feature | FPD-Link III | GMSL2 |
|---|---|---|
| Max Data Rate | ~4 Gbps | ~6 Gbps |
| Power Over Coax (PoC) | Yes | Yes |
| Multi-Camera Support | Limited | Supported (aggregation possible) |
| Video Compression | Not natively supported | Optional (via external ICs) |
| EMI Performance | Good | Excellent |
| Distance (Coax) | Up to ~15m | Up to ~20m |
About Premier Cable
Premier Cable specializes in custom-built GMSL camera cables, FPD-Link III camera cables, and automotive-grade Fakra cable assemblies. All products are made using original brand components and tested to meet OEM requirements. We offer rapid prototyping, small-batch orders, and full support for custom ADAS and infotainment harnesses.
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