SMPTE ST 2110 vs. NDI: Choosing the Right IP Video Protocol

The transition from Serial Digital Interface (SDI) to Internet Protocol (IP) based routing is a fundamental change in broadcast engineering, but it requires navigating two very different technical standards: SMPTE ST 2110 and NDI. Both protocols allow video and audio to be sent over standard computer networks, but they are designed for different use cases and budgets.

SMPTE ST 2110 is the heavy-duty, professional broadcast standard. It works by “unbundling” the video, audio, and metadata into separate streams, allowing for ultra-low latency and uncompressed quality. This makes it the undisputed choice for top-tier live sports, major network news, and large-scale facility builds. However, ST 2110 is complex to implement and requires a highly managed, high-bandwidth network infrastructure—typically 10Gbps or higher—to function correctly. It is a capital-intensive solution meant for environments where compromise on quality or timing is not an option.

On the other hand, NDI (Network Device Interface) is a software-defined protocol that uses compression to fit high-quality video into standard 1Gbps Ethernet networks. It is highly flexible and much easier to deploy, as it can often run on existing network hardware. This makes NDI ideal for corporate AV, remote productions, and web-based streaming services where agility and cost are primary concerns. While it involves a small amount of compression and latency compared to ST 2110, for many applications, the difference is negligible.

Choosing between the two depends on your infrastructure and your production goals. Large-scale broadcasters often opt for ST 2110 to ensure future-proof, uncompressed pipelines. Smaller studios or decentralized production teams often find that the speed and simplicity of NDI allow them to scale more quickly without a massive investment in specialized networking gear.