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ST 2110 Suite of Standards

st2110withcolorbard

Professional Video, Audio and Data over IP

Designed to replace the long-lived Serial Digital Interface (SDI) that has been used to build TV stations, Outside Broadcast facilities, and interconnect for Global video networks, 2025 Emmy® Award-winning SMPTE ST 2110 is the result of collaboration and years of work from many Broadcasters, Facilities, Studios, Vendors, Trade Associations, User Groups and a global team of engineers.

The Video Services Forum (VSF) created document TR-03 titled "Technical Recommendation for Transport of Uncompressed Elementary Stream Media Over IP" and brought it to SMPTE in an industry effort to create a new suite of IP standards. The document suite grew to cover accurately timed, independent flows of media across managed IP.

In addition to the foundation provided by the VSF, liaison with the IEEE for Precision Time Protocol (IEEE 1588 PTP) has resulted in updates within SMPTE and IEEE to improve PTP operation. Liaison with Audio Engineering Society (AES) has improved carriage of audio on the networks. Liaison with the Advanced Media Workflow Association (AMWA) has resulted in adoption of the Networked Media Open Specifications (NMOS), an open-source set of protocols and associated software for discovery, registration, connection, and management of ST 2110 networks. Liaison with the European Broadcasting Union (EBU) has created user requirements and testing protocols to ensure the interoperability of equipment manufactured to the standards. 

Together, these groups and others from the Joint Taskforce on Network Media (JT-NM), coordinate key efforts in helping the world of broadcasting transition from circuit-switch SDI working to more flexible, multi-purpose IP workflows suitable for delivering content to today's multi-platform, mixed-consumption, IP-savvy consumers.

The SMPTE ST 2110 standards suites specifies the carriage, synchronization, and description of separate elementary essence streams over IP for real-time production, playout, and other professional media applications. Each stream is individually timed by the ST 2110 system and can take different routes over the networked fabric to arrive via unicast or multicast at one or more receivers. The audio-video-data synchronization using PTP clocks ensures that the accurate synchronization of all streams regardless of how the packets were routed.

The SMPTE ST 2110 Professional Media Over Managed IP Networks suite of standards is a major contribution factor in the movement towards one common internet protocol (IP) based mechanism for the professional media industries.

2025 Emmy® Engineering Winner Graphic

SMPTE, the European Broadcasting Union (EBU), and VSF - The Video Services Forum won the 2025 Emmy® for Outstanding Achievement in Engineering, Science & Technology for the development of SMPTE ST 2110, awarded at the Television Academy's 77th Engineering, Science & Technology Emmy® Awards!

To access a standard listed below, click the Access Document button for the published standard or if available, the GitHub button to comment on the repository issue tracker.

Standards

OV 2110-0:2018

Professional Media over Managed IP Networks — Roadmap for the 2110 Document Suite
The SMPTE 2110 suite of documents defines an extensible system of RTP-based essence streams referenced to a common reference clock, in a manner which specifies their timing relationships. This informative “roadmap” describes the documents in the SMPTE 2110 suite.

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GitHub

ST 2110-10:2022

Professional Media Over Managed IP Networks — System Timing and Definitions
This family of engineering documents defines an extensible system of RTP-based essence streams referenced to a common reference clock, in a manner which specifies their timing relationships. — This standard specifies the system timing model and the requirements common to of all of the essence streams.

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GitHub

ST 2110-20:2022

Professional Media Over Managed IP Networks — Uncompressed Active Video
The real-time, RTP-based transport of uncompressed active video essence over IP networks. An SDP-based signaling method is defined for image technical metadata necessary to receive and interpret the stream.

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ST 2110-21:2022

Professional Media Over Managed IP Networks — Traffic Shaping and Delivery Timing for Video
A timing model for SMPTE ST 2110-10 video RTP streams as measured leaving the RTP sender, and defines the sender SDP parameters used to signal the timing properties of such streams.

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ST 2110-22:2022

Professional Media Over Managed IP Networks — Constant Bit-Rate Compressed Video
The real-time, RTP-based transport of constant bit-rate compressed video over IP networks, referenced to a common reference clock.

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RP 2110-23:2019

Professional Media Over Managed IP Networks — Single Video Essence Transport over Multiple ST 2110-20 Streams
Proposed methodology to (i) split high bandwidth single video essence streams into several lower bandwidth SMPTE ST 2110-20 tributary streams, and (ii) to describe the appropriate grouping and signaling of these multiple SMPTE ST 2110-20 streams (SDP declarations, addressing conventions, RTP time stamp constraints, etc.).

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GitHub

RP 2110-24:2023

Special Considerations for Standard Definition Video Using SMPTE ST 2110-20
This Recommended Practice specifies a relationship between the Sample Rows of SMPTE ST 2110-20 signals and the line numbering of SMPTE ST 125:2013. It also provides guidance on values for certain Media Type Parameters.

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RP 2110-25:2023

Professional Media over Managed IP Networks — Measurement Practices
This Recommended Practice:

  • Specifies recommended nomenclature for measurements on SMPTE 2110 systems, together with their associated formulae for consistency in implementation and reporting of measurements.
  • Describes some possible methods for implementing the ST 2110-21 buffer measurements. For these methods their characteristics and differences are described along with ways to report the results so that users understand the differences.

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ST 2110-30:2025

Professional Media Over Managed IP Networks — PCM Digital Audio
The real-time, RTP-based transport of PCM digital audio streams over IP networks by reference to AES67. An SDP-based signaling method is defined for metadata necessary to receive and interpret the stream. Non-PCM digital audio signals including compressed audio signals are outside the scope of this standard.

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GitHub

ST 2110-31:2022

Professional Media Over Managed IP Networks — AES3 Transparent Transport
The real-time, RTP-based transport of AES3 signals over IP networks, referenced to a network reference clock.

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ST 2110-40:2023

Professional Media Over Managed IP Networks — SMPTE ST 291-1 Ancillary Data
The real-time, RTP payload-based transport of SMPTE ST 291-1 Ancillary (ANC) Data packets related to digital video data streams, over IP networks, referenced to a common reference clock.

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ST 2110-41:2024

Professional Media over Managed IP Networks — Fast Metadata Framework
This Standard defines a flexible RTP payload framework for data items. The framework can be used to transport data items which are tightly time-associated with video or audio RTP Streams, or those that are independent of any video or audio RTP streams. This framework defines a base RTP payload format, SDP signaling conventions, and an optional object segmentation method.

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ST 2110-43:2021

Professional Media Over Managed IP Networks — Timed Text Markup Language for Captions and Subtitles
The real-time, RTP-based transport of Timed Text Markup Language for captions and subtitles in systems conforming to SMPTE ST 2110-10.

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Virtual Courses

Understanding ST 2110

If you’re an Engineer or Technician in Broadcasting, Systems Design or Integration, you’ll raise your value in the workplace with a strong grasp of ST 2110. This 8-week course helps you develop the in-depth knowledge you’ll need to ensure interoperability between all ST 2110 compliant equipment, with a strong emphasis on the practical skills you’ll apply every day in the field. You’ll learn how to:

  • Understand video/audio/data encapsulation, identification and synchronization, traffic shaping, and packet delivery timing for real-time production and playout.
  • Recognize the difference between SDI and IP based Media Transport
  • Determine network requirements and limitations
  • Avoid the pitfalls in systems design, where bottlenecks are created with bad configurations
  • Learn how to go deeper into the standard for your specific issues

Webcasts

Networking Fundamentals for ST 2110 and Internet Streaming

Building Large SMPTE ST 2110 Systems Using JT-NM TR-1001-1

Exploring the Role of NMOS: Discovery and Connection in an IP World

SMPTE ST 2110 – Professional Media over IP Networks