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Networked Media Open Specifications (NMOS) are a group of open-source specifications intended to allow interoperability on the control layer for media devices on an Internet Protocol (IP) infrastructure.[1] NMOS provide discovery, registration and control services for the SMPTE ST 2110 media over IP networks, and other media over IP applications.[2]

History

The NMOS specifications were created by the Advanced Media Workflow Association (AMWA), and are made available under the Apache-2.0 Licence.

The first NMOS specification (IS-04 v1.0.0) was published by AMWA in April 2016.[3] There have been 15 total published releases of the IS-04 NMOS Discovery and Registration Specification, the most recent being v1.3.3 in December 2024.[4][5]

The NMOS Connection Management API (IS-05) was released in October 2017. There have been 6 total published releases of IS-05, the most recent being v1.2.2 in October 2022.[6]

Interface specifications

NMOS Interface Specifications (IS) specify HTTP APIs to support interoperability between systems. There are currently two Interface Specifications deemed critical for the success of ST 2110:[2][7]

  • IS-04 – Discovery and Registration – IS-04 helps devices find each other and announce their capabilities.
  • IS-05 – Connection Management – IS-05 allows the configuration of connections between devices called Senders and Receivers.

There are several other published NMOS Interface Specifications:[8]

  • IS-07 – Event and Tally
  • IS-08 – Audio Channel Mapping
  • IS-09 – Systems Parameters
  • IS-10 – Authorization
  • IS-11 – Stream Compatibility Management
  • IS-12 – Control Protocol
  • IS-14 – Device Configuration

(IS-06 – Network Control – is deprecated as of September 2022.)[9]

Other specifications

As well as Interface Specifications, AMWA publishes Data Specifications, Best Current Practice and Informative Documents to support NMOS.

Work in Progress

The AMWA develops NMOS Specifications in Working Groups that are authorized by the AMWA Board. The Working Groups operate within a specific scope. Work product under development is called Work in Progress. Work in Progress is publicly visible very early in the process.

Recognition & reception

NMOS specifications have been endorsed by several industry organizations, including the European Broadcasting Union, which published a position statement in 2019 urging the accelerated adoption of NMOS.[10] The Joint Task Force on Networked Media (JT-NM) have endorsed NMOS as a key enabling technology for SMPTE ST 2110 environments.[11] Leaders from technology companies like Sony and Nextera Video have spoken on record about their support of NMOS.[12]

See also

References

  1. ^ “Scalability and Performance of the AMWA IS-04 and IS-05 NMOS Specifications for Networked Media”. journal.smpte.org. Archived from the original on 2025-08-17. Retrieved 2025-07-15.
  2. ^ a b Bridge, The Broadcast (2018-08-13). “AMWA, NMOS and open standards – The Broadcast Bridge – Connecting IT to Broadcast”. www.thebroadcastbridge.com. Archived from the original on 2025-08-18. Retrieved 2025-07-15.
  3. ^ “Releases · AMWA-TV/is-04”. GitHub. Archived from the original on 2025-08-18. Retrieved 2025-07-15.
  4. ^ “Release AMWA IS-04 NMOS Discovery and Registration Specification v1.3.3 · AMWA-TV/is-04”. GitHub. Retrieved 2025-07-15.
  5. ^ “is-04”. is-04. Retrieved 2025-07-15.
  6. ^ “Releases · AMWA-TV/is-05”. GitHub. Archived from the original on 2025-08-16. Retrieved 2025-07-15.
  7. ^ Bridge, The Broadcast (2024-03-01). “Standards: Appendix N – AMWA NMOS Documents – The Broadcast Bridge – Connecting IT to Broadcast”. www.thebroadcastbridge.com. Archived from the original on 2025-07-17. Retrieved 2025-07-15.
  8. ^ “nmos”. nmos. Archived from the original on 2025-05-19. Retrieved 2025-07-15.
  9. ^ “Deprecate specification by peterbrightwell · Pull Request #80 · AMWA-TV/is-06”. GitHub. Archived from the original on 2025-08-16. Retrieved 2025-07-15.
  10. ^ Strategy for the adoption of an NMOS open discovery & connection protocol. 2019-04-02. Archived from the original on 2025-08-18. Retrieved 2025-07-15.
  11. ^ “JT-NM Tested”. JT-NM. Archived from the original on 2025-07-07. Retrieved 2025-07-15.
  12. ^ David Davies (2024-05-06). “Brainstorming NMOS: Collaborating for the Common Good”. TV Tech. Retrieved 2025-07-15.