SMPTE 2110

SMPTE 2110 is a suite of standards from the Society of Motion Picture and Television Engineers (SMPTE) that describes how to send digital media over an IP network.[1]

SMPTE 2110 is intended to be used within broadcast production and distribution facilities where quality and flexibility are more important than bandwidth efficiency.[2]

SMPTE 2110 is specified in several parts:[3]

  • ST 2110-10 - System architecture and synchronization: essences, RTP, SIP and PTP.
  • ST 2110-20 - Uncompressed video transport, based on SMPTE 2022-6
  • ST 2110-21 - Traffic shaping and network delivery timing
  • ST 2110-30 - Audio transport, based on AES67[4]
  • ST 2110-31 - Transport of AES3 formatted audio
  • ST 2110-40 - Transport of ancillary data

History

SMPTE 2110 was based on the TR-03[5] and TR-04[6] work published by the Video Services Forum on 12 November 2015. The first four parts of SMPTE 2110, -10, -20, -21 and -30, were published by SMPTE on 27 November 2017.

ST 2110-10: System architecture and synchronization

There are several important features of ST 2110-10: [7]

  • Individual audio, video and ancillary data tracks or clips are carried as separate individual streams. These streams are referred to as "essences. A 5.1 JPEG mp4 clip would have 9 essences: a video essence, 6 separate audio essences, and two close caption essences, English and Chinese.
  • Real Time Transport (RTP) is used to transmit streaming essences.
  • Session Initiation Protocol (SIP) is used to manage the connection and distribution of RTP streams including IP multicast one to many distribution.
  • Precision Time Protocol (PTP) provides global micro second accuracy timing of all essences. Synchronization is based on SMPTE 2059.

ST 2110-21 Transmission timing

SMPTE 2110-21 defines three classes of devices based on their transmission timing behavior. NL senders transmit at a constant bit rate. N senders may suspend transmission during the vertical blanking interval. W senders are intended to support software implementations of 2110 and adhere to less rigorous transmission timing requirements. A type W receiver should be able to receive from any type of sender.[8]

References
  1. "SMPTE ST 2110: Structuring the Future of Broadcasting". IEEE Spectrum. Retrieved 2019-05-21.
  2. What is SMPTE ST2110?
  3. "SMPTE ST 2110 FAQ". Society of Motion Picture and Television Engineers. Retrieved 2019-05-21.
  4. Wes Simpson (May 31, 2018). "SMPTE ST 2110-30: A Fair Hearing For Audio". TV Technology. Retrieved 2019-05-21.
  5. Transport of Uncompressed Elementary Stream Media over IP (PDF), Video Services Forum, 12 November 2015
  6. Utilization of ST-2022-6 Media Flows within a VSF TR-03 Environment (PDF), Video Services Forum, 12 November 2015
  7. SMPTE ST 2110-10: A Base to Build On
  8. Wes Simpson (February 9, 2018). "SMPTE ST 2110-21: Taming the Torrents". TV Technology.


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