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What is SMPTE ST 2110?

Category: FAQ

Released: 2019-04-10

SMPTE ST 2110 is a standard from the Society of Motion Picture and Television Engineers (SMPTE) that describes how to send digital video over an IP network.

SMPTE ST 2110 permits granular transport of individual separate essence streams supporting video, audio and metadata. As such, unlike ST 2022-6/7, the data is not simple packetization of SDI. ST 2110 incorporates the following in three or more different IP packet streams:

• Audio: Multiple channels of audio may be transmitted in a single packet stream, or split up into different groups of audio channels in different streams.

• Video (from active area)

• Metadata

The different streams of audio/video/metadata are all synchronized with each other using RTP timestamps.

When mapping from an SDI source to SMPTE ST 2110, since the data in the blanking is not implicitly included in the packetized video stream, the only way to transmit ancillary data such as timecode, Closed Captioning, etc. is in the metadata stream. Any data that is not in the metadata stream is NOT transmitted.

There are several parts that comprise SMPTE ST 2110, the parts currently supported by IPR-10G-HDMI are:

• SMPTE ST-2110-10: system timing and synchronization or the standard formerly known as SMPTE ST 2059 parts 1 & 2 (PTP, or Precision Time Protocol).
• SMPTE ST-2110-20: uncompressed video or VSF TR-03 or IETF RFC 4175.
• SMPTE ST-2110-30: uncompressed PCM Digital Audio or AES67.

It’s important to note that each channel of ST-2110-20, ST-2110-30 (and where applicable ST-2110-40) are carried over separate IP streams or essences. AJA’s IPT-10G2-HDMI and IPR-10G2-SDI transmitters take an incoming baseband signal and effectively separates the video, audio, and metadata to be transmitted as separate IP streams along with PTP timing information. AJA’s IPR-10G2-HDMI, IPR-10G2-SDI and IPR-10G-HDMI receive these streams, and they are reassembled and aligned with the timing information provided in each stream essence.  

For more information, please see https://www.smpte.org/st-2110.

Related Product(s): IPR-10G-HDMI