SMPTE publishes standards addition for ancillary metadata over IP networks

2110-40 maps ancillary data packets into Real-Time Transport Protocol packets
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The Society of Motion Picture and Television Engineers has published a standards addition which maps ancillary data into Real-Time Transport Protocol packets and enables them to move synchronously with associated video and audio essence streams.

SMPTE ST 2110-40 joins ST 2110-10, -20 and -30, which address system concerns and uncompressed video and audio, respectively, as well as ST 2110-21, which specifies traffic shaping and delivery timing for uncompressed video.

“This advance is momentous because it means that, thanks to the ST 2110 standards suite, every element that has been part of the traditional SDI studio can now be put into an IP studio,” said SMPTE director of standards development Thomas Bause Mason.

SMPTE ST 2110 provides for carriage and synchronisation of separate audio, video and ancillary data streams for live production, playout and other media uses. 

The organisation said separating the essences makes it easier to add captions, subtitles and Teletext, and to process multiple audio languages. It also makes it possible to carry next-generation image formats, including HDR, which may require metadata.

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