An Open, Standards Based Framework for Audio Metadata Transport in Live Content Workflows

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Conference Paper
Content Type: Original Research
Volume: 2017, No. 10, pp. 1–16
Abstract: Described is a model for open audio metadata transport in live workflows that will meet the requirements for next generation audio systems such as ATSC 3.0. The framework is standards based and essence agnostic. The format groups audio metadata into logical payloads that can be customized for specific use cases. It allows for bit efficient coding of audio metadata, but also allows for full, structured syntaxes, including XML based syntaxes. The format is also not tied to a specific metadata standard. Current audio metadata standards are supported, but the format is open to support new audio formats as they arise, as well as private and/or non-standard metadata. — Realization of the framework using KLV for the base structure of the format is proposed. ST 2109 targets applications for transport in AES3 streams, for operation with existing SDI and AES3 based infrastructures. Methods for transport over IP are proposed including native KLV transport using RTP over IP, which can be utilized by ST 2110 media flows. — While targeted at live production and distribution, the format takes into consideration metadata paths for emission to enable a seamless “microphone to speaker” metadata path for efficient delivery of audio metadata from content creator to the end user. Interoperation with file based formats and workflows is also considered in the design.
Publication Date: 2017-10-23
DOI: 10.5594/M001799
ISBN: Print: 978-1-61482-959-1
Link: https://doi.org/10.5594/M001799
Author(s): Kent TerryDolby Laboratories Inc, 1275 Market St. San Francisco CA 94103
Keyword(s): Audio, Metadata, ATSC 3.0, Key-length-value (KLV), Object-based Audio, Immersive Audio, Live Production, Audio Over IP
Copyright: © 2017 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

Immersive and Personalized Audio: A Practical System for Enabling Interchange, Distribution, and Delivery of Next-Generation Audio Experiences [Active]
AES41-1.2012 — Audio Engineering Society (AES), AES41-1-2012, “AES Standard for Digital Audio—Audio-Embedded Metadata— Part 1: General.” EXTERNAL
AES67.2015 — Audio Engineering Society (AES), AES67-2015, “AES Standard for Audio Applications of Networks–High-performance Streaming Audio-over-IP Interoperability.” EXTERNAL
ETSI.TS-103-190-1 — European Telecommunications Standards Institute (ETSI), TS 103 190-1 V1.2.1, “Digital Audio Compression (AC-4) Standard,” Section 4.3.15. EXTERNAL
EMDF-RA.org: http://www.emdf-ra.org EXTERNAL
ST 2022-2:2007, “Unidirectional Transport of Constant Bit Rate MPEG-2 Transport Streams on IP Networks” EXTERNAL
ST 2022-6:2012, “Transport of High Bit Rate Media Signals over IP Networks (HBRMT)” EXTERNAL
ST 2035:2009, “Audio Channel Assignments for Digital Television Recorders (DTRs)” EXTERNAL
R-REC-BS.1738-1 — International Telecommunication Union-Radiocommunication (ITU-R), Recommendation BS.1738-1, “Identification and Ordering of 4 and 8 Track Audio Channels Carried on International Contribution Circuits,” International Telecommunications Union, Oct. 2015. EXTERNAL
IETF RFC 6597 [Active*]
SMPTE RDD 6:2008 [Active*]
SMPTE RDD 33:2015 [Active]
SMPTE ST 336:2007 [Superseded]
SMPTE ST 337:2015 [Active, Stabilized]
SMPTE ST 355:2001 [Active, Stabilized]
SMPTE ST 2020-1:2014 [Active, Stabilized]

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Kent Terry; An Open, Standards Based Framework for Audio Metadata Transport in Live Content Workflows, SMPTE Meetings and Conferences ( October 2017); SMPTE, 2017, ISBN: 978-1-61482-959-1. Available at https://doi.org/10.5594/M001799

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Kent Terry; An Open, Standards Based Framework for Audio Metadata Transport in Live Content Workflows, SMPTE Meetings and Conferences ( October 2017); SMPTE, 2017, ISBN: 978-1-61482-959-1. Available at https://doi.org/10.5594/M001799

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<span class="citation">Kent Terry; <cite>An Open, Standards Based Framework for Audio Metadata Transport in Live Content Workflows</cite>, SMPTE Meetings and Conferences ( October 2017); SMPTE, 2017, ISBN: 978-1-61482-959-1. Available at <a href="https://doi.org/10.5594/M001799" target="_blank" rel="noopener">https://doi.org/10.5594/M001799</a></span>

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Kent Terry; <cite id="bib-10-5594-m001799">An Open, Standards Based Framework for Audio Metadata Transport in Live Content Workflows</cite>, SMPTE Meetings and Conferences ( October 2017); SMPTE, 2017, ISBN: 978-1-61482-959-1
<span class="doi">10.5594/M001799</span>
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