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IMF is closely related to [[Digital Cinema Package]] (“DCP”), leveraging several of the same standards for packaging and architecture.
== Architecture ==
The core of IMF is the Composition, illustrated in the first image, which consists of a single Composition Playlist and a collection of Track Files. Each Composition corresponds to a single audio-visual master.
[[File:IMF Composition (CPL) Example.png|alt=An IMF Composition is defined by a Composition Play List|thumb|IMF Composition Example]]
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Each Composition represents a different version of an audio-visual work. Separating the Composition Playlist from the Track Files allows reuse of Track Files across multiple Compositions, as shown in the reuse example diagram. [[File:IMF Track File Re-use Example.svg|alt=IMF can re-use Track Files to minimize resource usage for versions of audio-viual works.|thumb|IMF Track File Reuse]]
== Specifications ==
IMF is specified in the ST 2067 family of standards managed by [[Society of Motion Picture and Television Engineers|SMPTE]].<ref name=":0" />
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The core constraints are specified in SMPTE ST 2067-2 (Core Constraints).<ref name=":1">{{Cite journal |date=May 2020 |title=ST 2067-2:2020 - SMPTE Standard - Interoperable Master Format — Core Constraints |url=https://ieeexplore.ieee.org/document/9097478/ |journal=ST 2067-2:2020 |pages=1–43 |doi=10.5594/SMPTE.ST2067-2.2020}}</ref> An example of an application is Application #2E, which is specified in SMPTE ST 2067-21<ref name=":2">{{Cite journal |date=May 2020 |title=ST 2067-21:2020 - SMPTE Standard - Interoperable Master Format — Application #2E |url=https://ieeexplore.ieee.org/document/9097487/ |journal=ST 2067-21:2021 |pages=1–34 |doi=10.5594/SMPTE.ST2067-21.2020}}</ref> and targets studio masters. One of the plugins is the Immersive Audio Bitstream Level 0 Plug-in, which is specified in SMPTE ST 2067-201<ref>{{Cite journal |date=January 2021 |title=ST 2067-201:2021 - SMPTE Standard - Immersive Audio Bitstream Level 0 Plug-in |url=https://ieeexplore.ieee.org/document/9343937/ |journal=ST 2067-201:2021 |pages=1–14 |doi=10.5594/SMPTE.ST2067-201.2021}}</ref> and adds support for immersive sound.
== Example uses ==
IMF is specified by professional content creators for delivery of their content, including: BBC,<ref>{{Cite web |title=TechnicalDeliveryStandardsBBCUHDiPlayerSupplement.pdf |url=https://www.dropbox.com/s/tkvwxksgy3izpca/TechnicalDeliveryStandardsBBCUHDiPlayerSupplement.pdf?dl=0 |access-date=2022-03-04 |website=Dropbox |language=en}}</ref> Netflix<ref>{{Cite web |title=Netflix Branded Delivery Specifications v4.1 |url=https://partnerhelp.netflixstudios.com/hc/en-us/articles/214806618-Netflix-Branded-Delivery-Specifications-v4-1 |access-date=2022-03-04 |website=Netflix {{!}} Partner Help Center |language=en-US}}</ref> and Disney<ref>{{Cite web |date=2021-04-27 |title=Disney Media Tech Specs |url=https://mediatechspecs.disney.com/#/mastering/video/imf-master-packages |access-date=2022-03-04 |website=mediatechspecs.disney.com}}</ref>
In partnership with SMPTE, the DPP has published recommendations for broadcast workflows with IMF<ref>{{Cite web |title=DPP and SMPTE publish major updates to IMF documentation |url=https://www.thedpp.com/news/dpp-and-smpte-publish-major-updates-to-imf-specification |access-date=2022-09-02 |website=The DPP |language=en-GB}}</ref>
== Supported essence ==
IMF supports a wide range of audio-visual essence and metadata, including:
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