Serving Diverse Audiences More Effective with Auxiliary Image Sequences in IMF
Gillian Reston, Ulrich du Bosque, Rowan de Pomerai, Dan Tatut, Tim Davis, Andrew Dunne
This paper describes an auxiliary image sequence plug-in that enhances SMPTE ST 2067 and SMPTE TSP 2121 suite of documents to enable compositing workflows using the Interoperable Master Format (IMF). Our primary use case for the auxiliary image sequence is the management of sign-interpreted programming. This currently necessitates the creation of a new full-length master for each version created. Instead, it is proposed that the video of the sign interpreter will be stored as a separate component. This will allow the implementer to be composited with the main program when required. A working prototype of a simple compositing process has been developed by the DPP in collaboration with its member companies. Opportunities for more complex and dynamic compositing via output profile list (OPL) and time-variant metadata are also discussed in this paper, along with other use cases for the functionality described. The plug-in described in this paper benefits the implementer throughout the IMF lifecycle by enabling storage, editing, repositioning, and processing of the auxiliary image sequence before compositing.
Print ISSN
1545-0279
Electronic ISSN
2160-2492
Published
2020-11
Content type
Original Research
Keywords
Accessibility, access services, auxiliary sequence, AuxImageSequence, composition, dynamic compositing, hard of hearing, implementation, Interoperable Master Format (IMF), multilayered, plug-in, sign language, signed services, static compositing, 2067, virtual track