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The specifications below belong to the series 'saur'
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This document summarizes relevant research, then outlines accessibility-related user needs and associated requirements for the synchronization of audio and visual media. The scope of the discussion includes synchronization of accessibility-related components of multimedia, such as captions, sign language interpretation, and descriptions. The requirements identified herein are applicable to multimedia content in general, as well as real-time communication applications and media occurring in immersive environments.