36 CFR Part 1194 - Proposed Information and Communication Technology (ICT) Standards and Guidelines NPRM - Preamble

412.1.1 Digital Television Tuners (Section-by-Section Analysis)

This section proposes that, where audio description is played through a digital television tuner, that such tuner conform to Part 5 of the ATSC A/53 Digital Television Standard (incorporated by reference in 508 Chapter 1 and 255 Chapter 1). The provision then goes on to require that tuners provide processing for audio description when encoded as a Visually Impaired (VI) associated audio service. This is the industry-wide accepted method for delivery of audio description content and the means to identify audio as a VI associated audio service.