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Summary:
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Sign languages primarily serve as a means of communication, empowering deaf or hard of hearing individuals by facilitating expressive dialogue within a community of sign language speakers.
Just as there is no one oral or written language, there is no one signed language. This document provides guidance that can be applied to any signed language. Signed languages are fully-fledged natural languages with their own complex structures that are distinct from spoken languages. As natural languages, any individual sign language can be used to provide a linguistic equivalence of another spoken, written, or signed language.
Sign languages are used to enable access to auditory information by deaf and hard of hearing sign language speakers. This document provides requirements and recommendations on the production and display of the visual presentation of audio information in a signed modality. This supports users who are fluent in a sign language regardless of whether they can make use of the information in audio content.
The use of this document helps to support universal and inclusive media content production practices. It provides guidance for producers, exhibitors, or distributors of audio information (including the medium of distribution and the medium of delivery) to support the accessibility and usability of visual alternatives of audio information in a sign language.
Providing visual presentations of audio information in sign languages presents issues that are unique to the signed modality. However, they are beneficial to all, particularly diverse users who cannot hear or understand the information presented in audio content in diverse contexts but can understand one or more sign languages.
Although this guidance acknowledges the need of visual presentations of audio information to provide non-visual presentations for diverse users, it does not include guidance for producing non-visual presentations, such as spoken captions/subtitles (see ISO/IEC TS 20071-25 for further reference) and tactile displays (e.g. braille, tactile signing). For guidance on the general use of visual presentations of audio information, including text-based methods such as captions and subtitles, see ISO/IEC 20071-23. The production, delivery, and exhibition of visual presentations of audio information based on this standard are not intended to interfere with or change the audio information.
This document was developed jointly by ISO/IEC JTC1 SC35 and ITU-T Study Group 21 as a technically-aligned text ISO/IEC 20071-24 | ITU-T F.ACC-AVSL.
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