Factors impacting accurately captioned video content

Shaw, Michael (2023) Factors impacting accurately captioned video content. In: Digital Accessibility Conference, 29 June 2023, University of Nottingham.

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Item Type:Conference or Workshop contribution (Presentation)
Item Status:Live Archive


Legislation defining caption accessibility states that automatically generated captions do not meet user needs and captions should be checked and corrected to be ‘verbatim’. Users of any auto-captioning service will have experienced errors, both minor and major, in the accuracy of the automatic transcription, and anecdotal evidence has suggested that some accents and the use of technical/academic language can further hinder the accuracy of the transcription.​

It is evident that automatic captions cannot be relied on to provide a suitable solution, particularly in meeting the ‘verbatim’ component of the WCAG success criteria. It is therefore important to review the accuracy of different automatic voice-to-text services, in order to give an initial transcript which can be manually corrected; considering the ease and time required in the workflow to produce fully accurate captions.​

How much work is required to produce accurate captioning, and are there ways to optimise the workflow? This work set out to review the accuracy of voice-to-text services and their suitability for captioning teaching content and decipher the most influential factors in captioning accuracy. Reviewing a sample of teaching videos including a mix of native/non-native accents, we tested the accuracy of 9 voice-to-text services (including 2 paid services).​

Participants will gain an insight into a range of, and the degree to which, different factors impact caption quality and strategies for developing the accessibility of video/audio based learning resources.​

Keywords:Accessibility, Technology enhanced learning, Pedagogy, Audio
Subjects:X Education > X300 Academic studies in Education
X Education > X142 Training Teachers - Higher Education
Divisions:Lincoln Academy of Learning and Teaching
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ID Code:56045
Deposited On:06 Sep 2023 14:09

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