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Web accessibility ·
Captions (Live) (SC 1.2.4): Determining Live-Broadcast Applicability and Checking On-Screen Synchronization
Determine whether real-time media qualifies as live under the normative definition, and compare the original audio’s dialogue, speakers, and important sounds with the timing of captions displayed on the viewer’s screen. This chapter provides a checklist that reviews server generation logs separately from actual screen records, along with procedures for running AI evaluation prompts.
Web accessibility ·
Conveying On-Screen Information Too: Audio Description and Media Alternatives (WCAG 1.2.3)
Explains how to convey the visual and audio information in prerecorded video equivalently. Provides a WCAG 1.2.3 evaluation prompt based on the differences between captions, transcripts, and audio description, the exception for media alternatives for text, and actual verification results.
Web accessibility ·
Prerecorded Captions: Conveying Dialogue and Important Sounds Together
Understand how captions for prerecorded video should convey dialogue, important sounds, speakers, and timing relationships. An AI evaluation prompt that compares independent transcripts, caption cues, and display records helps document decisions, evidence, corrections, and retesting items.
Web accessibility ·
Recorded Audio and Silent Video: Getting the Same Information Through Different Paths
Distinguish the alternatives needed for prerecorded audio and silent video, and check whether transcripts, step-by-step descriptions, and audio descriptions convey the same information as the originals. Learn the applicability conditions and exceptions, and use an evaluation prompt to organize the materials, time ranges, and evidence provided to multimodal AI.
Web accessibility ·
Alternative Text: Conveying What an Image Does
Design text alternatives around the information and functional purpose conveyed by non-text content. Learn how to compare images, the DOM, the accessibility tree, and page context, then use a multimodal AI evaluation prompt to record evidence, fixes, and retest items.