Segment-structure transcript format with boldface labels replacing bracketed nonverbal insertions

Design · All designs
Evidence · no claims cited

Description

The v6m system instructions organize transcripts into distinct verbal and descriptive segments marked by boldface labels rather than square brackets, with both segment types able to contain math. Early tests showed that closing display math at the end of a square-bracketed descriptive segment caused numerous compilation failures; the authors report that "Abandoning square brackets and adopting the segment structure delivered an immediate and substantial improvement in stability and overall performance". The labels also provide a less-ambiguous transition signal for screen reader users than bracketed text.

Design Implications

Context

Requirements

• A prewritten LuaLaTeX preamble compatible with the segment structure
• System instructions that define and enforce the segment labels

Constraints

• Brief bracketed insertions of nonverbal description cannot be injected directly into the verbal flow

Target Learners

• blind and low-vision students using screen readers

Learning Goals

• accessible comprehension of spoken and board-written mathematical content in lecture videos

Claims

• V6M Gemini Lualatex Transcription Workflow [+M]

Related Designs

• Mitigate LLM hallucinations in material generation by drastic context pruning and segmented, section-by-section generation rather than single-prompt deck generation

Examples

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Key Sources

• Looney, C. W., & Duston, C. L. (2026). Using Gemini and LuaLaTeX to transcribe physics videos into PDF/UA-2 and ISO 32005 math-accessible PDFs. doi:10.48550/arxiv.2608.20733

Page metadata

Field	Value
type	design
id	segment-structure-transcript-format
title	Segment-structure transcript format with boldface labels replacing bracketed nonverbal insertions
description	The v6m system instructions organize transcripts into distinct verbal and descriptive segments marked by boldface labels rather than square brackets, with both segment types able to contain math.
status	review
generated	by process:settle-candidates on 2026-10-10
trust	unverified — no one has confirmed this page's content
sources	1 — looney-2026

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