Captioning Digital Media at Captioning Digital Media at Eastern Illinois UniversityEastern Illinois University

Daniel P. Harvey II

September 29, 2009

Illinois Web Accessibility Conference

StrategyStrategy

• Distribute task of transcription • Make transcription process as simple and as low-tech as possible. • Encourage clients to provide transcript via policy

• Automate process where feasible• Scan audio and measure pauses• Workflow 1: transcript available• Workflow 2: transcript not available

• Marketing• Educate clients about media accessibility• Use captioning data to create a web-based searchable media library

Policies and ProceduresPolicies and Procedures

• Developed a Media Production Guide

• Created a Captioning Request Form

• The software chosen for producing captioned media is Inqscribe for transcription and MAC Caption for time code synchronization.

PersonnelPersonnel

• CATS hired and trained a part-time person to do transcribing and time coding.

• Hiring work-study students to perform transcribing.

Automated Alignment with TranscriptAutomated Alignment with Transcript

Automated Alignment with TranscriptAutomated Alignment with Transcript

Automated Alignment with TranscriptAutomated Alignment with Transcript

Automated Alignment with TranscriptAutomated Alignment with Transcript

Automated Alignment with TranscriptAutomated Alignment with Transcript

Automated Alignment with TranscriptAutomated Alignment with Transcript

Automated Alignment with TranscriptAutomated Alignment with Transcript

ResultsResults

• Timing of 96% of the captions was estimated within 0.5 sec

• High level of automation achieved

• Current process effective for scripted/formal speech

Automated Segmentation of AudioAutomated Segmentation of Audio

Automated Segmentation of AudioAutomated Segmentation of Audio

Automated Segmentation of Audio

Searchable Media LibrarySearchable Media Library

Searchable Media LibrarySearchable Media Library

Searchable Media Library

Searchable Media LibrarySearchable Media Library

Searchable Media Library

Future WorkFuture Work

• Research: incorporate additional audio data

• Zero Crossing Rate primary candidate in time domain

• Wavelet Analysis to match certain phonemes to text

• Development

• Enhance usability of web interfaces; include more audio data in adjusting segments for no transcript workflow

Questions?Questions?

Comments?Comments?

dpharvey@eiu.edudpharvey@eiu.edu