Automated Lecture Transcription at OCW Consortium Global Meeting 2009

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Introduction and background to the automated lecture transcription/lecture transcription service project by MIT's Office of Educational Innovation and Technology (OEIT). Presented by Brandon Muramatsu at the OCW Consortium Global Meeting in Monterrey Mexico, April 22, 2009.

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Automated Lecture Transcription at OCW Consortium Global Meeting 2009

  1. 1. Automated Lecture Transcription Brandon Muramatsu [email_address] MIT, Office of Educational Innovation and Technology (Really, I’m just moonlighting as an OCWC Staffer…) Citation: Muramatsu, B. (2009). Automated Lecture Transcription. Presented at the OpenCourseWare Global Meeting. Monterrey, Mexico. April 22, 2009.
  2. 2. Motivation <ul><li>More & more academic videos on the Web </li></ul><ul><ul><li>Universities recording lectures </li></ul></ul><ul><ul><li>Cultural organizations interviewing experts </li></ul></ul>MIT OCW 8.01 : Professor Lewin puts his life on the line in Lecture 11 by demonstrating his faith in the Conservation of Mechanical Energy.
  3. 3. Motivation <ul><li>Challenges </li></ul><ul><ul><li>Volume </li></ul></ul><ul><ul><li>Search </li></ul></ul><ul><ul><li>Accessibility </li></ul></ul>
  4. 4. Research: Spoken Lecture Project <ul><li>Speech recognition & automated transcription of lectures </li></ul><ul><li>Why lectures? </li></ul><ul><ul><li>Conversational, spontaneous, starts/stops </li></ul></ul><ul><ul><li>Different from broadcast news, other types of speech recognition </li></ul></ul><ul><ul><li>Specialized vocabularies </li></ul></ul>James Glass [email_address]
  5. 5. Research: Spoken Lecture Project <ul><li>Processor, browser, workflow </li></ul><ul><ul><li>web.sls.csail.mit.edu/lectures/ </li></ul></ul><ul><li>Prototyped with lecture & seminar video </li></ul><ul><ul><li>MIT OCW (~300 hours, lectures) </li></ul></ul><ul><ul><li>MIT World (~80 hours, seminar speakers) </li></ul></ul><ul><li>Supported with iCampus MIT/Microsoft Alliance funding </li></ul>James Glass [email_address]
  6. 6. What problems are we trying to solve? For Learners? For Content Producers? <ul><li>Finding…(primary) </li></ul><ul><ul><li>Content in videos (text metadata) </li></ul></ul><ul><ul><li>Specific “phrase” in video (via transcript) </li></ul></ul><ul><ul><li>Specific “concept” in video </li></ul></ul><ul><li>Facilitating…(secondary) </li></ul><ul><ul><li>Accessibility (closed captioning) </li></ul></ul><ul><ul><li>Translations </li></ul></ul>
  7. 7. Transition: Towards a Lecture Transcription Service <ul><li>Develop a prototype production service </li></ul><ul><ul><li>MIT, University of Queensland </li></ul></ul><ul><ul><li>Engage external partners (hosted service?, community?) </li></ul></ul><ul><li>Requirements gathering </li></ul><ul><ul><li>Internal MIT customers (OCW, AMPS) </li></ul></ul><ul><ul><li>External (OpenCast, UC Berkeley, Others) </li></ul></ul>
  8. 8. MIT Projects/Customers <ul><li>OpenCourseWare </li></ul><ul><ul><li>(Production support) </li></ul></ul><ul><ul><li>Existing videos & audio, new video </li></ul></ul><ul><ul><li>Lecture notes, slides, etc. for domain model </li></ul></ul><ul><ul><li>Multiple videos/audio by same lecturer for speaker model </li></ul></ul><ul><ul><li>Diverse topics/disciplines </li></ul></ul><ul><ul><li>Improve search and retrieval (more granularity) </li></ul></ul><ul><ul><li>English transcripts can facilitate translation </li></ul></ul><ul><li>MIT 150 th Celebration (AMPS) </li></ul><ul><ul><li>Highly produced, individual speakers </li></ul></ul><ul><ul><li>Full transcripts available </li></ul></ul><ul><ul><li>Facilitate search </li></ul></ul>
  9. 9. External Customers/Interest <ul><li>University of Queensland </li></ul><ul><ul><li>Lecture podcasting </li></ul></ul><ul><ul><li>25 years of interviews with world-class scientists, Australian Broadcasting Company </li></ul></ul><ul><li>UC Berkeley </li></ul><ul><ul><li>Lecture podcasting, 500+ hours of new content per term </li></ul></ul><ul><ul><li>Improve search and retrieval </li></ul></ul><ul><li>OpenCast Project ( www.opencast.org ) </li></ul><ul><ul><li>Extend generic podcast production workflow </li></ul></ul><ul><li>Harvard University Extension </li></ul><ul><ul><li>100 th Anniversary </li></ul></ul>
  10. 10. Lecture Transcription Workflow
  11. 11. Demo <ul><li>Spoken Lecture Browser </li></ul><ul><ul><li>web.sls.csail.mit.edu/lectures </li></ul></ul><ul><ul><li>Requires Real Player 10 </li></ul></ul><ul><li>Alternate UI, Google Audio Indexing </li></ul><ul><ul><li>labs.google.com/gaudi </li></ul></ul><ul><ul><li>U.S. political coverage (2008 elections, CSPAN) </li></ul></ul>
  12. 12. Spoken Lecture Browser <ul><ul><li>web.sls.csail.mit.edu/lectures </li></ul></ul>
  13. 13. A Lecture Transcription Service? <ul><li>Under consideration </li></ul><ul><li>Limitations (anticipated, may change) </li></ul><ul><ul><li>Lecture-style content (technology optimized) </li></ul></ul><ul><ul><li>Approximately 80% accuracy </li></ul></ul><ul><ul><li>Probably NOT full accessibility solution </li></ul></ul><ul><ul><li>Other languages? (not sure) </li></ul></ul><ul><ul><li>Browser open-sourced (expected) </li></ul></ul><ul><ul><li>Processing hosted/limited to MIT (current thinking) </li></ul></ul><ul><ul><ul><li>So will submit jobs via MIT-run service </li></ul></ul></ul><ul><ul><li>Audio extract, domain models and transcripts available donated for further research </li></ul></ul>
  14. 14. Thanks! Brandon Muramatsu [email_address] MIT, Office of Educational Innovation and Technology Citation: Muramatsu, B. (2009). Automated Lecture Transcription. Presented at the OpenCourseWare Global Meeting. Monterrey, Mexico. April 22, 2009.

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