Second International Conference on Spoken Language Processing (ICSLP'92)

Banff, Alberta, Canada
October 13-16, 1992

MEDIATEX-TASF: A Closed Captioning Real-Time Service in French

Raymond Descout (1), Robert Bergeron (1), Bernard Merialdo(2)

(1) Canadian Workplace Automation Research Centre, CWARC - Multimedia Systems, Laval, Quebec, Canada
(2) IBM-France Scientific Center, Language Industry Dept., Fontenay-sous-Bois, France

MEDIATEX-TASF is a recent development undertaken for Canadian Broadcasting Corporation's French network by a joint effort from Canadian Workplace Automation Research Centre and IBM-France Scientific Center. This system generates real-time captions during live broadcast by using an experienced stenotypist who is connected to an automatic computer-based transcription system. Real-time closed captioning for hearing-impaired television viewers has been available in English for 10 years, but until now, none were for French-speaking users.

MEDIATEX-TASF adapts the core technology developed by IBM-France (TASF) to the numerous constraints of live operation for providing high quality captioning. Three major improvements were carried out: adaptation of Grandjean method, introduction of specific dictionaries containing more than 6,000 expressions to complement the basic TASF lexicon and post-processing by 500 rules solving lexical problems as well as verb conjugation and word agreement in gender and number. The error rate of MEDIATEX-TASF is now reaching 5%, which could be sufficient for a commercial usage. First on-the-air tests will occur next September in Montreal.

Full Paper

Bibliographic reference.  Descout, Raymond / Bergeron, Robert / Meriald, Bernard (1992): "MEDIATEX-TASF: a closed captioning real-time service in French", In ICSLP-1992, 1617-1620.