BULBasaa: A Bilingual Basaa-French Speech Corpus for the Evaluation of Language Documentation Tools
Fatima Hamlaoui, Emmanuel-Moselly Makasso, Markus Müller, Jonas Engelmann, Gilles Adda, Alexander H. Waibel, Sebastian Stüker · 2018
Bàsàá is one of the three Bantu languages of BULB (Breaking the Unwritten Language Barrier), a project whose aim is to provide NLP-based tools to support linguists in documenting under-resourced and unwritten languages.To develop technologies such as automatic phone transcription or machine translation, a massive amount of speech data is needed.Approximately 50 hours of Bàsàá speech were thus collected and then carefully re-spoken and orally translated into French in a controlled environment by a few bilingual speakers.For a subset of ≈10 hours of the corpus, each utterance was additionally phonetically transcribed to establish a golden standard for the output of our NLP tools.The experiments described in this paper are meant to provide an automatic phonetic transcription using a set of derived phone-like units.As every language features a specific set of idiosyncrasies, automating the process of phonetic unit discovery in its entirety is a challenging task.Within BULB, we envision a workflow where linguists are able to refine the set of automatically discovered units and the system is then able to re-iterate on the data, providing a better approximation of the actual phone set.