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FROM PHONEME TO GRAPHEME : DIAGNOSIS IN A DICTATION Conception

The main difficulty for the elaboration of a dictation system consists in modeling the errors and the associated explanations provided to the learner. On these bases, an experimental DICTOR system is being developed as an assistant tool to learn French language spelling. DICTOR includes an automatic checking tool based on a stochastic alignment algorithm and French written linguistic knowledge. This paper focus on both aspects. We discuss the spelling learning issues due to the no one-to-one correspondence between the utterance and the written text. Then the principles of the spelling difficulty groups (sdg) and associated explanation rules are presented. Finally, we report a DICTOR observation in a school environment for the French language spelling.