A handheld English pronunciation evaluation device

A handheld device for practicing English pronunciation is developed by applying speech recognition technology. This machine helps correct the intonation by showing the pitch contour and assesses the pronunciation accuracy by computing the log-posterior probability of the segmented phonemes. Not only the phoneme replacement errors but also deletion and insertion mistakes are checked. It is also possible to find out the Korean phoneme replacement errors because this algorithm employs both English and Korean phoneme sets. This handheld device is implemented using an ARM7 CPU and equips a graphic LCD.