This paper describes a perceptual study on approximated Cantonese tone contours. We believe that the perception of tone contours relies mainly on the major trend of pitch movement, and is not sensitive to the exact F0 values at particular time instants. The tone contours of individual syllables and the transition between them are approximated as a small number of linear movements. The effect of such approximation is assessed by perceptual experiments. It is found that the six Cantonese tones can be represented by one or two linear movements, and the transition between tones can be represented by a single linear movement, without creating noticeable perceptual difference. Such simple approximations are desirable for perception-driven F0 modeling for text-to-speech applications.
Bibliographic reference. Li, Yujia / Lee, Tan (2007): "Perceptual equivalence of approximated Cantonese tone contours", In INTERSPEECH-2007, 2677-2680.