This paper presents a stochastic model of intonation contours for use in text-to-speech s. The model has two modules, a linguistic module that generates abstract prosodic rom text, and a phonetic module that generates an F0 curve from the abstract prosodic This model differs from previous work in the abstract prosodic labels used, which can be automatically derived from the training corpus. This feature makes it possible to use large 1 This paper is based on a communication presented at Eurospeech'97 (Véronis et al. 1997) and has been recommended by the Editorial Board of Speech Communication.