Measuring the gap between HMM-based ASR and TTS

J. Dines, J. Yamagishi, S. King

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

The EMIME European project is conducting research in the development of technologies for mobile, personalised speech-to-speech translation systems. The hidden Markov model is being used as the underlying technology in both automatic speech recognition (ASR) and text-to-speech synthesis (TTS) components, thus, the investigation of unified statistical modelling approaches has become an implicit goal of our research. As one of the first steps towards this goal, we have been investigating commonalities and differences between HMM-based ASR and TTS. In this paper we present results and analysis of a series of experiments that have been conducted on English ASR and TTS systems, measuring their performance with respect to phone set and lexicon, acoustic feature type and dimensionality and HMM topology. Our results show that, although the fundamental statistical model may be essentially the same, optimal ASR and TTS performance often demands diametrically opposed system designs. This represents a major challenge to be addressed in the investigation of such unified modelling approaches.
Original languageEnglish
Title of host publicationInterspeech 2009
Subtitle of host publication10th Annual Conference of the International Speech Communication Association
PublisherInternational Speech Communication Association
Number of pages4
ISBN (Print)1990-9772
Publication statusPublished - 1 Sept 2009


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