Ariane Lazaridès

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In the last few years, the power and simplicity of classification trees as acoustic modeling tools have gained them much popularity. In [1], we studied ''tree units'', which cluster parameters at the HMM level. Building on this earlier work, we examine some new variants of Young et al's ''tree states'', which cluster parameters at the state level [2]. We(More)
Recently, we described a two-step self-learning approach for grapheme-to-phoneme (G2P) conversion [1]. In the first step, grapheme and phoneme strings in the training data are aligned via an iterative Viterbi procedure that may insert graphemic and phonemic nulls where required. In the second step, a Trie structure encoding pronunciation rules is generated.(More)
This paper describes decision tree methodology and shows how it has been adapted to three diierent problems in speech recognition and understanding at CRIM and at FORWISS. The three problems are: 1. Development of context-dependent phone models (work carried out by CRIM researchers and partly inspired by FORWISS work on polyphones). Here, decision trees(More)
In this longitudinal study, we examined the moderating role of personality in the relationship between communication behaviors (withdrawal, dominance, criticism, support, and problem solving) and couple stability. At Time 1, 135 couples completed the NEO Five-Factor Inventory and the Dyadic Adjustment Scale. These couples were also videotaped during a(More)
we had just found another way to ask the same thing, with, of course, the same results. We did this experiment on ATIS only and did not bother trying it on WSJ. Picking the questions for each node the way we do (by comparing the impurity of a node with that of its children) is a local optimization of the performance of the tree. It seems plausible that if(More)
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