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In a regression study of conversational speech, we show that frequency, contextual predictability , and repetition have separate contributions to word duration, despite their substantial correlations. We also found that content-and function-word durations are affected differently by their frequency and predictability. Content words are shorter when more(More)
To date, studies of deceptive speech have largely been confined to descriptive studies and observations from subjects, researchers , or practitioners, with few empirical studies of the specific lexical or acoustic/prosodic features which may characterize deceptive speech. We present results from a study seeking to distinguish deceptive from non-deceptive(More)
To build a robust pitch accent prediction system, we need to understand the effects of speech genre and speaker variation. This paper reports our studies on genre and speaker variation in pitch accent placement and their effects on automatic pitch accent prediction. We find some interesting accentuation pattern differences that can be attributed to speech(More)
Identification of action items in meeting recordings can provide immediate access to salient information in a medium notoriously difficult to search and summarize. To this end, we use a maximum entropy model to automatically detect action item-related utterances from multi-party audio meeting recordings. We compare the effect of lexical, temporal,(More)
This paper describes a recently completed common resource for the study of spoken discourse, the NXT-format Switchboard Corpus. Switchboard is a long-standing corpus of telephone conversations (Godfrey et al., 1992). We have brought together transcriptions with existing annotations for syntax, disfluency, speech acts, animacy, information status,(More)
The immense prosodic variation of natural conversational speech makes it challenging to predict which words are prosodically prominent in this genre. In this paper, we examine a new feature, accent ratio, which captures how likely it is that a word will be realized as prominent or not. We compare this feature with traditional accent-prediction features(More)
We present a framework for the integrated analysis of the textual and prosodic characteristics of information structure in the Switchboard corpus of conversational En-glish. Information structure describes the availability, organisation and salience of entities in a discourse model. We present standards for the annotation of information status (old,(More)
We describe a recognition experiment and two analytic experiments on a database of strongly Hispanic-accented English. We show the crucial importance of training on the Hispanic-accented data for acoustic model performance, and describe the tendency of Spanish-accented speakers to use longer, and presumably less-reduced, schwa vowels than native-English(More)
The pronunciation of a word can vary widely, and many factors are known to affect this variation. This paper focuses on the role of predictability on word duration. Previous research has suggested that more frequent words are shorter, as are words which are more predictable from neighboring words. This research has tended to focus only on extremely high(More)
We describe the results of large scale perception experiments showing improvements in synthesising two distinct kinds of prominence: standard pitch-accent and strong emphatic accents. Previously prominence assignment has been mainly evaluated by computing accuracy on a prominence-labelled test set. By contrast we integrated an automatic pitch-accent(More)