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Báo cáo khoa học: "A concurrent approach to the automatic extraction of subsegmental primes and phonological constituents from speech"

Then, when a segment containing the prime in less than minimal combination is presented for identification, its location in cue space lies within a restricted number of units of within-cluster variance of the central location of the prime cluster. The number of such distance units determines headedness in the segment, with separate thresholds for occurrence as head and as operator. In § 3 we describe in more detail the stagewise procedure for identifying via quadratic discriminants the primes present in segments. . | A concurrent approach to the automatic extraction of subsegmental primes and phonological constituents from speech Michael INGLEBY School of Computing and Mathematics University of Huddersfield Queensgate Huddersfield HD1 3DH UK M.Ingleby@hud.ac.uk Abstract We demonstrate the feasibility of using unary primes in speech-driven language processing. Proponents of Government Phonology one of several phonological frameworks in which speech segments are represented as combinations of relatively few subsegmental primes claim that primes are acoustically realisable. This claim is examined critically searching out signatures for primes in multispeaker speech signal data. In response to a wide variation in the ease of detection of primes it is proposed that the computational approach to phonology-based speech-driven software should be organised in stages. After each stage computational processes like segmentation and lexical access can be launched to run concurrently with later stages of prime detection. Introduction and overview In 1 the subsegmental primes and phonological constituents used in Government Phonology GP are described and the acoustic realisability claims which make GP primes seem particularly attractive to developers of speech-driven software are summarised. We then outline an approach to defining identification signatures for primes 2 . Our approach is based on cluster analysis using a set of acoustic cues chosen to reflect familiar events in spectrograms plosion frication excitation resonance. We note that cues indicating manner of articulation which change abruptly at segment boundaries are computationally simple while those for voicing state and resonance quality are complex and calculable only after signal segmentation. Also Wiebke BROCKHAUS Department of German University of Manchester Oxford Rd Manchester Ml3 9PL UK Wiebke.Brockhaus@man.ac.uk the regions of cue space where the primes cluster and which serve as their signatures are disconnected with .