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Improved Features and Models for Detecting Edit Disfluencies in Transcribing Spontaneous Mandarin Speech

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2 Author(s)
Che-kuang Lin ; Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Lin-shan Lee

Detection of edit disfluencies is key to transcribing spontaneous utterances. In this paper, we present improved features and models to detect edit disfluencies and enhance transcription of spontaneous Mandarin speech using hypothesized disfluency interruption points (IPs) and edit word detection. A comprehensive set of prosodic features that takes into account the special characteristics of edit disfluencies in Mandarin is developed, and an improved model combining decision trees and maximum entropy is proposed to detect IPs. This model is further adapted to desired prosodic conditions by latent prosodic modeling, a probabilistic framework for analyzing speech prosody in terms of a set of latent prosodic states. These techniques contribute to higher recognition accuracy (by rescoring with the hypothesized IPs) and better edit word detection (using conditional random fields defined on Chinese characters) in the final transcription, as verified by experiments on a spontaneous Mandarin speech corpus.

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Audio, Speech, and Language Processing, IEEE Transactions on  (Volume:17 ,  Issue: 7 )