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Advanced Rich Transcription System for Estonian Speech

lib:2ace0fc4e5daab5a (v1.0.0)

Authors: Tanel Alumäe,Ottokar Tilk,Asadullah
ArXiv: 1901.03601
Document:  PDF  DOI 
Abstract URL: http://arxiv.org/abs/1901.03601v1

This paper describes the current TT\"U speech transcription system for Estonian speech. The system is designed to handle semi-spontaneous speech, such as broadcast conversations, lecture recordings and interviews recorded in diverse acoustic conditions. The system is based on the Kaldi toolkit. Multi-condition training using background noise profiles extracted automatically from untranscribed data is used to improve the robustness of the system. Out-of-vocabulary words are recovered using a phoneme n-gram based decoding subgraph and a FST-based phoneme-to-grapheme model. The system achieves a word error rate of 8.1% on a test set of broadcast conversations. The system also performs punctuation recovery and speaker identification. Speaker identification models are trained using a recently proposed weakly supervised training method.

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