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Hierarchical Recurrent Neural Network for Story Segmentation

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publicationProceedings Interspeech 2017
PublisherInternational Speech Communication Association
Pages2919-2923
Number of pages5
DOIs
Publication statusPublished - 24 Aug 2017
EventInterspeech 2017 - Stockholm, Sweden
Duration: 20 Aug 201724 Aug 2017
http://www.interspeech2017.org/

Publication series

NameInterspeech
PublisherInternational Speech Communication Association
ISSN (Print)1990-9772

Conference

ConferenceInterspeech 2017
CountrySweden
CityStockholm
Period20/08/1724/08/17
Internet address

Abstract

A broadcast news stream consists of a number of stories and each story consists of several sentences. We capture this structure using a hierarchical model based on a word-level Recurrent Neural Network (RNN) sentence modeling layer and a sentence-level bidirectional Long Short-Term Memory (LSTM) topic modeling layer. First, the word-level RNN layer extracts a vector embedding the sentence information from the given transcribed lexical tokens of each sentence. These sentence embedding vectors are fed into a bidirectional LSTM that models the sentence and topic transitions. A topic posterior for each sentence is estimated discriminatively and a Hidden Markov model (HMM) follows to decode the story sequence and identify story boundaries. Experiments on the topic detection and tracking (TDT2) task indicate that the hierarchical RNN topic modeling achieves the best story segmentation performance with a higher F1-measure compared to conventional state-of-the-art methods. We also compare variations of our model to infer the optimal structure for the story segmentation task.

Event

Interspeech 2017

20/08/1724/08/17

Stockholm, Sweden

Event: Conference

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