NDLI: Using parallel tokenizers with DTW matrix combination for low-resource spoken term detection

Content Provider	IEEE Xplore Digital Library
Author	Haipeng Wang Tan Lee Cheung-Chi Leung Bin Ma Haizhou Li
Copyright Year	2013
Description	Author affiliation: Inst. for Infocomm Res., A*STAR, Singapore, Singapore (Cheung-Chi Leung; Bin Ma; Haizhou Li) \|\| Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong, China (Haipeng Wang; Tan Lee)
Abstract	Recently the posteriorgram-based template matching framework has been successfully applied to query-by-example spoken term detection tasks for low-resource languages. This framework employs a tokenizer to derive posteriorgrams, and applies dynamic time warping (DTW) to the posteriorgrams to locate the possible occurrences of a query term. Based on this framework, we propose to improve the detection performance by using multiple tokenizers with DTW distance matrix combination. The proposed approach uses multiple tokenizers in parallel as the front-end to generate different posteriorgram representations, and combines the distance matrices of the different posteriorgrams into a single matrix. DTW detection is then applied to the combined distance matrix. Lastly score post-processing techniques including pseudo-relevance feedback and score normalization are used for further improvement. Experiments were conducted on the spoken web search datasets of MediaEval 2011 and MediaEval 2012. Experimental results show that combining multiple tokenizers significantly outperforms the best single tokenizer, and that the DTW matrix combination method consistently outperforms the score combination method when more than three tokenizers are involved. Score post-processing techniques show further gains on top of using multiple tokenizers.
Starting Page	8545
Ending Page	8549
File Size	182068
Page Count	5
File Format	PDF
ISBN	9781479903566
ISSN	15206149
DOI	10.1109/ICASSP.2013.6639333
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-26
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Matrix converters Speech Robustness Acoustics Training Vectors Educational institutions pseudo-relevance feedback query-by-example spoken term detection DTW matrix combination tandem tokenizer
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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