Publication Details

Score Normalization and System Combination for Improved Keyword Spotting

KARAKOS, D.; SCHWARTZ, R.; TSAKALIDIS, S.; ZHANG, L.; RANJAN, S.; NG, T.; HSIAO, R.; NGUYEN, L.; GRÉZL, F.; HANNEMANN, M.; KARAFIÁT, M.; SZŐKE, I.; VESELÝ, K. Score Normalization and System Combination for Improved Keyword Spotting. In Proceedings of ASRU 2013. Olomouc: IEEE Signal Processing Society, 2013. p. 210-215. ISBN: 978-1-4799-2755-5.
Czech title
Normalizace skóre a kombinace systémů pro vylepšenou detekci klíčových slov
Type
conference paper
Language
English
Authors
Karakos Damianos (FIT)
Schwartz Richard (FIT)
Tsakalidis Stavros (FIT)
Zhang Le (FIT)
Ranjan Shivesh (FIT)
Ng Tim
Hsiao Roger (FIT)
Nguyen Long
Grézl František, Ing., Ph.D. (DCGM)
Hannemann Mirko, Ph.D.
Karafiát Martin, Ing., Ph.D. (DCGM)
Szőke Igor, Ing., Ph.D. (DCGM)
Veselý Karel, Ing., Ph.D. (DCGM)
and others
URL
Keywords

keyword search, score normalization, system combination, indexing and search

Abstract

This article is about Score Normalization and System Combination for Improved Keyword Spotting (KWS).

Annotation

We present two techniques that are shown to yield improved Key- word Spotting (KWS) performance when using the ATWV/MTWV performance measures: (i) score normalization, where the scores of different keywords become commensurate with each other and they more closely correspond to the probability of being correct than raw posteriors; and (ii) system combination, where the detections of multiple systems are merged together, and their scores are in- terpolated with weights which are optimized using MTWV as the maximization criterion. Both score normalization and system com- bination approaches show that significant gains in ATWV/MTWV can be obtained, sometimes on the order of 8-10 points (absolute), in five different languages. A variant of these methods resulted in the highest performance for the official surprise language evaluation for the IARPA-funded Babel project in April 2013.

Published
2013
Pages
210–215
Proceedings
Proceedings of ASRU 2013
ISBN
978-1-4799-2755-5
Publisher
IEEE Signal Processing Society
Place
Olomouc
DOI
10.1109/ASRU.2013.6707731
EID Scopus
2-s2.0-84893692703
BibTeX 
@inproceedings{BUT105974,
  author="Damianos {Karakos} and Richard {Schwartz} and Stavros {Tsakalidis} and Le {Zhang} and Shivesh {Ranjan} and Tim {Ng} and Roger {Hsiao} and Long {Nguyen} and František {Grézl} and Mirko {Hannemann} and Martin {Karafiát} and Igor {Szőke} and Karel {Veselý}",
  title="Score Normalization and System Combination for Improved Keyword Spotting",
  booktitle="Proceedings of ASRU 2013",
  year="2013",
  pages="210--215",
  publisher="IEEE Signal Processing Society",
  address="Olomouc",
  doi="10.1109/ASRU.2013.6707731",
  isbn="978-1-4799-2755-5",
  url="https://ieeexplore.ieee.org/document/6707731"
}
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