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IEICE TRANSACTIONS on Information

AURORA-2J: An Evaluation Framework for Japanese Noisy Speech Recognition

Satoshi NAKAMURA, Kazuya TAKEDA, Kazumasa YAMAMOTO, Takeshi YAMADA, Shingo KUROIWA, Norihide KITAOKA, Takanobu NISHIURA, Akira SASOU, Mitsunori MIZUMACHI, Chiyomi MIYAJIMA, Masakiyo FUJIMOTO, Toshiki ENDO

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Summary :

This paper introduces an evaluation framework for Japanese noisy speech recognition named AURORA-2J. Speech recognition systems must still be improved to be robust to noisy environments, but this improvement requires development of the standard evaluation corpus and assessment technologies. Recently, the Aurora 2, 3 and 4 corpora and their evaluation scenarios have had significant impact on noisy speech recognition research. The AURORA-2J is a Japanese connected digits corpus and its evaluation scripts are designed in the same way as Aurora 2 with the help of European Telecommunications Standards Institute (ETSI) AURORA group. This paper describes the data collection, baseline scripts, and its baseline performance. We also propose a new performance analysis method that considers differences in recognition performance among speakers. This method is based on the word accuracy per speaker, revealing the degree of the individual difference of the recognition performance. We also propose categorization of modifications, applied to the original HTK baseline system, which helps in comparing the systems and in recognizing technologies that improve the performance best within the same category.

Publication
IEICE TRANSACTIONS on Information Vol.E88-D No.3 pp.535-544
Publication Date
2005/03/01
Publicized
Online ISSN
DOI
10.1093/ietisy/e88-d.3.535
Type of Manuscript
Special Section PAPER (Special Section on Corpus-Based Speech Technologies)
Category
Speech Corpora and Related Topics

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