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Paper Abstract and Keywords
Presentation 2026-03-03 11:00
[Poster Presentation] J-SPAW2: A Japanese Speech Corpus for Analyzing Recording Conditions in Replay Attacks
Suzuka Horie (Tokyo Metropolitan Univ.), Shinnosuke Takamichi (Keio Univ.), Sayaka Shiota (Tokyo Metropolitan Univ.) EA2025-120 SIP2025-140 SP2025-73
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, countermeasures against voice spoofing attacks against speaker verification have become increasingly important. Therefore, in this study, we constructed the Japanese speech corpus J-SPAW2, which can analyze the attack conditions that make detection difficult, in order to clarify the threat of recording and playback attacks against speaker verification and voice spoofing detection. Specifically, we re-recorded speech from the existing speech corpus J-SPAW under various physical environmental conditions, such as playback equipment and recording conditions, to create spoofed speech that is more difficult to detect. Experimental results showed that even the most advanced detection model performed significantly worse under low-volume, long-distance recording conditions with low SNR. Conversely, speaker verification was easily defeated under high-volume, close-distance recording conditions. Furthermore, analysis using the integrated evaluation metric t-DCF revealed that the entire system had serious vulnerabilities under certain conditions, demonstrating the usefulness of this corpus for evaluation in real-world environments.
Keyword (in Japanese) (See Japanese page) 
(in English) speaker verification / spoofing attack / recording and playback attacks / audio corpus / recording environment / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 371, SP2025-73, pp. 283-288, March 2026.
Paper # SP2025-73 
Date of Issue 2026-02-23 (EA, SIP, SP) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EA2025-120 SIP2025-140 SP2025-73

Conference Information
Committee SP EA SIP IPSJ-SLP  
Conference Date 2026-03-02 - 2026-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To SP 
Conference Code 2026-03-SP-EA-SIP-SLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) J-SPAW2: A Japanese Speech Corpus for Analyzing Recording Conditions in Replay Attacks 
Sub Title (in English)  
Keyword(1) speaker verification  
Keyword(2) spoofing attack  
Keyword(3) recording and playback attacks  
Keyword(4) audio corpus  
Keyword(5) recording environment  
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1st Author's Name Suzuka Horie  
1st Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ.)
2nd Author's Name Shinnosuke Takamichi  
2nd Author's Affiliation Keio University (Keio Univ.)
3rd Author's Name Sayaka Shiota  
3rd Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ.)
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Speaker Author-1 
Date Time 2026-03-03 11:00:00 
Presentation Time 80 minutes 
Registration for SP 
Paper # EA2025-120, SIP2025-140, SP2025-73 
Volume (vol) vol.125 
Number (no) no.369(EA), no.370(SIP), no.371(SP) 
Page pp.283-288 
#Pages 6 
Date of Issue 2026-02-23 (EA, SIP, SP) 

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