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Paper Abstract and Keywords
Presentation 2017-05-22 14:45
Distortion-Free AGC/ALC for Fetal Doppler Audio Signal Envelop
Seiji Matsumoto (Asahikawa Med. Univ. Hospital), Manabu Koda (Akibagaoka Lab.), Yasuhito Takeuchi (Asahikawa Med. Univ.) US2017-17
Abstract (in Japanese) (See Japanese page) 
(in English) Abstract: When applying an instantaneous AGC/ALC to fetal Doppler signal, the envelop distortion caused by rapid gain changing on attack process causes erroneous or uncertain heart rate measurement due to modified envelop of the signal. The syndrome can’t be solved only by adjusting its attack and/or decay time constant. In this study we try to use detoured/delayed signal AGC/ALC system where the delayed main channel gain is controlled by un-delayed sub channel AGC/ALC control parameter, in order not to distort envelop of heart beat signal. This method was found effective in experiment, however, in real signal a variety of other variation prevented its unanimous effectiveness. The project is left open for further study.
Keyword (in Japanese) (See Japanese page) 
(in English) Doppler / Fetal Monitoring / AGC / ALC / Attack / Decay / Heart Rate Variability /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 41, US2017-17, pp. 19-21, May 2017.
Paper # US2017-17 
Date of Issue 2017-05-15 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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 US2017-17

Conference Information
Committee US  
Conference Date 2017-05-22 - 2017-05-22 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To US 
Conference Code 2017-05-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Distortion-Free AGC/ALC for Fetal Doppler Audio Signal Envelop 
Sub Title (in English)  
Keyword(1) Doppler  
Keyword(2) Fetal Monitoring  
Keyword(3) AGC  
Keyword(4) ALC  
Keyword(5) Attack  
Keyword(6) Decay  
Keyword(7) Heart Rate Variability  
1st Author's Name Seiji Matsumoto  
1st Author's Affiliation Asahikawa Medical University Hospital (Asahikawa Med. Univ. Hospital)
2nd Author's Name Manabu Koda  
2nd Author's Affiliation Akibagaoka Laboratory (Akibagaoka Lab.)
3rd Author's Name Yasuhito Takeuchi  
3rd Author's Affiliation Asahikawa Medical University (Asahikawa Med. Univ.)
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Speaker Author-1 
Date Time 2017-05-22 14:45:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2017-17 
Volume (vol) vol.117 
Number (no) no.41 
Page pp.19-21 
Date of Issue 2017-05-15 (US) 

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