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Paper Abstract and Keywords
Presentation 2009-12-17 14:50
A pitch estimator with inverse notch filters extracting harmonic components
Arata Kawamura, Motoki Mizuno, Youji Iiguni (Osaka Univ.) SIS2009-39
Abstract (in Japanese) (See Japanese page) 
(in English) Pitch name estimation is an indispensable technique for achieving automatic music transcription. We previously proposed a pitch (fundamental frequency) estimator using inverse notch filters that achieve extremely narrow pass-band. The inverse notch filters are designed so that its center frequency is corresponding to the pitch of a music signal. The inverse notch filters are connected in parallel. Since their output includes only a specified frequency component of the music signal, the inverse notch filter directly gives a pitch estimate when its output power is greater than a threshold. But, when the magnitude of the pitch is less than the other frequency's one, the capability of the pitch estimator degrades. In this paper, we propose a new pitch estimator utilizing harmonic components of a music signal. When the 2nd harmonic component is firstly detected as a pitch candidate, the frequency of it multiplied by 3/2 exists. In this case, the proposed pitch estimator gives a pitch estimate as a half of the detected pitch candidate. Simulation results show that the proposed pitch estimator can improve an estimation accuracy than the conventional one.
Keyword (in Japanese) (See Japanese page) 
(in English) automatic music transcription / pitch name estimation / notch filter / inverse notch filter / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 338, SIS2009-39, pp. 49-53, Dec. 2009.
Paper # SIS2009-39 
Date of Issue 2009-12-10 (SIS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee SIS  
Conference Date 2009-12-17 - 2009-12-18 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIS 
Conference Code 2009-12-SIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A pitch estimator with inverse notch filters extracting harmonic components 
Sub Title (in English)  
Keyword(1) automatic music transcription  
Keyword(2) pitch name estimation  
Keyword(3) notch filter  
Keyword(4) inverse notch filter  
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1st Author's Name Arata Kawamura  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Motoki Mizuno  
2nd Author's Affiliation Osaka University (Osaka Univ.)
3rd Author's Name Youji Iiguni  
3rd Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2009-12-17 14:50:00 
Presentation Time 20 minutes 
Registration for SIS 
Paper # SIS2009-39 
Volume (vol) vol.109 
Number (no) no.338 
Page pp.49-53 
#Pages 5 
Date of Issue 2009-12-10 (SIS) 

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