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Paper Abstract and Keywords
Presentation 2014-01-27 16:25
Non-linear distortion reduction by equalization of input signal in time domain
Kihiro Hashino, Naoto Sakata, Yuki Kato, Hirofumi Nakajima, Kazunori Miyoshi (Kogakuin Univ.) EA2013-106
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a reduction method of non-linear distortions for long input signals which are difficult in frequency domain methods of previous studies. The proposed method performs recursive process of the sub-processes: extraction non-linear distortion signal, inverse filtering with the distortion signal, and subtraction the equalized distortion signal from the input signal. To reduce the processing time of convolutions, An OverLap-Add method is used. Experimental results show that our method can equalize a non-linear distortion by 16.3dB for a music signal of about 4 minutes, that is impossible to equalize in the previous frequency domain method. We also performed non-linear distortion reductions of headphones in a simulated actual environment, which was an another issue of the previous studies. The equalize processes of headphones were executed using a dummy head microphone built-in an ear simulator whose acoustic impedance similar to the actual ear. As experimental results, our method can reduce non-linear distortions by 11.3dB. These results show that the proposed method is effective even if there are differences between equalizing and reproducing environments.
Keyword (in Japanese) (See Japanese page) 
(in English) Non-linear distortion / Reduction / Recursive equalization / Sound quality equalization / Time domain / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 413, EA2013-106, pp. 15-20, Jan. 2014.
Paper # EA2013-106 
Date of Issue 2014-01-20 (EA) 
ISSN Print edition: ISSN 0913-5685    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 EA2013-106

Conference Information
Committee EA US  
Conference Date 2014-01-27 - 2014-01-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Kansai University, Centenary Memorial Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics，and Related Topics 
Paper Information
Registration To EA 
Conference Code 2014-01-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Non-linear distortion reduction by equalization of input signal in time domain 
Sub Title (in English)  
Keyword(1) Non-linear distortion  
Keyword(2) Reduction  
Keyword(3) Recursive equalization  
Keyword(4) Sound quality equalization  
Keyword(5) Time domain  
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Keyword(7)  
Keyword(8)  
1st Author's Name Kihiro Hashino  
1st Author's Affiliation Kogakuin University (Kogakuin Univ.)
2nd Author's Name Naoto Sakata  
2nd Author's Affiliation Kogakuin University (Kogakuin Univ.)
3rd Author's Name Yuki Kato  
3rd Author's Affiliation Kogakuin University (Kogakuin Univ.)
4th Author's Name Hirofumi Nakajima  
4th Author's Affiliation Kogakuin University (Kogakuin Univ.)
5th Author's Name Kazunori Miyoshi  
5th Author's Affiliation Kogakuin University (Kogakuin Univ.)
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Speaker Author-1 
Date Time 2014-01-27 16:25:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2013-106 
Volume (vol) vol.113 
Number (no) no.413 
Page pp.15-20 
#Pages 6 
Date of Issue 2014-01-20 (EA) 

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