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Paper Abstract and Keywords
Presentation 2018-03-06 13:50
Improvement of frame synchronization for the bilateral time-spread echo hiding technology and its evaluation for long-distance aerial transmission
Akira Nishimura (Tokyo Univ. of Info. Sci.) EMM2017-93
Abstract (in Japanese) (See Japanese page) 
(in English) An improved frame synchronization for the bilateral time-spread echo hiding method is proposed for an
aerial audio data hiding in which speech signals are broadcast by the outdoor loudspeakers of a voice evacuation and
mass notification system. Evaluations of the data hiding system for speech signals were conducted using computer
simulations including several disturbances caused by the long-distance (from 70 to 800 meters) aerial transmission
of sounds. The frequency response of a distant horn-array loudspeaker system, the absorption of sound by the
atmosphere, reverberation and a single long-path echo, a constant frequency shift that mimics a small Doppler shift
and a mismatch of sampling frequencies between sending and receiving devices, and additive background noise which
mimics a loud outdoor space in a city at SNRs of –5, 0, and 5 dB are simulated as disturbances. The computer
simulation results showed that the improved synchronization and an appropriate delay time of the time-spread echo
realized several percentages of improvements in the bit error rates (BERs). The BERs obtained from the female
speakers were generally worse than those obtained from the male speakers. The BERs also depended on the types
of background noise.
Keyword (in Japanese) (See Japanese page) 
(in English) frequency response / absorption by the atomsphere / reverberation / background noise / signal-to-noise ratio / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 476, EMM2017-93, pp. 85-90, March 2018.
Paper # EMM2017-93 
Date of Issue 2018-02-26 (EMM) 
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 EMM2017-93

Conference Information
Committee EMM  
Conference Date 2018-03-05 - 2018-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Naze Community Center (Amami-Shi, Kagoshima) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Image and Sound Quality, Metrics for Perception and Recognition, Human Auditory and Visual System, etc. 
Paper Information
Registration To EMM 
Conference Code 2018-03-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of frame synchronization for the bilateral time-spread echo hiding technology and its evaluation for long-distance aerial transmission 
Sub Title (in English)  
Keyword(1) frequency response  
Keyword(2) absorption by the atomsphere  
Keyword(3) reverberation  
Keyword(4) background noise  
Keyword(5) signal-to-noise ratio  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Akira Nishimura  
1st Author's Affiliation Tokyo University of Information Sciences (Tokyo Univ. of Info. Sci.)
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Speaker Author-1 
Date Time 2018-03-06 13:50:00 
Presentation Time 25 minutes 
Registration for EMM 
Paper # EMM2017-93 
Volume (vol) vol.117 
Number (no) no.476 
Page pp.85-90 
#Pages 6 
Date of Issue 2018-02-26 (EMM) 

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