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Paper Abstract and Keywords
Presentation 2007-11-15 12:50
Proposal of multi channel IP-based audio transmission system with phase adjustment function
Atsushi Okada, Hiroyuki Kimiyama, Tsuyoshi Ogura (NTT) NS2007-94
Abstract (in Japanese) (See Japanese page) 
(in English) For the production of relay programs in broadcasting stations and for use in various types of contents production, we propose a multi channel IP-based audio transmission system with automatic phase adjustment, which shifts the output timing between audio signals to prevent opposite phase cancellation. We aim to automate this operation, which is currently performed manually by an audio engineer in the broadcasting station during mixing. We use cross-power spectrum phase (CSP) analysis, which is a talker localization method, for this phase adjustment. Using CSP analysis, we devised a method of calculating the amount of output timing shift with less processing and installed this basic function in a general-purpose personal computer. The evaluation results should lead to systems that can transmit 40 audio channels within 33 ms.
Keyword (in Japanese) (See Japanese page) 
(in English) multi channel audio / phase adjustment / CSP method / IP-transmission / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 311, NS2007-94, pp. 1-6, Nov. 2007.
Paper # NS2007-94 
Date of Issue 2007-11-08 (NS) 
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)
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Conference Information
Committee NS ICM CQ  
Conference Date 2007-11-15 - 2007-11-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Institute of System LSI Design Industry, Fukuoka 
Topics (in Japanese) (See Japanese page) 
Topics (in English) NGN architecture, NGN operation architecture, Traffic modeling, Overlay networking, etc. 
Paper Information
Registration To NS 
Conference Code 2007-11-NS-TM-CQ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Proposal of multi channel IP-based audio transmission system with phase adjustment function 
Sub Title (in English)  
Keyword(1) multi channel audio  
Keyword(2) phase adjustment  
Keyword(3) CSP method  
Keyword(4) IP-transmission  
1st Author's Name Atsushi Okada  
1st Author's Affiliation NTT Network Innovation Laboratories (NTT)
2nd Author's Name Hiroyuki Kimiyama  
2nd Author's Affiliation NTT Network Innovation Laboratories (NTT)
3rd Author's Name Tsuyoshi Ogura  
3rd Author's Affiliation NTT Network Innovation Laboratories (NTT)
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Speaker Author-1 
Date Time 2007-11-15 12:50:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2007-94 
Volume (vol) vol.107 
Number (no) no.311 
Page pp.1-6 
Date of Issue 2007-11-08 (NS) 

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