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Paper Abstract and Keywords
Presentation 2006-12-14 13:50
Adaptive Pre-Filter for Image Quality Fluctuation of Intra-Frame and Inter-Frame
Tokinobu Mitasaki, Naoki Ono, Kazuto Kamikura, Yoshiyuki Yashima (NTT) CS2006-50 IE2006-118
Abstract (in Japanese) (See Japanese page) 
(in English) In video coding processing, a pre-filter is often used for a high efficiency coding and a noise rejection as a pre-processing. We proposed an adaptive frame-by-frame pre-filter that made comparable objective image quality for every frame after pre-filtering. If a frequency for each region in frame was deferent, the image quality was also different and deteriorated subjectively because the same bandwidth was used for all regions in the frame. Even though the high-frequency components in the region with fast motion, such as watering and camera panning, is less remarkable than the one with stasis as the image quality deterioration and has influence on the encoding efficiency, existing our filter used the same bandwidth which is determined by only the objective image quality regardless of motion. By considering the motion information and cutting off the bandwidth for the high frequency component in the region with the motion wider than the one with the stasis, we can improve the encoding efficiency while the subjective image quality with motion information is equal to the one without motion information. In this report, we propose an adaptive pre-filter for image quality fluctuation of intra-frame and inter-frame to improve the subjective image quality and the encoding efficiency. By the experiment for comparing the new method and existing method, we show that the encoding efficiency is improved while the subjective quality of images filtered by these methods are almost same.
Keyword (in Japanese) (See Japanese page) 
(in English) Filter / Bandwidth / Frequency / Motion / Intra-frame / Inter-frame / /  
Reference Info. IEICE Tech. Rep., vol. 106, no. 423, IE2006-118, pp. 13-18, Dec. 2006.
Paper # IE2006-118 
Date of Issue 2006-12-07 (CS, IE) 
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 CS2006-50 IE2006-118

Conference Information
Committee CS IE ITE-BCT IPSJ-AVM  
Conference Date 2006-12-14 - 2006-12-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Image coding, Communications and Stream Technologies, etc. 
Paper Information
Registration To IE 
Conference Code 2006-12-CS-IE-ITE-BCT-IPSJ-AVM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Adaptive Pre-Filter for Image Quality Fluctuation of Intra-Frame and Inter-Frame 
Sub Title (in English)  
Keyword(1) Filter  
Keyword(2) Bandwidth  
Keyword(3) Frequency  
Keyword(4) Motion  
Keyword(5) Intra-frame  
Keyword(6) Inter-frame  
Keyword(7)  
Keyword(8)  
1st Author's Name Tokinobu Mitasaki  
1st Author's Affiliation NTT CyberSpace Laboratories, NTT Corporation (NTT)
2nd Author's Name Naoki Ono  
2nd Author's Affiliation NTT CyberSpace Laboratories, NTT Corporation (NTT)
3rd Author's Name Kazuto Kamikura  
3rd Author's Affiliation NTT CyberSpace Laboratories, NTT Corporation (NTT)
4th Author's Name Yoshiyuki Yashima  
4th Author's Affiliation NTT CyberSpace Laboratories, NTT Corporation (NTT)
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Speaker Author-1 
Date Time 2006-12-14 13:50:00 
Presentation Time 25 minutes 
Registration for IE 
Paper # CS2006-50, IE2006-118 
Volume (vol) vol.106 
Number (no) no.421(CS), no.423(IE) 
Page pp.13-18 
#Pages 6 
Date of Issue 2006-12-07 (CS, IE) 

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