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Paper Abstract and Keywords
Presentation 2009-10-15 15:00
A Method for Improving Picture Quality of Irreversibly Encoded Sub-Sampling Pictures
Makoto Tadenuma, Kazuhisa Iguchi (NHK) SIP2009-61 IE2009-86
Abstract (in Japanese) (See Japanese page) 
(in English) Unprocessed luminance component of the pictures, which are picked up by current Super Hi-Vision cameras or single imaging plate-type cameras for consumers, consists of sub-sampling data, so when the images are directly coded in a high compression rate by an irreversible encoding like MPEG2, distinctive degradation of picture quality occurs. As a method for improving the degradation, we invent a new pre and post processing technique; in which high frequency ingredients of horizontal and vertical direction are converted to the orthogonal frequency area where original picture has no ingredients, then numbers of pixel are decreased into 3/4 in both horizontal and vertical direction. When this process is applied, the picture quality of irreversibly encoded sub-sampling pictures in high compression rate is improved with less quantity of data.
Keyword (in Japanese) (See Japanese page) 
(in English) Sub-Sampling / Irreversible Encoding / Picture Quality Improvement / Data Amount Reduction / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 226, SIP2009-61, pp. 29-34, Oct. 2009.
Paper # SIP2009-61 
Date of Issue 2009-10-08 (SIP, 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 SIP2009-61 IE2009-86

Conference Information
Committee SIP IE IPSJ-SLDM  
Conference Date 2009-10-15 - 2009-10-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Awara Onsen "Matsuya Sensen" 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Processor, DSP, image processing, etc. 
Paper Information
Registration To SIP 
Conference Code 2009-10-SIP-IE-SLDM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Method for Improving Picture Quality of Irreversibly Encoded Sub-Sampling Pictures 
Sub Title (in English)  
Keyword(1) Sub-Sampling  
Keyword(2) Irreversible Encoding  
Keyword(3) Picture Quality Improvement  
Keyword(4) Data Amount Reduction  
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1st Author's Name Makoto Tadenuma  
1st Author's Affiliation Science & Technology Research Laboratories, NHK (NHK)
2nd Author's Name Kazuhisa Iguchi  
2nd Author's Affiliation Science & Technology Research Laboratories, NHK (NHK)
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Speaker Author-1 
Date Time 2009-10-15 15:00:00 
Presentation Time 20 minutes 
Registration for SIP 
Paper # SIP2009-61, IE2009-86 
Volume (vol) vol.109 
Number (no) no.226(SIP), no.227(IE) 
Page pp.29-34 
#Pages 6 
Date of Issue 2009-10-08 (SIP, IE) 

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