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Paper Abstract and Keywords
Presentation 2014-10-03 10:20
Adaptive Expanding Diamond Search using Sub-Sampled Image except in the Small Central Area
Atsushi Tachino, Ryutaro Nishimura, Toshio Kondo, Takahiro Sasaki, Yuki Fukazawa (Mie Univ.) VLD2014-70 ICD2014-63 IE2014-49 Link to ES Tech. Rep. Archives: ICD2014-63
Abstract (in Japanese) (See Japanese page) 
(in English) Demand for the high definition video is increasing, and improving compression performance is desired. Under such circumstances, H.265 with improved compression performance to twice from H.264 has attracted attention.However, the complexity of the process is greatly increased and one cannot get the sufficient encoding speed. The speed up of motion estimation process that accounts for most of the process is essential. TZSearch built into the reference software of H.265 is one of the search algorithm with high acculacy and efficiency. However, TZSearch is not enough to meet the requirements of hsmall computation complexity. Therefore, we proposed a motion estimation algorithm with two effective techniques. One technique is setting the expanding range of diamond search pattern ristricted by the distance from the current search center to next search center. Another technique is usage of the sub-sampled image at the distant search point. We implemented the proposed algorithm on the reference software. As a result, the algorithm reduces 60% of SAD operations and improve memory access efficiency by 35% compared to TZSearch in the condition of minimizin the deterioration of compression ratio and video quality.
Keyword (in Japanese) (See Japanese page) 
(in English) H.265 / Motion Estimation / Expanding Diamond Search / TZSearch / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 233, IE2014-49, pp. 57-62, Oct. 2014.
Paper # IE2014-49 
Date of Issue 2014-09-25 (VLD, ICD, IE) 
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)
Download PDF VLD2014-70 ICD2014-63 IE2014-49 Link to ES Tech. Rep. Archives: ICD2014-63

Conference Information
Conference Date 2014-10-02 - 2014-10-03 
Place (in Japanese) (See Japanese page) 
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Paper Information
Registration To IE 
Conference Code 2014-10-IE-ICD-VLD-SLDM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Adaptive Expanding Diamond Search using Sub-Sampled Image except in the Small Central Area 
Sub Title (in English)  
Keyword(1) H.265  
Keyword(2) Motion Estimation  
Keyword(3) Expanding Diamond Search  
Keyword(4) TZSearch  
1st Author's Name Atsushi Tachino  
1st Author's Affiliation Mie University (Mie Univ.)
2nd Author's Name Ryutaro Nishimura  
2nd Author's Affiliation Mie University (Mie Univ.)
3rd Author's Name Toshio Kondo  
3rd Author's Affiliation Mie University (Mie Univ.)
4th Author's Name Takahiro Sasaki  
4th Author's Affiliation Mie University (Mie Univ.)
5th Author's Name Yuki Fukazawa  
5th Author's Affiliation Mie University (Mie Univ.)
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Date Time 2014-10-03 10:20:00 
Presentation Time 25 
Registration for IE 
Paper # IEICE-VLD2014-70,IEICE-ICD2014-63,IEICE-IE2014-49 
Volume (vol) IEICE-114 
Number (no) no.231(VLD), no.232(ICD), no.233(IE) 
Page pp.57-62 
#Pages IEICE-6 
Date of Issue IEICE-VLD-2014-09-25,IEICE-ICD-2014-09-25,IEICE-IE-2014-09-25 

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