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Paper Abstract and Keywords
Presentation 2026-03-04 14:55
Design and Evaluation of a Run-Length Encoding Accelerator for Artificial Vision Systems
Ryota Matsushita, Yoshinori Takeuchi (Kindai Univ.) VLD2025-80 HWS2025-76 ICD2025-91
Abstract (in Japanese) (See Japanese page) 
(in English) This study aims to improve the speed and power efficiency of data compression in a visual cortex stimulation-based artificial vision system. Run-Length Exponential-Golomb Coding (RLE-EGC) were used as the data compression method. In the conventional C language implementation of RLE, the number of executed instructions was excessive, and limited both real-time performance and energy efficiency. To address this issue, we designed custom instructions and a custom accelerator using RISC-V custom extensions to execute a portion of the encoding process in hardware. Experimental results demonstrated that the executed instruction count and execution cycle count were significantly reduced compared to the conventional software implementation, achieving improved processing performance and reduced power consumption suitable for the artificial vision system.
Keyword (in Japanese) (See Japanese page) 
(in English) CODEC / Artificial Vision System / RISC-V / Run-Length Encoding / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 382, VLD2025-80, pp. 24-29, March 2026.
Paper # VLD2025-80 
Date of Issue 2026-02-25 (VLD, HWS, ICD) 
ISSN 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 VLD2025-80 HWS2025-76 ICD2025-91

Conference Information
Committee ICD HWS VLD  
Conference Date 2026-03-04 - 2026-03-07 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To VLD 
Conference Code 2026-03-ICD-HWS-VLD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design and Evaluation of a Run-Length Encoding Accelerator for Artificial Vision Systems 
Sub Title (in English)  
Keyword(1) CODEC  
Keyword(2) Artificial Vision System  
Keyword(3) RISC-V  
Keyword(4) Run-Length Encoding  
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Keyword(8)  
1st Author's Name Ryota Matsushita  
1st Author's Affiliation Kindai University (Kindai Univ.)
2nd Author's Name Yoshinori Takeuchi  
2nd Author's Affiliation Kindai University (Kindai Univ.)
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Speaker Author-1 
Date Time 2026-03-04 14:55:00 
Presentation Time 25 minutes 
Registration for VLD 
Paper # VLD2025-80, HWS2025-76, ICD2025-91 
Volume (vol) vol.125 
Number (no) no.382(VLD), no.383(HWS), no.384(ICD) 
Page pp.24-29 
#Pages 6 
Date of Issue 2026-02-25 (VLD, HWS, ICD) 

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