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Paper Abstract and Keywords
Presentation 2026-03-04 14:50
Region of Interest-Aware Semantic Communications for Image Transmission via Knowledge Distillation
Xu, Haoran, Mondher, Bouazizi, Yin, Yue, Ohtsuki, Tomoaki (keio) RCS2025-265
Abstract (in Japanese) (See Japanese page) 
(in English) Semantic communication has emerged as a promising paradigm to break the Shannon limit by transmitting task-relevant information rather than raw data bits. However, existing approaches often struggle with adaptive task-driven capabilities and performance degradation in low Signal-to-Noise Ratio (SNR) regimes. In this paper, we propose a Region of Interest (ROI)-aware semantic communication system utilizing Knowledge Distillation (KD). We design a teacher-student framework where a lightweight student policy network learns from a large vision-language model to generate accurate, prompt-driven attention maps. These maps guide a Joint Source-Channel Coding (JSCC) encoder to perform adaptive power allocation, concentrating energy on semantically important regions. Experimental results on the RefCOCO dataset demonstrate that our method significantly outperforms standard JSCC and Prompt Semantic Communication (PSC) in low-SNR conditions (below 0~dB) while maintaining comparable performance in high-SNR regimes and reducing bandwidth consumption by approximately 25%. Furthermore, the low computational complexity of the proposed student network facilitates efficient deployment on resource-constrained edge devices.
Keyword (in Japanese) (See Japanese page) 
(in English) Semantic Communication / Knowledge Distillation / Joint Source-Channel Coding / Power Allocation / Attention Mechanism / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 387, RCS2025-265, pp. 43-48, March 2026.
Paper # RCS2025-265 
Date of Issue 2026-02-25 (RCS) 
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 RCS2025-265

Conference Information
Committee RCS SR SRW  
Conference Date 2026-03-04 - 2026-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo University of Science 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2026-03-RCS-SR-SRW 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Region of Interest-Aware Semantic Communications for Image Transmission via Knowledge Distillation 
Sub Title (in English)  
Keyword(1) Semantic Communication  
Keyword(2) Knowledge Distillation  
Keyword(3) Joint Source-Channel Coding  
Keyword(4) Power Allocation  
Keyword(5) Attention Mechanism  
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1st Author's Name Xu, Haoran  
1st Author's Affiliation Keio University (keio)
2nd Author's Name Mondher, Bouazizi  
2nd Author's Affiliation Keio University (keio)
3rd Author's Name Yin, Yue  
3rd Author's Affiliation Keio University (keio)
4th Author's Name Ohtsuki, Tomoaki  
4th Author's Affiliation Keio University (keio)
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Speaker Author-1 
Date Time 2026-03-04 14:50:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2025-265 
Volume (vol) vol.125 
Number (no) no.387 
Page pp.43-48 
#Pages 6 
Date of Issue 2026-02-25 (RCS) 

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