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Paper Abstract and Keywords
Presentation 2023-03-02 15:20
High-presence communication through Local 5G ultra-low latency transmission of RGBD images
Ryota Takatsuki, Akihiro Nakao (Tokyo Univ.) NS2022-194
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, the spread of international collaboration and the physical limitations imposed by the new coronavirus pandemic have led to the widespread use of telecommunications such as Web conferencing systems and the Metaverse. However, telecommunication using 3D images has not become widespread due to other technical issues, even though 3D projection devices and RGBD sensors have become easily accessible. In this study, assuming a use case where a whole-body image of a person is received wirelessly at low latency in an ordinary home, we propose a method to transmit RGBD images at 30 fps without relying on advanced computational resources (GPU) in the end system and to visualize the mesh data generated at high speed, thereby achieving a higher sense of presence compared than conventional methods. Prior to the system development, we discuss the “sense of presence” regarding communicating through 3D video transmission and proposed evaluation indices. Developing the system, we will devise a new high-speed method for the codec of RGBD images and mesh generation using only CPUs. We also design a new communication protocol based on UDP for stable wireless transmission of the subject's omnidirectional view. We also devised a new method for the stable registration of multiple cameras using a pose estimation model to improve the UI of the system. An evaluation was conducted in an environment using Local 5G for downlink, which confirmed that at least approximately 25 fps is achieved at the receiver side, the round-trip delay excluding those caused by transmission is approximately 70 ms, and the system runs stably even when the transmission rate fluctuates greatly.
Keyword (in Japanese) (See Japanese page) 
(in English) Realtime communication / Local 5G / RGBD image / Mesh generation / Communication protocol / Multi-camera registration / No GPUs /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 406, NS2022-194, pp. 157-162, March 2023.
Paper # NS2022-194 
Date of Issue 2023-02-23 (NS) 
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 NS2022-194

Conference Information
Committee IN NS  
Conference Date 2023-03-02 - 2023-03-03 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Convention Centre + Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To NS 
Conference Code 2023-03-IN-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) High-presence communication through Local 5G ultra-low latency transmission of RGBD images 
Sub Title (in English)  
Keyword(1) Realtime communication  
Keyword(2) Local 5G  
Keyword(3) RGBD image  
Keyword(4) Mesh generation  
Keyword(5) Communication protocol  
Keyword(6) Multi-camera registration  
Keyword(7) No GPUs  
Keyword(8)  
1st Author's Name Ryota Takatsuki  
1st Author's Affiliation The University of Tokyo (Tokyo Univ.)
2nd Author's Name Akihiro Nakao  
2nd Author's Affiliation The University of Tokyo (Tokyo Univ.)
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Speaker Author-1 
Date Time 2023-03-02 15:20:00 
Presentation Time 20 minutes 
Registration for NS 
Paper # NS2022-194 
Volume (vol) vol.122 
Number (no) no.406 
Page pp.157-162 
#Pages 6 
Date of Issue 2023-02-23 (NS) 

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