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Evaluation of compressed video-images for emergency telemedicine work with trauma patients

Authors
 Dong-Keun Kim  ;  Sun K Yoo  ;  Seung H Kim  ;  Yoo S Youn  ;  In-Cheol Park  ;  Ho-Hyun Kang 
Citation
 JOURNAL OF TELEMEDICINE AND TELECARE, Vol.10(Suppl1) : 64-66, 2004 
Journal Title
 JOURNAL OF TELEMEDICINE AND TELECARE 
ISSN
 1357-633X 
Issue Date
2004
MeSH
Data Compression ; Emergencies ; Humans ; Remote Consultation/methods ; Remote Consultation/standards* ; Single-Blind Method ; Videotape Recording/methods ; Videotape Recording/standards* ; Wounds and Injuries/diagnosis*
Abstract
Video-encoders in telemedicine systems need to adjust their coding methods for operation on heterogeneous networks on which bandwidth fluctuates. We evaluated MPEG-4 compressed video-pictures of three trauma patients. We compared the original video-frames with compressed video-frames in terms of the peak signal-to-noise ratio (PSNR). In a qualitative evaluation, three emergency specialists scored the quality of the video-images blind, on a five-point scale (1= bad to 5 = excellent). The PSNR increased as the bit rate increased from 0.2 to 6 Mbit/s. When the bit rate was fixed, in other words at a given network bandwidth, a higher PSNR was obtained at the expense of spatial resolution and frame rate. The video quality was highly affected by the amount of camera shake. Emergency telemedicine systems require a high bit rate, high spatial resolution and a high frame rate to achieve optimum video quality. However, if the bandwidth is limited (i.e. the bit rate is fixed), temporal resolution becomes more important than spatial resolution.
Full Text
http://jtt.sagepub.com/content/10/suppl_1/64.long
DOI
10.1258/1357633042614267
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Medical Engineering (의학공학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Emergency Medicine (응급의학교실) > 1. Journal Papers
Yonsei Authors
Park, In Cheol(박인철) ORCID logo https://orcid.org/0000-0001-7033-766X
Yoo, Sun Kook(유선국) ORCID logo https://orcid.org/0000-0002-6032-4686
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/111204
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