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ThinkMind // eTELEMED 2013, The Fifth International Conference on eHealth, Telemedicine, and Social Medicine // View article etelemed_2013_13_30_40226


High Quality Region-of-Interest Coding for Video Conferencing based Remote General Practitioner Training

Authors:
Manzur Murshed
Md. Atiur Siddique
Saikat Islam
Mortuza Ali
Guojun Lu
Elmer Villanueva
James Brown

Keywords: Region-of-interest; video coding; video conferencing

Abstract:
In a video conferencing based remote teaching system, visual quality is of critical importance, specially when it is used for medical training. However, transmission of high quality video data requires substantial amount of bandwidth. Unfortunately, communication systems in remote areas suffer from low transmission rate which demands significant compression of videos at the expense of visual quality. To strike a balance between the requirements of high visual quality and high compression ratio, in this paper, we propose to achieve higher visual quality only in the area of critical importance of a video known as {em Region of Interest} (ROI). In the proposed scheme, the increase in the bit rate due to the improved visual quality in ROI is compensated with a degradation in the visual quality of non-ROI so that the effective bit rate meets the available bandwidth constraint. One of the salient features of the proposed method is that it operates outside the rate-distortion optimization (RDO) process of standard video codecs and thus ensures easy integration of the scheme into existing video coding standards and devices. Experimental results demonstrated that the proposed scheme significantly improves the visual quality of ROI without much degradation of the overall visual quality.

Pages: 240 to 245

Copyright: Copyright (c) IARIA, 2013

Publication date: February 24, 2013

Published in: conference

ISSN: 2308-4359

ISBN: 978-1-61208-252-3

Location: Nice, France

Dates: from February 24, 2013 to March 1, 2013

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