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  1. Proceedings of the 5th International Latin American Networking Conference (LANC '09)
  2. Enhancements to the opinion model for video-telephony applications
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An approach for wireless sensor networks topology control in indoor scenarios
Optimal wavelength converter allocation: a new approach based MOEA
GoalBit: the first free and open source peer-to-peer streaming network
Early traffic classification using support vector machines
Enhancements to the opinion model for video-telephony applications
Securing wireless mesh networks: a winning combination of routing and forwarding mechanisms
MONTE: an implementation of an MPLS online traffic engineering tool
A new user behaviour model and QoE determination on short-message-service
On using grid of collocated APs to improve performance of wireless VoD systems
Evaluating the impact of an acknowledgment strategy for APRP
A connection level model for IEEE 802.11 cells

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Enhancements to the opinion model for video-telephony applications

Content Provider ACM Digital Library
Author Ardao, J. Carlos López Joskowicz, Jose
Abstract In this paper, we show how the proposed model in ITU-T Recommendation G.1070 "Opinion model for video-telephony applications" cannot model properly the perceptual video quality, especially in the low bit rate range, due to the great variation of MOS values depending on video content. In this work, we present different enhancements to the model, allowing a much better approximation to the perceptual MOS values, knowing only the subjective movement content in the video application, classified in "Low", "Medium" or "High". Studies were made for more than 1500 processed video clips, coded in MPEG-2 and H.264/AVC, in bit rate ranges from 50 kb/s to 12 Mb/s, in SD, VGA, CIF and QCIF display formats. Video clips subjective quality was estimated using one of the quality metrics standardized in ITU-T Recommendation J.144 and ITU-R Recommendation BT.1683.
Starting Page 87
Ending Page 94
Page Count 8
File Format PDF
ISBN 9781605587752
DOI 10.1145/1636682.1636697
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2009-09-24
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Video perceptual quality Voip network design Video codecs Video signal processing
Content Type Text
Resource Type Article
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