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Main Page
Last update on 03/June/2013 - included
additional results for H.264 video subject to transmission
losses over IP networks.
Overview
The material published in this site is the result of
subjective video quality assessment tests that have been
performed in IST - Technical University of Lisbon and
ISCTE-IUL since April /
2008. Video sequences displayed in the tests have been
encoded using H.264 and MPEG-2 encoders. Two different types
of artifacts have been considered: artifacts due to lossy encoding
and artifacts due to packetized video transmission over
error-prone networks.
The main goal of those tests was to obtain truth data
useful for the development and evaluation of no-reference
video quality metrics.
Accessing the material
Access to the subjective quality data is free. However, the
copyright notice must be respected (see below).
If you use this
site's material in your research, we
kindly ask that you reference this website
and/or acknowledge our team
(listed below).
Team
The subjective experiments have been
designed and supervised by:
Additional Information
Additional information on the subjective test experiments
(as well as applications) can be found in the following papers:
- T. Brandão and M.P. Queluz, "No-reference
quality assessment of H.264/AVC encoded video", IEEE
Trans. on Circuits and Systems for Video Technology, Vol.
20, No. 11, pp. 1437 - 1447, November, 2010;
- T. Brandão and M.P. Queluz, "No-reference
perceptual quality metric for H.264/AVC encoded video",
Proc. of International Workshop on Video Processing and
Quality Metrics for Consumer Electronics - VPQM,
Scottsdale, United States, January, 2010;
- T. Brandão, L. Roque and M.P.
Queluz, "Quality
assessment of H.264/AVC encoded video", Proc of Conf.
on Telecommunications - ConfTele, Sta. Maria da Feira,
Portugal, April, 2009.
Copyright notice
Permission is hereby granted, without written agreement and
without license or royalty fees, to use the contents provided
in this site for research purposes
only. In no event shall Instituto de
Telecomunicações be liable to any party from
direct, indirect, special, incidental, or consequential
damages arising out of the use of the data and its
documentation. Instituto de Telecomunicações
specifically disclaims any warranties.
The data provided hereunder is on an "as it
is" basis and Instituto de
Telecomunicações has no
obligation to provide maintenance,
support, updates, enhancements, or modifications.
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