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International Journal of Digital Multimedia Broadcasting
Volume 2014, Article ID 242531, 11 pages
http://dx.doi.org/10.1155/2014/242531
Research Article

A Model for Video Quality Assessment Considering Packet Loss for Broadcast Digital Television Coded in H.264

1Universidad de la República, 11300 Montevideo, Uruguay
2Universidad de Montevideo, 11600 Montevideo, Uruguay

Received 31 October 2013; Revised 23 January 2014; Accepted 28 January 2014; Published 3 April 2014

Academic Editor: Fabrice Labeau

Copyright © 2014 Jose Joskowicz and Rafael Sotelo. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a model to predict video quality perceived by the broadcast digital television (DTV) viewer. We present how noise on DTV can introduce individual transport stream (TS) packet losses at the receiver. The type of these errors is different than the produced on IP networks. Different scenarios of TS packet loss are analyzed, including uniform and burst distributions. The results show that there is a high variability on the perceived quality for a given percentage of packet loss and type of error. This implies that there is practically no correlation between the type of error or the percentage of packets loss and the perceived degradation. A new metric is introduced, the weighted percentage of slice loss, which takes into account the affected slice type in each lost TS packet. We show that this metric is correlated with the video quality degradation. A novel parametric model for video quality estimation is proposed, designed, and verified based on the results of subjective tests in SD and HD. The results were compared to a standard model used in IP transmission scenarios. The proposed model improves Pearson Correlation and root mean square error between the subjective and the predicted MOS.