Influence of distortions of key frames on video transfer in wireless networks

TL;DR

This paper demonstrates that improving video quality over wireless networks requires specific modifications to the communication scheme, including packet management and duplication strategies, supported by a mathematical model for different standards and codecs.

Contribution

It introduces a novel approach to enhance wireless video transfer by modifying packet handling and provides a mathematical model for assessing video quality across standards and codecs.

Findings

Packet duplication of key frame data improves video quality.

A mathematical model for video quality in wireless networks was developed.

Experimental techniques enabled accurate data collection for model validation.

Abstract

In this paper it is shown that for substantial increase of video quality in wireless network it is necessary to execute two obligatory points on modernization of the communication scheme. The player on the received part should throw back automatically duplicated RTP packets, server of streaming video should duplicate the packets containing the information of key frames. Coefficients of the mathematical model describing video quality in wireless network have been found for WiFi and 3G standards and codecs MPEG-2 and MPEG-4 (DivX). The special experimental technique which has allowed collecting and processing the data has been developed for calculation of values of factors.