The packet loss effect is a vital factor in evaluating the efficiency of a packetization process; the study of the sensitivity of a signal to error is a prior stage to packing the signal frames for later transmission. This paper incorporates the study of error sensitivity of an H.261 encoded video signal and proposes a Dynamic Priority Algorithm (DPA) to improve the Quality of Service (QoS) of a video signal subjected to information loss. Subjective and objective results are provided before and after DPA has been applied. SNR is used to evaluate the quality objectively.
Abdul H. Sadka was born in 1968, in Tripoli Lebanon. He got his BSc in Computer & Communication engineering from the American University of Beirut in Aug. 1990. He then worked for one year with Trisat Communication as a site engineer where he installed more than 50 SMATV systems for large sites and headends. In 1991, he joined the department of computer enginnering at the middle east technical university in Ankara where he got his MSc degree in Computer Engineering. He is currently a phD research student in the department of Electrical & Electronic Engineering at the Univ. of Surrey, England. His main areas of interest are packet radio networks, packet protocol implementation and evaluation, WAN network design and data communication applications. Abdul is the ip-address coordinator of the 44-ampr subnetwork in Turkey.