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Ítem Digital terrestrial television measurement and coverage models comparison: Evaluation of measurements and simulations on urban enviroment for DVB-T2 signals(IEEE, 2016-06-26) Bernal, Marlon PatinoThis paper presents the measurement process of DVB-T2 signal in an urban environment, and the simulations with a coverage calculation tool able to configure specific details of digital television signals and a detailed cartography. Empirical and simulations results are compared to determine additional settings and correction factors. Additional considerations to support signal planning processes are presented.Ítem Identification of the variables causing the delay in changing channel IPTV service - State of the art(IEEE, 2012-05-16) Cadavid, Andres NavarroCurrently, the IPTV service has been able to satisfy the expectation of entertainment and interactivity demanded by the market users, the proper performance of the service involves the solution to a set of challenges inherent IP environment, such as correction loss and delay information Multicast in the signal. This article reviews the most important techniques used to solve the delay in changing channel IPTV service cataloging solutions such as invasive or not, according to the form of bond equipment and / or multicast flows for such a solution. © 2012 IEEE.