In this paper, we examine the possible coexistence of Ginga and HbbTV as interactive TV (iTV) systems in the Brazilian and European broadcasting systems, ISDB-Tb and DVB, respectively. We compare both systems architectures, in particular with respect to their functional modules. Our analysis provides the necessary information to assess the possibilities of a joint framework that includes both Ginga and HbbTV, consequently leading to a potential foundation of a system that supports both Ginga and HbbTV applications.