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One of the current limitations to the progress of the digital television program in Cuba is the lack of funds that the country has to acquire the receiving equipment. The above statement, along with the need to implement the analog switch-off in the national territory, has led to seek autonomous solutions. Consequently, at the Central University "Marta Abreu" of Las Villas (UCLV), a prototype of a set-top box (STB) is proposed. This highly integrated device, for digital terrestrial television signals, includes a tuning and demodulation module (NIM, Network Interface Module), a general-purpose single board computer (SBC) with an open-source operating system that allows technological independence and provides facilities for the implementation of new services with high added value. This solution is based on the design and development of an electronic circuit and its Printed Circuit Board (PCB) that serves as an interface between the SBC and the NIM, for future manufacture and commercialization in the country. To validate the technical feasibility of the proposal, the structure of the data frames must be experimentally corroborated, to latter design the software procedure dedicated to the real-time processing of the signal. It is also necessary to fulfill the timing requirements of the control, configuration and monitoring signals present in the different working modes of the Digital Terrestrial Multimedia Broadcasting (DTMB) standard, which are included in GB 20600-2006. [ABSTRACT FROM AUTHOR]