عنوان مقاله [English]
This paper is part of an academic research that, due to the importance and the status of the radio-television public service and its ups and downs, is allocated to the description extension of the concept, characteristics, historical background and causes for the formation, as well as the causes for its crisis in the last two decades of the 20th century and formulated in three sections. The first part of the paper, deals with the concept and characteristics the radio-television public service and characteristics of the public space from the point of view of communications science experts, and in the second part, the formation and historical background of this radio-television system have been raised. The third part of the paper deals with the causes of the crisis of radio-television public service, i.e. its ideological, economic, international regulation, and technological causes in the last two decades of the twentieth century, and finally, a general conclusion is the final part of the paper.