This paper addresses methodology and tools applied to the monitoring of accessibility services in digital television at a time\r\nwhen the principles of accessibility and design are being considered in all new audiovisual media communication services. The\r\nmain objective of this research is to measure the quality and quantity of existing accessibility services offered by digital terrestrial\r\ntelevision (DTT). The preliminary results, presented here, offer the development of a prototype for automatic monitoring and a\r\nmethodology for obtaining quality measurements, along with the conclusions drawn by initial studies carried out in Spain. The\r\nrecent approval of the UN Convention on the Rights of Persons with Disabilities gives special relevance to this research because it\r\nprovides valuable guidelines to help set the priorities to improve services currently available to users.
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