Televisió de Catalunya (, known by the acronym TVC) is the public broadcasting network of Catalonia, one of the seventeen autonomous communities of Spain. It is part of the Corporació Catalana de Mitjans Audiovisuals, a public corporation created by the Generalitat de Catalunya by a Founding Act in 1983. Slightly more than half of its revenue (52%) comes from public funding through the Generalitat de Catalunya, while the remaining 48% is raised through advertising, sponsorship and merchandise and original productions' sales. It is officially composed by six channels: TV3, TV3 HD, 33/Super3, 3/24, Esport3 and TV3CAT. While the main language of all these channels is Catalan, Spanish is usually neither sub-titled nor dubbed, as it is generally accepted that all Catalan speakers are by default also Spanish speakers. Some programmes such as Polònia and APM use Spanish extensively, largely for effect. In the Aran Valley, there are programs in Aranese. TVC headquarters are located in Sant Joan Despí, near Barcelona. History TV3 started its trial broadcasts on 11 September 1983 (the National Day of Catalonia) but its regular broadcasts started a few months later, on 16 January 1984. TV3 was the first television channel to broadcast only in Catalan. In 1985, TV3 expanded its coverage to Andorra, Northern Catalonia and the Valencian Community. One year later, TV3 inaugurated its new headquarters, a 4.5-hectare facility in Sant Joan Despí, near Barcelona. Since 1987, TV3 has broadcast a second audio channel on almost all foreign-language series and movies with the original programme audio, first using the Zweikanalton system and later on using NICAM. Back on analog broadcasting, series and movies were usually broadcast in NICAM stereo, although sometimes an audio narration track for blind and visually impaired viewers is provided as well. In 1988, TV3 started a decentralisation process, first broadcasting programmes in the Aranese language for the Aran Valley and, one year later, opening branch offices in Tarragona, Girona and Lleida and creating the Telenoticies Comarques, a regional news programme broadcast simultaneously in four different editions, one for each of the four Catalan provinces. During the 1992 Summer Olympics, TV3 and TVE created the Olympic Channel, a joint network to provide coverage for the Olympic Games using Canal 33's frequency. In 1999, Televisió de Catalunya started broadcasting in the Digital terrestrial television system, and regular DTT broadcasts started in 2002. Coverage Televisió de Catalunya's terrestrial channels are available in Catalonia, its