Radiotelevisione svizzera, officially Radiotelevisione svizzera di lingua italiana (Italian pronunciation: [ˌradjoteleviˈzjoːne ˈzvittsera di ˈliŋɡwa itaˈljaːna]; "Swiss Radiotelevision of the Italian Language"), shortened to RSI (formerly RTSI until 2009), is a subsidiary of the Swiss Broadcasting Corporation (SRG SSR), operating in Italian-speaking Switzerland.

The first TV broadcasts date back to 1958, at first produced in studios in Zürich and transmitted with Italian subtitles.

[1] In 1961, with the foundation of Televisione svizzera di lingua italiana (TSI), the studios were relocated in Paradiso, near Lugano.

In December 2005, RSI began digital broadcasts using the DAB system on the Saint Gottard autoroute.

On 26 July 2006 at 12:45, SRG SSR idée suisse interrupted analog broadcasting in Ticino making it the first all-digital canton of Switzerland.

Swiss public broadcaster SRG terminated the digital terrestrial distribution of its TV channels (DTT) via DVB-T nationwide on 3 June 2019.

SRG recommended affected households to switch to an alternative reception infrastructure, such as DTH satellite, cable, IPTV or internet streaming.