Comcast today announced that it will launch a 4K ultra high-definition (UHD) set-top box later this year as it brings the Xfinity in UHD catalog to the X1 platform. The new X1 set-top box, the Xi4, will deliver Xfinity TV customers 4K UHD content—four times the resolution of high-definition—directly to the television, enabling X1 customers to enjoy unlimited virtual 4K linear channels by creating personalized playlists from the Xfinity in UHD library. Customers will also enjoy high dynamic range (HDR) programming—increased color, contrast and brightness—with the launch of a new HDR set-top box, the Xi5, next year.

“With Xfinity in UHD, our customers can easily and seamlessly enjoy some of the best 4K programming available today as part of their subscription with no additional equipment or costs,” said Matt Strauss, Executive Vice President and General Manager of Video Service for Comcast Cable. “We are committed to providing the highest-quality entertainment experiences across platforms and our next-generation set-top boxes deliver on that promise—providing our customers with UHD and HDR programming on the biggest screen in the home.”

Comcast will add hundreds of titles to the Xfinity in UHD catalog and library, including films originally produced for IMAX® and other Giant Screen Theaters from K2 Communications and Havoc TV like The Ultimate Wave TahitiAntarcticaRocky Mountain ExpressFighter Pilot and Dinosaurs: Giants of Patagonia. Full current seasons of hit TV shows such as Syfy’s Defiance; USA’s Playing House,Satisfaction and Suits; and original programming from STARZ including Outlander and Power will also be included.

Initially launched last year on 2014 Samsung UHD TVs, Xfinity in UHD offers one of the biggest and best 4K libraries available today, providing Xfinity TV customers with on demand access to full current seasons of some of the season’s hottest shows, Giant Screen films and more at no additional cost.