Comcast’s Xfinity has launched RealTime4K, an ultra-low-latency, 30 Mbps upscaled 4K delivery architecture for premium live sports, debuting with Super Bowl LX and supporting Dolby Vision HDR and Dolby Atmos on specific Xfinity set-top and streaming boxes. The system uses HEVC with Dolby Vision, JPEG-XS contribution feeds, LL-DASH, CMAF origin infrastructure, and an on-prem CDN (plus public CDNs like Akamai and CloudFront for partners) to reduce end-to-end latency and improve picture quality versus traditional 4K workflows. Comcast plans to make RealTime4K its preferred model for future live 4K events and is offering compatible hardware upgrades to customers at no additional cost.