In our previous post we explained why Castanet chose a hybrid ATSC 3.0 / 5G Broadcast architecture: it is fully compliant with existing FCC Broadcast Internet rules, aligned with 3GPP standards, and ready for the coming wave of 5G Broadcast-capable handsets. This follow-up goes deeper into how that architecture actually works — and highlights the specialized co-innovation partners whose technology made the world’s first live hybrid deployment possible. The Core Technical Chal

For years the industry framed a false choice: ATSC 3.0 or 5G Broadcast. One path protected existing broadcast investments and local service. The other aligned with the global mobile ecosystem and promised ubiquitous receivers in future smartphones. Castanet rejected the dichotomy. We built the hybrid that turns “or” into “and.” Our approach time-multiplexes ATSC 3.0 and 5G Broadcast onto the same RF channel—typically a 6 MHz Low-Power TV (LPTV) allocation. The result is a sin

This is the first in a series of updates from inside Castanet as we build the broadcast internet layer the digital economy is missing. In June we published something unusual for a company at our stage. Not a product announcement. Not a fundraising press release. A manifesto. A statement of what we believe about media, content and creators, about the broken economics of how content reaches people today — and what we think comes next. The response surprised us. Not because peop

Today, we are proud to release our founding manifesto — a declaration of what’s broken in today’s digital, broadcast and media ecosystem and a clear vision for what comes next. Why Now? The internet that carried us through the last thirty years is hitting its limits. Video traffic continues to explode. AI-generated and AI-augmented media are emerging at breakneck speed. Creators and audiences alike are frustrated by gatekeepers, rising costs, buffering, data caps, and platfor