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Blog Series 6 - What Castanet Delivers: D2D OTT Video on Demand at Broadcast Scale
In previous posts we described Castanet 5G Broadcast Internet at a high level and then focused on live streaming. This post turns to the other dominant video workload: OTT video on demand delivered directly to consumer devices at consistent quality, without friction. For many OTT platforms, VOD is both the growth engine and the margin problem. Traditional unicast CDNs get more expensive as audiences grow. Castanet is built to flip that model: OTT without the OTT tax. Content
alexanderrenz
Sep 54 min read


Blog Series Post 5 - Live Streaming at Castanet 5G Broadcast Quality, Cost and Scale
In our earlier post, “What Castanet Delivers,” we outlined the high-level value of the Castanet 5G Broadcast Internet: a direct-to-device (D2D) network that delivers live events, video-on-demand, and AI-generated content across mobile and fixed endpoints with flat costs and consistent quality. This post focuses specifically on “live streaming” — the use case where the limitations of today’s unicast internet are most visible and most expensive. The Unicast Problem: Success Is
alexanderrenz
Aug 273 min read


Blog Series Post 4 - What Castanet Delivers
Castanet is Deploying an End-to-End Integrated Solution Delivering Direct-to-Device 5G Broadcast Internet Services at Scale, Highest Quality, and Lowest Latency. In previous posts we explained the technical foundation of the Castanet hybrid ATSC 3.0 / 5G Broadcast architecture and the co-innovation partners who helped make the world’s first live implementations of the Castanet 5G Broadcast Internet possible. This post answers the more fundamental question: What is Castanet ac
alexanderrenz
Aug 153 min read


Blog Series Post 3 - Video on Demand over Satellite (VoDoS)
Castanet's Satellite Contribution Network Feed and Standalone Wholesale Service In earlier posts we described the hybrid ATSC 3.0 / 5G Broadcast terrestrial layer and the standalone 5G Broadcast Internet service that delivers live events, video-on-demand, and AI-generated content directly to consumer devices. This post focuses on a foundational piece of the full Castanet system: VoDoS (Video-on-Demand-over-Satellite) is both a powerful standalone wholesale service and the cri
alexanderrenz
Aug 93 min read


Blog Series Post 2 - Inside the Hybrid: How Castanet and our Co-Innovation Partners Built the World’s First ATSC 3.0 + 5G Broadcast Internet
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
alexanderrenz
Aug 24 min read


Blog Series Post 1: Building the Broadcast Internet - Why Castanet Chose Hybrid ATSC 3.0 + 5G Broadcast
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
alexanderrenz
Jul 253 min read


We published a Manifesto. Now We're Going to Live It.
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
alexanderrenz
Jul 193 min read


Castanet Manifesto: The 5G Broadcast Internet Begins
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
alexanderrenz
Jul 92 min read


You Can't Get Closer to the Consumer Than This!
Your smartphone isn’t just a device; it’s an extension of you. It’s the last thing you touch before sleep, the first you grab at dawn. It holds your passions, your playlists, your bets on the big game. Now, imagine content creators—podcasters, sports leagues, live entertainers, gaming studios, AR/VR innovators—reaching you directly on that 5G Multicast Broadcast (MBS) smartphone, in pristine quality, at breakthrough cost, with no gatekeepers. This is the promise of Castanet’s
alexanderrenz
Jun 9, 20253 min read


Castanet's 5G Broadcast Internet: The Genesis of a Galaxy of Opportunity
Imagine a world where the digital rivers of data no longer trickle through the narrow, congested pipes of last-mile access networks but cascade freely in a torrent of high-quality, low-cost bandwidth directly to your devices. A world where the cost per gigabyte plummets while the resolution soars, where latency vanishes into the ether, and where OTT content platforms, live event streamers, hyper-scalers, network operators, Internet Service Providers (ISPs), content creators a
alexanderrenz
Jun 7, 20257 min read


Revolutionizing Content Delivery with Castanet 5G Broadcast Internet
In the rapidly evolving landscape of online content delivery, advancements in technology are constantly reshaping the way we consume media. One such groundbreaking project that is poised to revolutionize content delivery networks is Castanet 5G Broadcast Internet. This innovative system is designed to cater to a wide range of content, including on-demand video, live sports streaming, gaming, and AR/VR experiences, all delivered directly to 5G MBS devices. The primary goal of
alexanderrenz
May 18, 20252 min read


How Content Owners Monetize Audiences with Castanet
In the rapidly evolving digital media landscape, the emergence of the Castanet 5G Broadcast Internet signifies a paradigm shift towards a more efficient and cost-effective way of delivering content. With its focus on providing on-demand video, interactive live sports streaming, and generative AI content directly to 5G MBS devices, Castanet revolutionizes the way content is distributed and consumed. The unmatched economics of the Castanet 5G Broadcast Internet creates a compel
alexanderrenz
May 18, 20253 min read
Embrace the Future!
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