A streaming protocol that never stops. Content arrives in quality layers — coarse first, refined later — so every byte already says something useful about the whole. Lose half the packets: the stream continues, just in lower precision. No ABR switching. No buffer stalls. No silence.
Data is organised by importance, not position. Layer 0 carries the coarsest decision for every coefficient. Each next layer doubles precision. Truncate at any boundary and the output is still valid.
Quality drops proportionally to loss. The stream never stops. Receivers decode whatever arrived, without requesting retransmits or switching sources.
Base layers get FEC redundancy and packet duplication. Higher layers go unprotected. The critical shape of your signal always survives. Refinement is best-effort.
Anything quantizable streams. Same protocol across every modality. Proven on audio, BIM models, event-camera feeds, sensor telemetry.
No acknowledgements, no retransmission requests. Use for satellite, multicast, emergency broadcast — any one-to-many scenario.
Endoscope and ultrasound feeds over cellular can't afford a stall. FQL keeps the signal continuous even as bandwidth fluctuates across a hospital's WiFi dead zones.
Journalists with a backpack unit on a festival rooftop. The link dies to 20% loss and SRT quits — FQL drops one layer and keeps going.
Asymmetric links, long latencies, one-way channels. FQL works without a return channel — critical for orbital and autonomous systems.
A 400 MB BIM model arrives as a first-pass silhouette in 200 ms. Engineers pan and zoom while the refinement layers land in the background.
Cloud gaming dies on micro-stalls. FQL guarantees a frame — maybe at reduced resolution — but never silence. Critical for action titles.
Start on the free tier, scale to startup and enterprise, or license the protocol directly for on-prem deployment. No surprises, no vendor lock-in.