Modern video conferencing is an exercise in managing unforgiving real-time physics: packet arrival variation, buffer bloat, echo cancellation, and network jitter. In this technical overview, we examine how Qura Meet leverages WebRTC and LiveKit SFU infrastructure to deliver low-latency browser communication.
Mesh vs. SFU Architecture
In peer-to-peer mesh configurations, each participant sends media streams directly to every other participant. While acceptable for two-person calls, bandwidth and CPU requirements scale quadratically (O(N²)), making mesh topologies unviable beyond three callers.
Qura Meet implements a Selective Forwarding Unit (SFU) architecture. Each participant publishes their upstream audio and video streams once to the server node, which selectively forwards packets to down-link subscribers without costly server-side video transcoding.
“By routing media without decode/re-encode cycles, SFUs preserve sub-200ms latency while keeping server CPU overhead minimal.”
Browser-First Audio Engineering
Audio clarity is the single most vital component of any meeting. Video degradation is tolerated by human perception; audio jitter or clipping makes communication impossible.
We prioritize WebRTC audio tracks through dedicated Opus codec configurations, DTX (Discontinuous Transmission) during silence, and continuous acoustic echo cancellation directly in the browser runtime.
Next Steps in Performance Benchmarking
We believe in transparent engineering claims. Rather than asserting unverified bandwidth savings, our team is conducting rigorous real-world benchmarking across standard simulated network profiles (3G, 4G, packet-loss models). As data is validated, we will publish the complete testing methodology and figures publicly.
Related Perspectives
Why We Are Building Qura: Tools for the Everyday Work of India and Beyond
Software should solve real everyday friction without surveillance or artificial urgency. Why we chose an independent path focused on fundamental utility.
Engineering Principles Behind Our Tools: Physics, Latency, and Zero Bloat
From WebRTC SFU topologies to minimal client payloads: the non-negotiable engineering principles guiding software architecture at Qura Technologies.