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To solve duplicated functionality, legacy code, and scalability limits in Bilibili’s live‑streaming interaction services, the team created a unified Interaction Center that abstracts RTC, consolidates session, link, UI, scoring and role management, introduces a shared state machine and tracing, and evolves through phased, extensible architecture for higher performance and maintainability.
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This article traces the 25‑year evolution of real‑time communication (RTC) across five generations—from the early MCU era to P2P, SFU, cloud‑SFU, and the current global cloud RTC stage—highlighting key protocols, architectural shifts, advantages, drawbacks, and emerging AI‑driven media processing techniques.
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At a Cloud+ Community salon on June 29, nearly 300 developers heard Tencent Cloud detail mobile co‑hosting live streaming, P2P‑accelerated CDN, globally distributed overseas streaming architecture, RTC‑to‑PSTN integration, and AI‑driven video services such as recognition, moderation, compression, editing, and highlight extraction.
This technical sharing session by a senior audio‑video engineer from 360 Video Cloud explains core concepts of video and audio, their encoding pipelines, media processing techniques, streaming protocols, and the challenges and key technologies behind real‑time communication (RTC).
The article chronicles how Tencent Video Cloud built a low‑latency audio/video SDK for WeChat mini‑programs—using live‑pusher and live‑player components to capture, process, encode, and transmit streams via TCP/UDP, adding echo cancellation, QoS, and room‑based signaling to enable real‑time chat and multi‑party conferencing within a 500 ms end‑to‑end delay.