EP364 ｜系統設計懶懶學 – 面試必考！Zoom 視訊會議系統如何支撐百萬人同時在線？揭秘低延遲架構設計的關鍵心法

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🚀 特別感謝贊助本集節目由 VoAI 絕好聲創提供技術支援。 🎤 VoAI 提供最有「台灣味」的 AI 聲音，支援情感語音、台式口音，甚至能一鍵生成虛擬人！ 🎁 AI懶人報聽眾專屬優惠： 👉 輸入優惠碼 AILRB26 立享 95 折！立刻體驗：https://www.voai.ai/ 這集我們要拆解視訊會議龍頭 Zoom 的底層架構。全球數億人同時在線上開會，到底要怎麼做，才能讓畫面在 200 毫秒內順暢傳輸，又不讓網路塞爆呢？ 💡 伺服器負責轉發而非運算 👉 把編解碼這種吃資源的任務丟給使用者的裝置，伺服器只負責把封包送到對的地方，這樣才能撐起大規模的即時連線。 💡 捨棄 TCP 改用 UDP 👉 即時通訊為了畫面流暢，寧可畫面偶爾出現一點點馬賽克，也不能為了等待重傳封包而讓整場會議卡住。 💡 透過 Simulcast 解決網路差異 👉 讓發送端同時傳送多種畫質的影像，伺服器就能根據每個人的網路狀況，自動派送最適合的畫質，讓大家都能順順開會。 💡 SFU 串聯架構分散壓力 👉 把伺服器節點分散到世界各地，透過串聯的方式處理媒體流，不只解決了頻寬限制，還把跨國傳輸的延遲降到最低。 📎 參考資料： Zoom System Design | WhatsApp / FB Video Calling System Design | System Design Interview Question（2020/5/21・129,242 views） https://www.youtube.com/watch?v=G32ThJakeHk 24: Video/Conference Calling (Zoom) | Systems Design Interview Questions With Ex-Google SWE（2024/5/25・16,679 views） https://www.youtube.com/watch?v=7KO7o55dcuw How Zoom handles Video-Calls? System Design Charcha with @gkcs（2024/4/7・20,716 views） https://www.youtube.com/watch?v=cgRo7196JCY System Design Behind Multi-Conference Video Calls - WebRTC vs SFU vs MCU（2026/1/4・38,452 views） https://www.youtube.com/watch?v=Zaz6hYVm-WE 歡迎請我喝杯咖啡，幫助我繼續把節目做得更好唷～！ 👉 https://buymeacoffee.com/ailanrenbao -- Hosting provided by SoundOn

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EP364 ｜系統設計懶懶學 – 面試必考！Zoom 視訊會議系統如何支撐百萬人同時在線？揭秘低延遲架構設計的關鍵心法

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