在即時資訊需求日益提升的數位時代，影像直播技術廣泛應用於新聞播報、體育賽事、宗教活動及災害應變等場域，對於「穩定性」、「畫質」與「網路獨立性」之需求亦日益嚴苛。惟當地面行動網路於人潮擁擠或地形遮蔽嚴重之環境中出現頻寬壅塞或訊號中斷，即時影像傳輸將面臨重大挑戰。
本研究針對上述問題，提出一套結合高軌（GEO）與低軌（LEO）衛星通訊技術、無線圖傳設備與高增益圓極化陣列天線的高機動性直播系統，並聚焦於三大核心模組進行系統化規劃與性能優化：其一，圖傳天線模組採1×2與升級版1×4圓極化陣列設計，以提升傳輸距離與抗干擾能力；其二，衛星終端模組整合V60E（KU頻段自動追星系統）與C700（L頻段備援設備），並設計專用車載治具平台，強化移動部署穩定性；其三，串流模組導入H.265與日本Hytec Inter製LLC-4000高效壓縮技術，以應對250 Kbps極低頻寬條件下仍維持720p/30FPS畫質直播。
本系統於2024年正統鹿耳門聖母廟元宵節與媽祖遶境進行多場域實地測試，涵蓋靜態、高遮蔽、多路徑與高速移動等複雜情境。實測結果顯示，1×4圓極化陣列天線最遠穩定傳輸距離達400公尺，明顯優於傳統線性與1×2圓極化陣列天線結構；V60E在時速30公里內可維持穩定連線，車載平台三日直播期間在14處穩定連線直播；壓縮模組則成功在低頻寬下達成高畫質與低延遲傳輸，整體系統展現高韌性、高可靠性與高度可用性。
本研究不僅建構一套可於地面網路失效環境中獨立運作之衛星直播系統，更透過模組化設計與跨場域測試驗證其可行性，對未來在災害通訊、宗教遶境、偏鄉教學與大型戶外活動等應用場景提供具體技術支撐。

This research presents a satellite-based mobile live streaming system specifically designed to address the limitations of terrestrial mobile networks in real-world environments characterized by high user density, infrastructure gaps, or geographical constraints. During large-scale public events, emergency responses, or remote field operations, traditional 4G/5G networks often encounter network congestion, signal attenuation, and inconsistent coverage, resulting in dropped frames, resolution degradation, or complete disconnection from the video feed. These issues significantly undermine the quality and reliability of live streaming services, especially when immediate, high-quality communication is critical. To mitigate these limitations, the proposed solution integrates three key components: custom-designed circularly polarized antenna arrays, dual-band satellite terminals for primary and backup communication, and a low-bitrate adaptive video compression module. These components work together to deliver a robust, mobile, and scalable solution for high-definition video broadcasting over satellite links. Field tests conducted in various locations in southern Taiwan, including major public gatherings, confirmed the system’s ability to maintain stable 720p/30FPS video transmission at bandwidths as low as 250 Kbps, even under dynamic and bandwidth-constrained conditions. The results demonstrate the practical viability of satellite-supported mobile broadcasting systems and their potential to bridge communication gaps in underserved or congested areas.

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