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題 名 | 應用於互動式螢幕分享之動態串流抹除碼技術=A New Dynamic Streaming Erasure Code Technology for Interactive Screen Sharing |
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作 者 | 蔡華龍; 林俊隆; | 書刊名 | 電腦與通訊 |
卷 期 | 155 2014.02[民103.02] |
頁 次 | 頁61-68 |
專 輯 | 智慧感測網路與數位匯流技術專題 |
分類號 | 448.6 |
關鍵詞 | 串流抹除碼; 螢幕分享; 視訊串流; Streaming erasure code; Screen sharing; Video streaming; |
語 文 | 中文(Chinese) |
中文摘要 | 點對點螢幕分享服務隨著 Apple AirPlay推出後,成為熱門的影音分享服務,為此, Wi-Fi Alliance訂定了新的Miracast標準。另一新興之雲端互動式螢幕分享服務則是透過 Internet將遠端伺服器執行的螢幕畫面分享至使用者,讓使用者可透過互動介面操控遠端伺服器,雲端遊戲、雲端智慧家庭、Remote Play、Thin Client及遠端桌面即是此服務之應用。螢幕分享服務由於其互動操作的應用需求,因此如何整合螢幕畫面擷取、編碼、串流、解碼及播放等技術,達到極低延遲的串流服務已成為此服務成功與否之關鍵技術,本文將針對串流抹除碼原理做詳細介紹,並提出一個可達到極低延遲之動態串流抹除碼技術,所設計之技術可依照資料重要性及網路頻寬等變化來動態調整傳輸資料之保護強度,使其可在網路狀況不佳時,提升保護強度,改善串流抹除碼的保護效能,降低資料封包傳輸所造成延遲;而在網路狀況良好時,節省串流抹除碼所需傳輸之保護位元資料。 |
英文摘要 | Screen sharing services have received extensive attention since Apple Inc. announced screen mirroring functionality, called airplay, on their products, such as iPhone, iPad and iTV. To provide screen sharing service on heterogeneous platforms and devices, Wi-Fi-Alliance also announced a peer-to-peer wireless screencast standard based on Wi-Fi direct connections. Besides, there are also many envisioned applications of screen sharing, such as cloud gamming, cloud play, remote play, thin-client, remote desktop control and so on. The key of screen sharing applications is how to provide ultra-low latency interactive streaming service by developing and integrating new ultra-low delay techniques, such as screen capture, screen video encoding/decoding and streaming. This paper addresses the ultra-low latency transmission by using a new channel code, called streaming erasure code, which can provide theoretical bound on maximum transmission delay. In this paper, the theory of streaming erasure code and the relevant research works will be introduced in detail. Then, this paper proposes a modified streaming erasure code to improve the generic streaming code by taking the priority and importance of data segments and network dynamics into account. The proposed technique can dynamically generate longer code to provide stronger protection for data packets with higher importance or priority when the network conditions become worse. On the contrary, a shorter code will be yielded for data packets with lower priority when the network conditions become better to reduce the amount of delivered data bits. |
本系統中英文摘要資訊取自各篇刊載內容。