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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/4697
Title: | 基於可適性傳輸與情境感知之自動化活動分類 Context-Aware Activity Classification with Adaptive Transmission |
Authors: | Chia-Chih Lin 林佳志 |
Advisor: | 陳銘憲 |
Keyword: | 穿戴式裝置,穿戴式攝影機,系統架構設計,行動服務應用,可適性傳輸, Wearable device,Wearable camera,Mobile app,Adaptive transmission, |
Publication Year : | 2015 |
Degree: | 碩士 |
Abstract: | 隨著各類型的穿戴式以及行動裝置不斷推陳出新,應用程式也漸趨複雜化。考量裝置資源有限,大多數現行應用程式採取雲端運算之策略將資料上傳以分攤裝置工作量;然而對於使用者而言,頻寬使用量也是必須斤斤計較的重要資源,特別在資訊量爆發的現代,傳統應用將資料全數上傳的方式將造成使用者龐大負擔而導致使用意願全失。因此,本文擬提出一套考量頻寬使用量之新型態之應用服務架構,讓應用程式得以選擇是否藉由犧牲少部分準確度以大幅降低頻寬使用量。
除此之外,我們將此架構實作於一個需要處理大量影像且長時間運行的應用服務上以驗證想法之可行性。此應用由穿戴式裝置、行動裝置與遠端伺服器組成,旨在將收集使用者日常生活訊息並自動生成一個每日圖文活動摘要。使用者將穿戴攝影裝置週期性拍攝日常生活,接著行動裝置將進行活動辨識以及篩選出具有代表性的生活照,而當行動裝置無法辨別某張照片是否具有代表性時,該照片將上傳至伺服器端進行進階分析。我們雇用4名使用者進行為期14天的實驗,其實驗結果證實透過可適性傳輸機制,行動端與伺服器端得以在選代表性照片的任務中藉由犧牲少部分精確度達成降低大量頻寬使用量之目的,大幅增加應用服務之彈性。 With the growth of innovative wearable and mobile devices, smart applications in daily life become more complicated. Most of these applications offload all data from wearable and mobile devices to remote servers to overcome the limitations of device resources. However, offloading all the data, especially multimedia contents, requires a large number of network resources and may result in the dissatisfaction of users who use such applications. To alleviate the problem, we propose a practical system architecture which includes an adaptive transmission mechanism to reduce the network bandwidth usage. We design and implement a multimedia application, which generates a diary-like daily activity summarization, with the proposed system architecture to verify the feasibility. In the experiment with four participants wearing the wearable camera for fourteen days, the results show that over 89% of the overall bandwidth usage can be reduced with sacrificing 11% of the server-side performance via the proposed adaptive transmission mechanism. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/4697 |
Fulltext Rights: | 同意授權(全球公開) |
Appears in Collections: | 電信工程學研究所 |
Files in This Item:
File | Size | Format | |
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ntu-104-1.pdf | 2.98 MB | Adobe PDF | View/Open |
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