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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/9622

    Title: 動態影像在紅外線中傳輸與錯誤消除技術之研究;Study of Using IrDA to Transmit Dynamic Video of H.263 and Error Concealment
    Authors: 紀鈞閎;CHUN-HUNG CHI
    Contributors: 電機工程研究所
    Keywords: 動態影像;錯誤消除;紅外線;irda;video;error concealment
    Date: 2003-07-04
    Issue Date: 2009-09-22 11:51:58 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 紅外線(IrDA)傳輸在通訊的領域上應用非常廣泛,一般最常應用在檔案的傳輸,然在紅外線上有一協定稱為圖像傳輸協定(IrTran_P),IrTran_P的應用主要是在JPEG圖片的傳輸,隨著紅外線傳輸速率更加快速,且現在的科技現況使得音視訊傳輸變的更為重要,因此利用IrTran_P來傳輸音視訊資料是一種新穎的應用,不過原本的協定是不支援視訊的,如此一來就必須修改相關協定資訊,此資訊包含:連線、詢問、傳送以及斷線封包,而這篇論文主要是利用IrTran_P來傳送低位元率H.263視訊資料,H.263程式是使用Telenor Research提供的模擬軟體Tmn1.7當作範本,也為了達到即時效果在各方面程式做了一些修改;最後提及到當傳送當中受到干擾,如何去把視訊中的遺失或發生錯誤的區塊做錯誤消除,在論文中提出一空間域新的方向性錯誤消除法,它是結合改良式鄰近像素線性內挿法和方向性內挿法,其中也對方向器分類器和複雜度分析之關鍵技術做一番探討,在方向分類器中使用周圍像素判斷法比原來的梯度票選法更有效率,而此技術也使用到座標定位法來作為判斷座落哪依各區域,進而作新的方向性錯誤銷除法,最後再顯示出實驗模擬結果做討論。 IrDA is a so popular transmitted application in wireless communication and applied in the transmission of files generally. There is an application IrTran_P over it that be used to transmit JPEG pictures. With the increase of rate in IrDA, and the transmission of dynamic video is very significant in the technological time. So, we use IrTran_P to transmit H.263 is a novel application, we modified their some protocol information of connect, query, transmission and disconnect packets. This paper describes how we can transmit H.263 video data using IrTran_P protocol. We use the Tmn1.7 of H.263 simulate software that is provided by Telenor Research. In order to reach best performance in real time, we modified some changes of source code. Finally, we propose a new directional interpolation to do error concealment on broken images in this paper. It combines modified linear interpolation using nearest pixels with directional interpolation. Then, directional classifier and the block coordinates system are keys and discussed in the study. And we perform results to discuss.
    Appears in Collections:[電機工程研究所] 博碩士論文

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