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郭楷彬- 行動裝置上即時影像傳輸系統
[ 摘要 ]
無線網路和有線網路存在著許多不同的差異性，其中 (1) 較小的頻寬 (2)不穩定的傳輸媒介 (3) 硬體設備的限制，使得無線網路上的即時多媒體影音傳輸並不是那麼容易實現。目前行動通訊網路的發展，無線網路的頻寬已經足夠讓多媒體資料在上傳輸了，如 802.11b 提供了11Mbps 的傳輸速率，以直接序列展頻(DSSS)技術，操作在2.4GHz頻帶上。而在手持或行動設備，如Pocket PC、PDA、Notebook等等，搭配了無線通訊模組後，也可以透過網際網路讓訊息流通，因此傳輸的資料型態已經不在只侷限於文字，各種的多媒體數據資料亦可進行傳輸，因此本研究利用了這樣的特性來開發行動裝置上的即時影像傳輸服務，希望藉由即時傳輸的特性，來解決更多我們在使用行動裝置上的瓶頸。
[ 英文摘要 ]
There are a lot of different differences between wireless network and wired network, among them (1)Smaller wide (2 ) unstable transmission media frequently (3)The restriction of the hardware equipment, it is not so easy to realize to transmit that the instant multimedia that makes on the wireless network is audio-visual. It is neither at present for action development, communication of network nor the getting wide and getting more enough to let by multimedia materials more already frequently in network not wireless in on transmit, if 802.11b offers the transfer rate of 11Mbps, the technology with the direct array exhibition frequently (DSSS ), operates and takes frequently in 2.4GHz. And is holding action equipment, for instance Pocket PC , PDA , Notebook ,etc., after matching. the wireless communication mould group, can let information flow by network through internet too, so materials type that transmit attitude confine characters to only already, various kinds of multimedia data materials can also be transmitted , so this researh has made use of such a characteristic to develop the instant image on the action device to transmit and serve, hope to solve more our bottlenecks in using the action device with the characteristic transmitted immediately
