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研究生:呂冠宏
研究生(外文):Kuan-Hung Lu
論文名稱:以SMIL為基礎之無線多媒體閘道器與系統平台
論文名稱(外文):SMIL-Based Wireless Multimedia Gateway Architecture And Platform
指導教授:鄭憲宗鄭憲宗引用關係
指導教授(外文):Sheng-Tzong Cheng
學位類別:碩士
校院名稱:國立成功大學
系所名稱:資訊工程學系碩博士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:英文
論文頁數:58
外文關鍵詞:FilterCC/PPCGIMultimedia PlatformWSMILSMIL
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隨著科技的進步,網際網路(Internet)的發展已臻成熟,再加上專線固接網路服務(Leased Line Access)的開放,更拉進了人們日常生活與網際網路的距離。然而,傳統文字模式的網路、文字加圖片的網路,已不足以滿足網路用戶的需求了。取而代之的是一個包含文字、圖片、聲音、動畫等的多媒體影音網路。除了固網的開放之外,無線通訊的日新月異也是不可忽視的。不管是無線應用協定(WAP)、整合封包無線電技術服務(GPRS)、無線區域網路(IEEE802.11)、甚至是藍芽(Bluetooth);而無線端的用戶裝置也從筆記型電腦、手機等發展至目前時下當紅的手機(Smart Mobile Phone)、個人數為助理(PDA)等這一類的手持式資訊家電(IA)產品。這些都在在顯示出無線通訊的無限發展性與多媒體的必要性。
針對多媒體這部分,全球資訊網協會(World Wide Web Consortium)於1998年六月正式發表一套多媒體網頁製作的標籤語言:SMIL(Synchronized Multimedia Integration Language)。目的就是要整合各自獨立的多媒體物件,使其成為一個可以同步展現的多媒體網頁。然而,這都是假設使用者是在傳統的寬頻網路與個人電腦上而設計的,即使是2001年八月的SMIL 2.0 Basic,雖然宣稱是針對資源受限裝置而制定的,但實際上還是存在著些許的問題。因此,我們發展出一套以XML為基礎的WSMIL(Wireless Synchronized Multimedia Integration Language),並制定一個包含伺服器(Server)、閘道器(Gateway)、客戶端(Client)的無線多媒體系統平台。目的就是希望在無線的環境之下,也能提供這些資源受限裝置一個可以瀏覽多媒體網頁的系統平台。
本論文將針對閘道器這一部份做詳細的介紹。說明如何將SMIL的文件轉換為WSMIL的文件,以及閘道器所提供的使用者介面為何?如何利用CC/PP來加強閘道器處理各種不同形式的異質客戶端裝置等等。在這樣的情況之下,多媒體網頁製作者、提供者只需要準備一份SMIL的檔案即可。如此,不但傳統的客戶端可以直接存取、瀏覽該SMIL檔案,而資源受限的客戶端只需要透過閘道器的輔助,同樣可以用來瀏覽該網頁,並且可藉由閘道器的幫助,來提供一個更適合資源受限裝置的環境出來。此外針對整個多媒體系統平台,包括伺服器的架設、多媒體網頁的製作;客戶端SMIL與WSMIL的瀏覽器;以及如何解析SMIL與WSMIL也會有詳細的說明。
As the web continues to grow at its rapid rate, the Internet becomes one part of human life. Especially when the leased line access becomes handier to use, life with the Internet becomes familiar too. However, today’s Web documents only with hypertext information so to speak are not enough. It also needs multimedia information such as images, audios, videos, and etc. to be a hypermedia presentation. Furthermore, network should be treated not only wired but also wireless. As we can see, today’s wireless technology contains: Wireless Application Protocol (WAP), General Packet Radio Service (GPRS), IEEE 802.11 Wireless LAN, Bluetooth, and etc. In addition, not only notebook can be the wireless device but also many information appliance devices are growing, such as Personal Digital Assistant (PDA), smart mobile phone, and etc. For this reason, to integrate multimedia with wireless becomes more important.
In June 1998 the World Wide Web Consortium released the Synchronized Multimedia Integration Language (SMIL). SMIL enables simple authoring of interactive audiovisual presentation with difference types of media combined together. However this is based on a wide band of wired. Even version 2.0 of SMIL in August 2001 that provides limited functionality on a resource-constrained device named SMIL2.0 Basic, but it still has some limited by our research. So that, we propose Wireless Synchronized Multimedia Integration Language (WSMIL) based on XML for resource-constrained devices. And propose a Wireless Multimedia Access Platform includes client, gateway, and server sides. This is because we wish to integrate those frameworks to provide friendlier interface for browsing multimedia presentation on resource-constrained devices.
In this master’s thesis, we will discuss how SMIL documents can be translate to WSMIL documents by Gateway Architecture. How Composite Capability/Preference Profile (CC/PP) can be provided information by the client device to gateway. So that, gateway can selects the appropriate document for heterogeneous client devices. By WSMIL Filter of gateway, Web content providers can only to provide one SMIL document. Not only powerful devices but also resource-constrained devices can navigate with it. Furthermore, we will also discuss the technology of Wireless Multimedia Platform, which includes server, gateway, and client side. What’s difference between SMIL and WSMIL? And how to parse and process the SMIL and WSMIL documents.
Table of Contents
Chinese Abstract ……………………………………………………………………Ⅲ
English Abstract ……………………………………………………………………Ⅳ
Acknowledgements ……………………………………………………………………Ⅴ
Table of Contents ……………………………………………………………………Ⅵ
List of Tables ……………………………………………………………………Ⅷ
List of Figures ……………………………………………………………………Ⅸ
Chapter 1 Introduction ………………………………………1
Chapter 2 Background and Related Work ………………3
2.1 XML ………………………………………………………………3
2.1.1 XML Parser ………………………………………………………7
2.2 HTML and WML ……………………………………………10
2.3 SMIL1.0 and SMIL2.0 ……………………………………………11
2.3.1 SMIL1.0 ……………………………………………………………11
2.3.2 SMIL2.0 ……………………………………………………………14
2.4 WSMIL1.0 ……………………………………………………17
Chapter 3 Multimedia Platform Technology ………………19
3.1 Server Side ……………………………………………………19
3.1.1 Web Server ……………………………………………………20
3.1.2 Streaming Server ……………………………………………21
3.2 Gateway Side ……………………………………………………24
3.2.1 Personal Gateway Unified Notification ……………………………24
3.2.2 High Availability Gateway ……………………………………26
3.3 Client Side ……………………………………………………27
3.3.1 SMIL Players ……………………………………………………27
3.3.2 WSMIL Players ……………………………………………………29
Chapter 4 Gateway Architecture …………………………31
4.1 Problems and Solutions ……………………………………………31
4.1.1 par Converting Algorithm ……………………………………32
4.2 SMIL To WSMIL ……………………………………………37
4.2.1 WSMIL2.0 ……………………………………………………37
4.2.2 Compare WSMIL with SMIL ……………………………………38
4.2.3 Card-Based Synchronization ……………………………………39
4.2.4 Navigation with par and card elements ……………………………41
4.3 WSMIL Filter with Internet ……………………………………43
4.3.1 Common Gateway Interface ……………………………………43
4.3.2 WSMIL Filter with CGI …………………………………46
4.3.3 The Processing of Hyperlink Activation ……………………47
4.3.4 WSMIL Filter with CC/PP ……………………………………48
4.4 Implementation Example ……………………………………51
Chapter 5 Conclusions ………………………………………55
References …………………………………………………56
【1】W3C Synchronized Multimedia Working Group, http://www.w3.org/AudioVideo/.
【2】The Word Wide Web Consortium (W3C), http://www.w3.org/.
【3】W3C Recommendation 15-June-1998: Synchronized Multimedia Integration Language (SMIL) 1.0 Specification, http://www.w3.org/TR/REC-smil.
【4】W3C Recommendation 07-August-2001: Synchronized Multimedia Integration Language (SMIL 2.0), http://www.w3.org/TR/smil20/.
【5】W3C Recommendation 6-October 2000: Extensible Markup Language (XML) 1.0 Second Edition, http://www.w3.org/TR/REC-xml.
【6】XML Schema was approved as a W3C Recommendation on 2-May-2001, http://www.w3.org/XML/Schema.
【7】Document Object Model (DOM), http://www.w3.org/DOM/.
【8】Simple API for XML (SAX), http://www.saxproject.org/.
【9】HyperText Markup Language (HTML), http://www.w3.org/MarkUp/.
【10】WAP Forum, Wireless Markup Language (WML), http://www.wapforum.org/.
【11】WAP Forum Specifications, http://www.wapforum.org/what/technical.htm.
【12】Apple - QuickTime, QuickTime Streaming Server, http://www.apple.com/quicktime/products/qtss/.
【13】Microsoft, Windows Media Technologies, http://www.microsoft.com/windows/windowsmedia/default.asp.
【14】RealNetwprks, Products and Services - Media Delivery, RealSystem Server, http://www.realnetworks.com/products/media_delivery.html.
【15】Linux-HA Project Web Site, http://linux-ha.org/.
【16】Qt, a product of Trolltech, http://www.trolltech.com/.
【17】Composite Capabilities/Preferences Profile Working Group Public Home Page, http://www.w3.org/Mobile/CCPP/.
【18】W3C Working Draft 15 March 2001: CC/PP Structure and Vocabularies, http://www.w3.org/TR/CCPP-struct-vocab/.
【19】W3C Note 24 June 1999, CC/PP exchange protocol based on HTTP Extension Framework, http://www.w3.org/TR/NOTE-CCPPexchange/.
【20】Devin Ben-hur, Sonia Lyris, Computer Bits “The Common Gateway Interface”, http://www.computerbits.com/archive/1996/0100/html9601.html.
【21】3GPP TS 26.233: “Transparent end-to-end packet switched streaming service (PSS); General description”.
【22】3GPP TS 26.234: “Transparent end-to-end packet switched streaming service (PSS); Protocol and codecs”.
【23】3GPP TS 23.140: “Multimedia Messaging Service (MMS); Functional description stage 2/3”.
【24】IETF RFC 2616: “Hypertext Transfer Protocol - HTTP/1.1”, Fielding R. et al., June 1999.
【25】徐鼎青 “Design and Implementation of an Universal Multimedia Access Platform” 國立成功大學資訊工程研究所碩士論文, July 2001.
【26】Åsa Viken. “Streaming: Past, Present and Future – An Investigation into the Synchronized Multimedia Integration Language 2.0 (SMIL2.0)” M. Sc. Thesis in Engineering Physics performed at Atello AB, Department of Microelectronics and Information Technology, Royal Institute of Technology, Stockholm May 2001.
【27】Philipp Hoschka. “An Introduction to the Synchronized Multimedia Integration Language” IEEE MultiMedia, October-December 1998 (Vol. 5, No. 4).
【28】Dick C.A. Bulterman. “SMIL 2.0, Part 1: Overview, Concepts and Structure” IEEE MultiMedia, October-December 2001.
【29】Dick C.A. Bulterman. “SMIL 2.0, Part 2: Example and Comparisons” IEEE MultiMedia, January–March 2002.
【30】Lloyd Rutledge. “SMIL2.0 XML for Web Multimedia” IEEE Internet Computing, September/October 2001.
【31】Takayuki Warabino, Shinji Ota, Daisuke Morikawa, Masayoshi Ohashi, Hajime Nakamura, Hideaki Iwashita and Fumio Watanabe, “Video Transcoding Proxy for 3Gwireless Mobile Internet Access”, IEEE Communications, Oct. 2000.
【32】Dapeng Wu, Yiwei Thonas Hou, Ya-Qin Zhang, “Scalable Video Coding and Transport over Broad-Band Wireless Networks”, Proc. Of IEEE, January 2001.
【33】Gero Offer, “The New Age of IN: The Intelligent Server Farm” IEEE 2000.
【34】顧思捷 “WSMIL-based Multimedia Streaming Mechanism for resource-constrained devices” 國立成功大學資訊工程學系碩士論文, July 2002
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