transcoding.ppt

Subproject 4: HTML-WML Transcoding System Jia-Shung Wang Computer Science Department National Tsing Hua University March 27, 2001

Outline ,[object Object],[object Object],[object Object],[object Object]

Information Appliances ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Motivation ,[object Object],[object Object],[object Object]

Issues ,[object Object],[object Object],[object Object],[object Object],[object Object]

Demos of Transcoding ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Discussions ,[object Object],[object Object],[object Object],[object Object]

Usage of Browsing Behavior ,[object Object],[object Object],[object Object]

Usage of Browsing Behavior (cont’d) ,[object Object],[object Object]

Related Works Transcoding Proxy of IBM alphaWorks ,[object Object]

Related Works Intel Quick Web Technology ,[object Object],[object Object]

Related Works Spyglass Prism ,[object Object],[object Object]

Related Works Proxy Architecture for Efficient Web Browsing over Cellular Networks ,[object Object],[object Object]

Comparisons between HTML and WML ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Examples of HTML and WML WML <wml> <deck> <card> <p> <do type="accept"> <go href="#card2"/> </do> This is the first card... </p> </card> <card id="card2"> <p> This is the second card. </p> < /card > </deck> </wml> HTML <html> <head> <title> Example page. </title> </head> <body> <h1> This is a headline. </h1> <p> This is a paragraph. </p> </body> </html >

System Overview Web Server Multimedia Content Translation Server WML Generator WML WML Browser Etc. HTTP HTML Parser WAP HTML-WML Translator HTML, WML Documents HTTP CGI Scripts etc. Client

Features ,[object Object],[object Object],[object Object],[object Object]

Translation Server: Components and Flow Network Protocol Proxy HTML Parser Filter Document Analyzer Decks & Cards WML Generator Link Builder Request Request Response Response

Components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Components (cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Components (cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

HTML to WML Conversion Tools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

HTML to WML Conversion Strategies ,[object Object],[object Object],[object Object],[object Object],[object Object]

HTML to WML Conversion Strategies (cont’d) ,[object Object],[object Object],[object Object],[object Object]

Original Document <document> <table> <table> <table> < section 4> <section 1> <section 2> < section 3> <content 1_1> <content 1_2> <content 4_1> <content 2_1> <content 2_2> <content 2_3> <content 2_4> <content 3_5> <content 3_6> <content 3_7> <content 2_5> <content 3_1> <content 3_2> <content 3_3> <content 3_4>

Tables to Lists <document> <deck> <content 1_1> <content 1_2> <content 2_1> <content 2_2> <content 2_3> <deck> <deck> <content 2_4> <content 2_5> <content 3_1> <content 3_2> <content 3_3> <content 4_1> <content 3_5> <content 3_6> <content 3_7> <content 3_4>

One Table One Deck <document> <deck> <content 1_1> <content 1_2> <content 2_1> <content 2_2> <content 2_3> <deck> <deck> <content 2_4> <content 2_5> <content 3_1> <content 3_2> <content 3_3> <content 4_1> <content 3_5> <content 3_6> <content 3_7> <content 3_4> <deck> <deck>

Preview First <document> <deck> <content 1_1> <content 1_2> <content 2_1> <content 2_2> <content 2_3> <deck> <deck> <content 2_4> <content 2_5> <content 3_1> <content 3_2> <content 3_3> <content 4_1> <content 3_5> <content 3_6> <content 3_7> <content 3_4> <deck> <deck>

Strategy Evaluation ,[object Object],[object Object],[object Object]

Evaluation of Searching After Translation Preview First One Table One Deck Tables to Lists Good Best Worst User Friendly S/2C S/2 N/2 Average Deck Access Time

Performance Evaluation 5.4% 57.2% 16,891 7.4% 46.7% 11,232 3.5% 22.0% 7,440 280,727 8,325 21,203 126,740 6,137 17,937 176,361 9,471 24,359 Experiment #1 Experiment #2 Experiment #3 Headers Text Source (bytes) Images (bytes) With Images Without Images Reduction HTML Pages WML Decks (bytes) 25.2% 40.3% 12,062 17,966 20,363 9,568 Experiment #4

Performance Evaluation (Experiment #1: What’s WAP ) Preview Deck 1 Deck 3.2 Deck 3.1 What’s WAP Preview Deck 3 Deck 2 Deck 1 WAP Forum

Performance Evaluation (Experiment #2: NTHU Web Page) Preview NTHU Preview Deck 1 Preview Deck 1 Deck 2.1 Deck 2.2 Current Status Preview Deck 1 Deck 2.1 Deck 2.2 History Deck 3.1 Deck 3.2 About NTHU

Performance Evaluation (Experiment #3, NTHU CS Web Page) Preview Deck 1 Deck 3.2 Deck 3.1 Faculty Preview Deck 1 NTHU CS Deck 3.4 Deck 3.3 Deck 3.6 Deck 3.5

Performance Evaluation (Experiment #4, IETF Web Page) Preview Deck 1 IETF Preview Deck 1 Deck 2.1 Deck 2.2 Internet-Drafts Preview Deck 1 Deck 2.2 Deck 2.1 Internet-Drafts Index Deck 2.4 Deck 2.3 Deck 2.5 Preview Deck 1 Deck 2.2 Deck 2.1 DNSOP Deck 2.4 Deck 2.3 Deck 2.5

Implementation ,[object Object],[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

transcoding.ppt

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