Hand a new transcoding technique for pda browsers
Download
1 / 19

HANd : A New Transcoding Technique for PDA Browsers - PowerPoint PPT Presentation


  • 83 Views
  • Uploaded on

HANd : A New Transcoding Technique for PDA Browsers. Enrique Costa Montenegro Departamento de Ingeniería Telemática ETSI Telecomunicación Universidad de Vigo, Spain [email protected] Introduction. HANd: Hierarchical Atomic Navigation New transcoding technique for WWW navigation on PDA

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' HANd : A New Transcoding Technique for PDA Browsers' - munin


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Hand a new transcoding technique for pda browsers

HANd:A New Transcoding Technique for PDA Browsers

Enrique Costa Montenegro

Departamento de Ingeniería Telemática

ETSI Telecomunicación

Universidad de Vigo, Spain

[email protected]


Introduction
Introduction

  • HANd: Hierarchical Atomic Navigation

  • New transcoding technique for WWW navigation on PDA

  • Keeps all original information

  • One navigator page and several atomic pages

  • Replaces unreadable elements by icons


Hand philosophy
HANd philosophy

  • Fragmentation of original page into zones

  • Zones are sets of elements (pictures, links, text, tables...)

  • Only one zone is displayed at original scale

  • Navigator page: a reduced overview of the original page, with links to atomic pages

  • Atomic pages: readable elements or zones, pieces of the original page


Hand philosophy ii
HANd philosophy (II)

  • Representations of elements

    • Reduced version: if readable

    • Representative icon: if reduced element or zone is unreadable

  • Dependence between elements: an element is unreadable if all its descendants are unreadable

  • Navigation page: representatives in the same relative locations of original elements







Hand page generator
HANd page generator

  • Two stages

    • Preprocessing stage

    • Conversion stage


Hand page generator ii
HANd Page Generator (II)

  • Preprocessing stage

    • Input: HTML documents

    • Conversion of HTML to XHTML using Jtidy

    • Obtain DOM tree from XHTML using a DOM parser

    • DOM tree: representation of XHTML document as a tree of nodes, each node is an element of the XHTML document


Hand page generator iii
HANd Page Generator (III)

  • Conversion stage

    • Input: DOM Tree

    • Apply visibility and transformation rules to DOM Tree

    • Obtain new DOM trees

    • Convert new DOM trees to navigation page and associated atomic pages


Transformation rules readability
Transformation rules: readability

  • A PDA-to-PC screen area ratio is calculated, R<1, used to reduce elements

  • Text: new font area is calculated, move to atomic page if not readable

  • Images: new size is calculated, if original picture is small enough, it wont be resized

  • Readability threshold, label unreadable elements with 1, 0 otherwise


Transformation rules pruning
Transformation rules: pruning

  • Labels are propagated across the DOM tree

  • Branches without 0 labels are pruned


Transformation rules results
Transformation rules: results

  • Nodes with label 0 (readable) are substituted with reduced representatives

  • Nodes with label 1 (unreadable) are replaced by an icon, with a link to the atomic page with the original information

  • Adjacency rule: all adjacent icons associated to elements of the same type are represented by a single icon



Conclusions
Conclusions

  • HANd: New Transcoding Technique for PDA

  • Advantages

    • No information loss: all elements in atomic pages

    • Navigator page: readable overview of the original page

    • Valid for all WWW documents and navigators


Questions
Questions!!

Example:

What is the ´d´ in HANd?



ad