Multimedia: Problems and Opportunities

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MultimediaProblems and Opportunities

• OZeWAI 2002

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Presenters

• John McKenna, Telstra
• Brendan Wylie, PC Ephone
• Andrew Arch, Vision Australia Foundation
• Charles McCathieNevile, W3C

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Web on the Move

• John McKenna
• Brendan Wylie

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The Web on the Move

• PC EPhone
• CDMA mobile phone
• 640x480, 256 colour, 2000dpi TFT LCD
• Windows CE
• Internet Explorer
• Pocket Word
• PIM software
• Email software
• http//www.pcephone.com.au/

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Multimedia Accessibility

• What Can Be Done(How Do We Record It)
• Andrew Arch

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What is Multimedia?

• Graphics
• GIF, JPEG, PNG
• Scalable Vector Graphics (SVG)
• Audio
• Video
• QuickTime
• Realmedia
• Interactive objects
• Flash
• Shockwave

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Accessible Multimedia

• Alt text
• Transcripts
• Multilingual audio tracks and captions
• Described images actions
• Text to speech conversion
• Multi-device access, eg. keyboard navigation

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SMIL SVG

• Synchronised Multimedia
• use for TV-like multimedia presentations
• can synch auditory tracks and transcripts
• MAGpie from WGBH is freehttp//ncam.wgbh.org/weba
  ccess/magpie/index.html
• Scaleable Vector Graphics
• describes 2-dimensional graphics in XML
• images scale, unlike GIF, JPG, PNG
• text is text, not graphics
• can consume bandwidth

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SMIL SVG

• Demonstrations
• SVG
• www.adobe.com/svg/demos/main.html
• SMIL
• ncam.wgbh.org/richmedia/showcase.html
• realnetworks.com/resources/realoneplayer/demostuto
  rials.html

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Flash

• Issues
• non-mouse access
• audio
• images and video
• interactivity
• player required
• assistive technology access
• Resources
• Macromedia accessibility

http//www.macromedia.com/macromedia/accessibility
/features/flash/
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Flash MX Player 6

• Accessibility enhancements
• Microsoft Active Accessibility
• Reveals regular text to screen readers
• JFW 4.5 WindowEyes 4.2
• Alt text and button names
• Tab order and reading order is settable
• Object grouping
• Captioned video
• Font and colour can be set
• The Learning Federation requires high levels of
  accessibility for their Learning Objects

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Cataloguing Multimedia for Accessibility

• W3C EARL
• IMS Global
• Dublin Core

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W3C EARL

• Evaluation and Report Language
• RDF based framework for recording, transferring
  and processing data about resources
• A notation for recording and sharing evaluations
• http//www.w3.org/WAI/ER/intro.html

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Dublin Core

• DC.Accessibility
• Looking for ways to use DC metadata to aid
  identifying accessible resources as part of
  resource discovery
• DC metadata is very pervasive, especially within
  Government
• DC 2002 digital libraries are there to make
  information accessible hence accessibility is an
  issue for the DCMI community
• http//www.dublincore.org/groups/access

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IMS Global - Metadata

• IEEE Learning Object Metadata (LOM) Draft
  Standard defines a set of meta-data elements that
  can be used to describe learning resources
• IMS developed a representation of the meta-data
  in XML
• Moving to convergence with DC
• Working on accessibility elements
• http//www.imsglobal.org/metadata/index.cfm

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IMS Global - LIP

• Learner Information Packaging
• Includes accessibility information such as
  learner preferences, language information,
  disability/accessibility information and
  technical/physical preferences
• XML based
• Students will be able to select materials or
  modules according to their disability profile
• http//www.imsglobal.org/profiles/primer1.html

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IMS Global - Accessibility

• Guidelines for developing accessible learning
  applications
• Text, audio, images, multimedia
• Asynchronous communication and collaboration
  tools
• Synchronous communication and collaboration tools
• Interfaces and interactive environments
• Testing and assessment
• Authoring tools
• http//www.imsglobal.org/accessibility/accv1p0/ims
  acc_guidev1p0.html

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The Learning Federation

• Accessible multimedia learning objects
• Metadata for resource discovery, including
  accessibility description
• Student profiles, including disability and
  technology
• http//www.thelearningfederation.edu.au

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Multimedia - Usability Accessibility

• Charles McCathieNeville