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6 multimedia elements - www

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  • 1. WWW – History and Development
    http://webdesign.about.com/cs/historyofhtml/a/aawebhistory.htm
    http://www.walthowe.com/navnet/history.html
    http://en.wikipedia.org/wiki/Www
    http://en.wikipedia.org/wiki/Web_2.0
  • 2. WWW – History and Development
    appropriate usage
    http://www.w3.org/
    “The social value of the Web is that it enables human communication, commerce, and opportunities to share knowledge. One of W3C's primary goals is to make these benefits available to all people, whatever their hardware, software, network infrastructure, native language, culture, geographical location, or physical or mental ability.”
    “W3C's vision for the Web involves participation, sharing knowledge, and thereby building trust on a global scale.”
  • 3. WWW – History and Development
    appropriate usage
    Common sense.
    Follow laws of the country. (No online gambling in the US)
    Behaviour
    Copyright
    Age restrictions
  • 4. WWW – History and Development
    targeted audience
    The www if for everyone.
    However, different sites (content) will be aimed at different people.
    What problems may arise here?
  • 5. WWW – History and Development
    Age Controls
    Examples?
    http://www.shocktillyoudrop.com/news/topnews.php?id=10988
    Credit Card / License
    Problems with these methods?
  • 6. WWW – History and Development
    censorship:
    violence
    sex
    Language
    These issues have been in the news recently.
    R18 classification for video games.
    Government controlled mandatory internet filter proposed for 2010.
    Discuss.
  • 7. WWW – History and Development
    Censorship
    is the suppression of speech or deletion of communicative material which may be considered objectionable, harmful, sensitive, or inconvenient to the government or media organizations as determined by a censor.
    http://en.wikipedia.org/wiki/Censorship
    The Australian Communications and Media Authority (ACMA) maintains a blacklist (sites that cannot be viewed).
    http://www.efa.org.au/Issues/Censor/cens1.html
  • 8. WWW - Implications
    Using the technical knowledge you have on these issues, look at how they relate to their use on the Web.
    Text
    Graphics
    Video
    Audio
  • 9. WWW - Implications
    Text
    font compatibility, font sets, font substitution
    text as a graphic element
    embedded text, eg:
    open type
    True type
    Def:
    http://www.dq.winsila.com/miscellaneous/postscript-vs-truetype-vs-opentype-know-the-difference.html
  • 10. WWW
    CSS – Cascading Style Sheets
    is a style sheet language used to describe the presentation semantics (that is, the look and formatting) of a document written in a mark-up language. Its most common application is to style web pages written in HTML and XHTML.
    CSS is designed primarily to enable the separation of document content (written in HTML or a similar mark-up language) from document presentation, including elements such as the layout, colours, and fonts. This separation can improve content accessibility, provide more flexibility and control in the specification of presentation characteristics, enable multiple pages to share formatting, and reduce complexity and repetition in the structural content (such as by allowing for tableless web design).
    http://en.wikipedia.org/wiki/Css
  • 11. WWW
    Hyperlink
    is a reference to a document that the reader can directly follow, or that is followed automatically. The reference points to a whole document or to a specific element within a document. Hypertext is text with hyperlinks.
    • Scroll Bar and Buttons
    • 12. is a graphical object in a GUI with which continuous text, pictures or anything else can be scrolled.
    • 13. A defined area of the screen, usually designed to look like a pushbutton, which, when clicked with a mouse, will perform a given action, usually represented by an Icon on the button face.
  • WWW
    Drop Down List
    Animated Text
    Scrolling
    Distorting
  • 14. WWW
    .PDF Files
    Portable Document Format (PDF) is a file format created by Adobe Systems in 1993 for document exchange. PDF is used for representing two-dimensional documents in a manner independent of the application software, hardware, and operating system. Each PDF file encapsulates a complete description of a fixed-layout 2D document that includes the text, fonts, images, and 2D vector graphics which compose the documents.
  • 15. WWW - Implications
    Graphics
    file size and compression, eg: (lossy/lossless)
    GIF
    JPEG
    PNG
    Think about what formats would be best suited for internet use and why?
  • 16. WWW
    Progressive loading of images:
    interlaced GIF
    is a GIF image that seems to arrive on your display like an image coming through a slowly-opening Venetian blind. A fuzzy outline of an image is gradually replaced by seven successive waves of bit streams that fill in the missing lines until the image arrives at its full resolution. Among the advantages for the viewer using 14.4 Kbps and 28.8 Kbps modems are that the wait time for an image seems less and the viewer can sometimes get enough information about the image to decide to click on it or move elsewhere. For users with faster connections, there is little difference in effect between an interlaced GIF and a non-interlaced GIF.
    progressive JPEG
    are similar to Interlaced Gifs and are displayed in a browser window in a series of passes. First a 'blurred' image is shown, then as more information flows in, the clarity increases
    Though interlaced Gifs are larger than normal Gif images, progressiveJpgs are slightly smaller than plain jpg files.
    The only disadvantage in using progressive JPGs is that they require more processing power by the client machine and the browser. However, in these days of high computing power and continued improvements in browser software, this aspect can be safely ignored.
  • 17. WWW
    Animated GIF
    Refer to gif
    Thumbnails
    are reduced-size versions of pictures, used to help in recognizing and organizing them, serving the same role for images as a normal text index does for words.
  • 18. WWW
    Sound
    sound quality
    file size and compression
    streaming
    media players