Friday, 28 November 2008

Online and offline delivery mediums

Connected to via the internet, the www or World Wide Web is basically a system of html web pages which are made up off images, text, videos and various types of multimedia. These pages can be navigated between using hyperlinks.
Email or Electronic Mail is self explanatory, a method of sending mail and files via the internet using file transfer protocols to another recipient by using electronic communication on a computer.

A newsgroup or discussion group is a storage place in which a log of messages from many different people in different locations can be posted. As with discussion forums these posts can be read and replied to by others. To read these newsgroups, software like Microsoft Outlook is usually required.

Social networking is an online community or website on which people can interact with other people or friends who may have the similar interests and hobbies. Users can contact one another by on-site email and instant messaging.

CD-ROM (Compact Disc, read-only-memory) is a form of Compact disc which allows data of many types to be written onto and read from it. They can be used on any CD player or recorder to play music files or retrieve the contained data. The cd works similar to a vinyl record with a spiral groove but within these grooves are a series of small and long bumps, it’s on the longer bumps that the data is written.

Magnified section of CD-ROM 'bumps'


A USB flash drive is a small removable file storage device which connects to a computer by the USB2.0 port. Files can be written to and deleted from the flash drive and as it is very small can be transported around in a pocket or on a keyring making it very useful for presentations etc.. Flash drives are much more economical than old floppy discs and even cd-roms. Unlike the CD or floppy disc the flash drive contains a small printed circuit board, this is protected by a plastic case and makes it very robust for carrying around.

Common file types used for interactive applications.

GIF - Image File - graphic in GIF format - open in web browser or graphics program.
GIF is a favoured file in the creation of logos or where a sharp clean edge or lines is required as there is no loss in resolution or file compression. GIF uses 256 colours which is adequate for logos etc.

JPEG - Image File - Graphic in JPEG format (Joint Photographic Experts Group) View with web browser or image editing program.

SWF - Media - Macromedia Shockwave Flash animation movie. SWF files are played in Adobe Flash Player either in a web browser on a site or a stand alone player. There are a few different software programs used to create SWF movies on including the most popular Easy Flashmaker but others are available including Anysoft and SWF Image Creator.

FLA - Media - Macromedia Flash animation file - requires Shockwave.

PPT (Powerpoint Presentation) - Application - Microsoft PowerPoint file - used for creating slides and overhead presentations. These files can be viewed in Microsoft Office, Star Office and now Google documents. Production would be done on Microsoft Power Point.

PPTX - Application - New format for MS Office documents, a combination of XML architecture and ZIP compression for size reduction.

QT - Quicktime movie - Also, SDP stream descriptor file viewed via a Quicktime plug-in.

HTML - Text file - hypertext document [same as .html] - opens in a web browser - edit in any word-processor or text editor. Implemented in authoring software similar to CSS below.

CSS (Cascading Style Sheets)- Style Sheet - plain text file containing web page style preferences.
CSS is a side software to HTML used to add style such as colour, fonts or spacing to web pages. It is viewed through many web browsers and used in numerous web authoring tools such as Notepad++, Adobe GoLive CS2, Macrabbit’s CSSEdit or Panic’s Coda.

EXE - Application - self-extracting or executable file - run by double-clicking in Windows.
EXE is one of the most well known file extensions, it indicates an executable file or a program.

MP3 - Audio - Audio file in MP3 format - CD-quality sound, with 10x compression.
MP3 is the most well known and widely used file extension as it is used by a huge percentage of the population to play music files on digital audio players. These include Windows Media Player and WinAmp which work on your computer or the files can be downloaded onto a mp3 player and listened to using headphones or a docking device.

MPEG4 - Media -a collection of methods defining compression of audio and visual (AV) digital data.
MPEG4 is the digital media standard for delivering high quality video and audio streams on a vast range of bandwidths, from mobile phones to broadband.