intro to multimedia systems

IT31 – Multimedia SystemsPrepared by: Ocirne Jun-Jun S. Liwanag

What is Multimedia?Multimedia is media and

content that uses a combination of different content forms. Multimedia includes a combination of text, audio, still images, animation, video, and interactivity content forms.

Multimedia Application is an Application which uses a collection of multiple media sources e.g. text, graphics, images, sound/audio, animation and/or video.

What is HyperText and HyperMedia?Hypertext is a text which

contains links to other texts. (e.g. PDF Documents, Word Documents)

 HyperMedia is not constrained

to be text-based. It can include other media, e.g., graphics, images, and especially the continuous media - sound and video. (e.g. WWW)

MULTIMEDIA SYSTEMSA Multimedia System is a

system capable of processing multimedia data and applications.

Characteristics of a Multimedia SystemMultimedia systems must be

computer controlled.Multimedia systems are

integrated.The information they handle

must be represented digitally.The interface to the final

presentation of media is usually interactive.

Components of a Multimedia SystemCapture devices

◦Video Camera, Video Recorder, Audio Microphone, Keyboards, mice, graphics tablets, 3D input devices, tactile sensors, VR devices. Digitizing/Sampling Hardware

Storage Devices◦Hard disks, CD-ROMs, Zip drives, DVD, etc

Communication Networks◦Ethernet, Token Ring, FDDI, ATM, Intranets,

Internets.

Components of a Multimedia System (2)Computer Systems

◦Multimedia Desktop machines, Workstations, MPEG/VIDEO/DSP Hardware

Display Devices◦CD-quality speakers, HDTV,SVGA, Hi-

Res monitors, Color printers etc.

Examples of Multimedia Applications include:World Wide WebHypermedia coursewareVideo conferencingVideo-on-demandInteractive TVGroupwareHome shoppingGamesVirtual realityDigital video editing and production systemsMultimedia Database systems

CATEGORIZATION OF MULTIMEDIALinear active content progresses

without any navigation control for the viewer such as a cinema presentation.

 Non-linear content offers user

interactivity to control progress as used with a computer game or used in self-paced computer based training.

ELEMENTS OF MULTIMEDIAText - Displays word on the screen –

is the base layer of almost all programs. Text is still the quickest programs will always use it.

Pictures - Multimedia computers can display photograph quality pictures on the monitor.

Movies - With a multimedia program, your computer can turn into a TV set.

ELEMENTS OF MULTIMEDIAAnimation - Sometimes

animation can express a point better than movies.

Sound - A biting dinosaur isn’t much impressive unless you can hear the bone crunches well.