Lecture #2: Lecture #2: Introduction to Multimedia Introduction to Multimedia Computing & Communication Computing & Communication Lecturer: Lecturer: Abdusy Syarif Abdusy Syarif Undergraduate Course Undergraduate Course Informatic Engineering Dept. Informatic Engineering Dept.
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Lecture #2: Introduction to Multimedia Computing ...Introduction to Multimedia Computing & Communication Lecturer: Abdusy Syarif Undergraduate Course ... these media include animation,
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Lecture #2:Lecture #2:
Introduction to Multimedia Introduction to Multimedia Computing & CommunicationComputing & Communication
Search for Multimedia resourceSearch for Multimedia resource
Search EngineSearch Engine➢ Google: Approximately 150 million Google: Approximately 150 million
searches per day ( per Google’s web searches per day ( per Google’s web site)site)
➢ Inktomi :Approximately 80 million Inktomi :Approximately 80 million searches per day (per searches per day (per SearchEngineWatch.comSearchEngineWatch.com))
➢ AltaVista : Approximately 50 million AltaVista : Approximately 50 million searches per day (per searches per day (per SearchEngineWatch.comSearchEngineWatch.com))
Search for Multimedia resource (Con’t)Search for Multimedia resource (Con’t)
Search Engine (con’t)Search Engine (con’t)➢ Direct Hit : Aapproximately 20 million Direct Hit : Aapproximately 20 million
searches per day (per searches per day (per SearchEngineWatch.comSearchEngineWatch.com))
➢ FAST :Approximately 12 million FAST :Approximately 12 million searches per day (per searches per day (per SearchEngineWatch.comSearchEngineWatch.com))
➢ Galaxy: Approximately 100,000 visitors Galaxy: Approximately 100,000 visitors per day (per Galaxy’s web site)per day (per Galaxy’s web site)
Search Key Word, Search Option, File Search Key Word, Search Option, File typetype
Media Media refer to the types of refer to the types of information or types of information or types of information carriers, such as information carriers, such as alphanumeric data, images, alphanumeric data, images, audio, and video. audio, and video.
Common classifications of Common classifications of Media are based on Media are based on physical physical formatsformats and and media media relationships with time.relationships with time.
• To have a perceptually smooth movement, video must be played back at 25 frames (or 30 frames, depending on the video system used) per second.
• Similarly, when we play back a recorded voice message or music, only one playback rate is natural or sensible. Playback at a slower or faster rate distorts the meaning or the quality of the sound.
SystemsSystems which are capable of which are capable of handling at least one type of handling at least one type of continuous media in digital formcontinuous media in digital form as well as static mediaas well as static media
Video/Movie on DemandVideo/Movie on Demand Information on DemandInformation on Demand EducationEducation TelemedicineTelemedicine Videophone and VideoconferenceVideophone and Videoconference Cooperative WorkCooperative Work
Distinct features of VOD are: We do not have to leave home to watch our favorite video. Our “advanced
television” is connected to video servers through an advanced network. All we need to do is to dial a number and select the video through a user-friendly menu on the TV screen.
Because video servers are centralized and provide services to a large population, their collections are large and updated. If one video server does not have the video we want, it may refer us to some other servers that likely hold the video. In theory, we can watch what we want without leaving home. Further, many users can view the same video without users’ knowing. So there will be no such problem as “Sorry, the video is out.”
We can watch our favorite video or movies anytime we want. We can pause and fast-forward and -backward. We may also be able to
search for a particular scene. We have guaranteed high quality because video is stored in digital form.
The quality will not degrade with increased viewings.
Classes of Multimedia SystemClasses of Multimedia System
Multimedia systems Multimedia systems can be classified into can be classified into standalonestandalone and and distributed systemsdistributed systems