multimedia an introduction - montclair state universitygutierre/ctlect01.pdf · ze-nian li &...
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Multimedia – An Introduction
Angel Gutierrez
http://www.csam.montclair.edu/~gutierre
1Multimedia Computing (CSIT410)
To discuss…
Course IssuesMultimedia – DefinitionsMultimedia SystemData Stream & Continuous mediaS i M diStreaming MediaMultimedia - Applications
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Course IssuesCourse Issues
C HCourse Home– Check the Blackboard site for the course
Text Books
Ze Nian Li & Mark S Drew "Fundamentals of Multimedia"Ze-Nian Li & Mark S. Drew, Fundamentals of Multimedia , Pearson Education, 2004
Additional readings & the class notes will be posted on the course page on a regular basis.
Check the page regularly.
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p g g y
Course IssuesCourse Issues
Coverage
Topics Number of Lectures
Introduction to Multimedia 5
Compression and Standards on Image, Video Audio Need for compression
3Video, Audio. Need for compression
Multimedia OS, Multimedia Database Synchronization, Multimedia C i ti S t t
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Communication Systems, etc..
Future Directions 1
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Course IssuesCourse Issues
E l tiEvaluationTest-1 - 25%Final - 40%Lab / Assignments /Project – 35% (no makeup) (Open Book)/ g / j % ( p) ( p )
Office hoursOffice : RI -319Check the website:http://pages.csam.montclair.edu/~gutierre/Email : [email protected]
Notices:Notices:Blackboard & Course Web site
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Multimedia- DefinitionsMultimedia Definitions
M l i h l i lMulti - many; much; multipleMedium - a substance regarded as the means of transmission of a force or effect; a channel or system of communication, information, or entertainment
(Merriam-Webster Dictionary )
So, Multimedia???The terms Multi & Medium don’t seem fit wellTerm Medium needs more clarification !!!
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Multimedia- DefinitionsMultimedia Definitions
Perception
MediumMeans for distribution and
Presentation Representation
presentation of information
Classification based on Criteria for the
classification of mediumperception (text, audio, video) is appropriate for defining multimedia
c ss c o o ed u
Storage Transmission
Information Exchange
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Exchange
Multimedia- DefinitionsMultimedia Definitions
Ti l k di i i h di iTime always takes separate dimension in the media representationBased on time-dimension in the representation space, media can be
Time-independent (Discrete)Text, Graphics
Time dependent (Continuous)Audio, VideoVideo, sequence of frames (images) presented to the user periodically.Time dependent aperiodic media is not continuous!!
Discrete & Continuous here has no connection with internal representation !! (relates to the viewers impression…)
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Multimedia- DefinitionsMultimedia Definitions
Multimedia is any combination of digitally manipulated textMultimedia is any combination of digitally manipulated text, art, sound, animation and video.A more strict version of the definition of multimedia do not allow just any combination of media.It requires
Both continuous & discrete media to be utilizedBoth continuous & discrete media to be utilizedSignificant level of independence between media being used
The less stricter version of the definition is used in practice:l d d l f b fDevelopment, integration and delivery of any combination of text,
graphics, animation, sound, or video through a computer.
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Multimedia- DefinitionsMultimedia Definitions
d dMultimedia elements are composed into a project using authoring tools.
Multimedia Authoring tools are those programs that provide the capability for creating a complete p p y g pmultimedia presentations by linking together objects such as a paragraph of text (song), an illustration, an audio with appropriate interactive user controlaudio, with appropriate interactive user control.
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Multimedia- DefinitionsMultimedia Definitions
B d fi i th bj t ' l ti hi t h thBy defining the objects' relationships to each other, and by sequencing them in an appropriate order, authors (those who use authoring tools) can produce attractive and useful graphical applicationsattractive and useful graphical applications. To name a few authoring tools
Macromedia FlashM di DiMacromedia DirectorAuthorware
The hardware and the software that govern the limits f h t h lti di pl tf i tof what can happen are multimedia platform or environment
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Multimedia- DefinitionsMultimedia Definitions
d h h d dMultimedia is interactive when the end-user is allowed to control what and when the elements are delivered.
Interactive Multimedia is Hypermedia, when the end-user is provided with the structure of linked elements pthrough which he/she can navigate.
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Multimedia- DefinitionsMultimedia Definitions
M lti di i li h it i t i t ti d thMultimedia is linear, when it is not interactive and the users just sit and watch as if it is a movie.
Multimedia is nonlinear, when the users are given the navigational control and can browse the contents at will.
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Multimedia SystemMultimedia System
h d d f l dFollowing the dictionary definitions, Multimedia system is any system that supports more than a single kind of media
Implies any system processing text and image will be aImplies any system processing text and image will be a multimedia system!!!Note, the definition is quantitative. A qualitative definition would be more appropriatewould be more appropriate.The kind of media supported should be considered, rather the number of media
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Multimedia SystemMultimedia System
A d h d bA multimedia system is characterized by computer-controlled, integrated production, manipulation, storage and communication of independent g pinformation, which is encoded at least through a continuous (time-dependent) and a discrete (time-i d d t) diindependent) medium.
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Data streamsData streams
f d d kData Stream is any sequence of individual packets transmitted in a time-dependent fashion
Packets can carry information of either continuous orPackets can carry information of either continuous or discrete media
Transmission modesAsynchronous
Packets can reach receiver as fast as possible.Suited for discrete mediaAdditional time constraints must be imposed for continuous media
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Data streamsData streams
hSynchronous Defines maximum end-to-end delayPackets can be received at an arbitrarily earlier timePackets can be received at an arbitrarily earlier timeFor retrieving uncompressed video at data rate 140Mbits/s & maximal end-to-end delay 1 second the
i h ld h 17 5 Mbreceiver should have temporary storage 17.5 MbytesIsochronous
Defines maximum & minimum end-to-end delayDefines maximum & minimum end to end delayStorage requirements at the receiver are reduced
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Characterizing continuous media streamsCharacterizing continuous media streams
P i di iPeriodicityStrongly periodic
PCM coded speech in telephony behaves this way.W kl P ri diWeakly PeriodicAperiodic
Cooperative applications with shared windowsVariation of consecutive packet sizeVariation of consecutive packet size
Strongly RegularUncompressed digital data transmission
Weakly regularWeakly regularMpeg standard frame size I:P:B is 10:1:2
Irregular
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Characterizing continuous media streamsCharacterizing continuous media streams
kContiguous packetsAre contiguous packets are transmitted directly one after another/ any delay?y yCan be seen as the utilization of resourceConnected / unconnected data streams
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Streaming MediaStreaming Media
P l h i di h iPopular approach to continuous media over the internetPlayback at users computer is done while the media is being transferred (no waiting till complete download!!!)g ( g p )You can find streaming in
Internet radio stationsDi t l iDistance learningCricket Live!!!Movie Trailers
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Streaming MediaStreaming Media
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Multimedia- ApplicationsMultimedia Applications
Multimedia plays major role in following areasInstructionB iBusiness
AdvertisementsTraining materialsP iPresentationsCustomer support services
EntertainmentInteractive Games
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Multimedia- ApplicationsMultimedia Applications
Enabling TechnologyAccessibility to web based materialsT h l d bl d h ld d lTeaching-learning disabled children & adults
Fine Arts & HumanitiesMuseum toursArt exhibitionsPresentations of literature
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Multimedia- ApplicationsMultimedia Applications
In MedicineIn Medicine
Source: Cardiac Imaging,YALE centre for advanced cardiacadvanced cardiac imaging
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Multimedia- ApplicationsMultimedia Applications
In training
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Multimedia- ApplicationsMultimedia Applications
Public awareness campaign
SourceSourceInteractive Multimedia Project Department of food science& nutrition, Colorado State Univ
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ReferencesChapter 1
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