Presentation on theme: "Chapter 01- Part I Introduction To Multimedia"— Presentation transcript:
1 Chapter 01- Part I Introduction To Multimedia CGMB 234Multimedia Systems DesignChapter 01- Part IIntroduction To Multimedia
2 Objectives At the end of this chapter, students should be able to: describe the history and development of media, computer and multimedia systemsdistinguish between hypertext, hypermedia and multimediaIdentify all the multimedia building blocksDistinguish between modalities, channels, medium and bandwidthstate the FOUR (4) characteristics of multimedia systemstate and describe the multimedia applications and software tools available
4 History Of MultimediaWhat can we say about the evolution of media that has taken place for thousands of years?Since the dawn of time, people have had the need to communicate with one another.This created what we called as communication media.
5 History Of MultimediaNewspapers (perhaps) the first mass communication medium, which used mostly text, graphics, and images.1895 Gugliemo Marconi sent his first wireless radio transmission at Pontecchio, Italy.1901 he detected radio waves beamed across the Atlantic.Initially invented for telegraph, radio is now a major medium for audio broadcasting.
6 History Of Multimedia Television new media for the 20th century. It brought video (+audio) and has since changed the world of mass comm.
7 Some Important Events In Computer History Vannevar Bush ( ) wrote about Memexa device in which an individual stores all his books, records, and communications, and which it is mechanized so that it may be consulted with exceeding speed and flexibilityVannevarBush
8 Some Important Events In Computer History 1960s - Ted Nelson started Xanadu project (The Original Hypertext Project)Douglas Engelbart demonstrated NLS (oN Line System) - The Debut of The MouseNelson & Van Dam hypertext editor at Brown University.Engelbart
9 Some Important Events In Computer History Architecture Machine Group proposal to DARPA: Multiple MediaNegroponte, Wiesner: opened MIT Media Lab in BostonTim Berners-Lee proposed the World Wide Web to CERN (European Organization For Nuclear Research)1990Kristina Hooper Woolsey headed Apple Multimedia Lab, 100 staff, for educationDec Birth of WWW - Tim Berners CERN
10 Some Important Events In Computer History U. Illinois National Center for Supercomputing Applications: NCSA Mosaic1994 – Jim Clark and Marc Andreessen: NetscapeJAVA language for platform-independent application development.1998 – XML 1.0 announced as a W3C recommendation1998 – Handheld MP3 devices (32MB) flash memory2000 – WWW size estimated over 1 billion pages.2005 – YouTube were introduced, a video sharing websiteMay 2011 – Justin Bieber - Baby ft. Ludacris ,581,973 views on YouTube
12 Hypertext and Hypermedia Hypertext text which contains links to other texts and is usually non-linearInvented by Ted Nelson around 1965Hypermedia is not constrained to be text-based.It can include other media, e.g., graphics, images, and continuous media (audio & video).Apparently, Ted Nelson was also the first to use this term.The World Wide Web (WWW) is the best example of hypermedia applications.
15 Multimedia The notion of Multimedia Consists of two words: Multi (Latin)= many; much;Medium (Latin) = An intervening substance through which something is transmitted or carried on.
16 Multimedia What is Multimedia? Multimedia means a (usually) interactive combination of two or more media elements (multimedia building block), such as text, graphics, audio, video and animation integrated using a computerA multimedia system is a system that supports more than a single type of media.
17 Multimedia Building Block Digital environmentUSERElements of Multimedia
18 Multimedia has a number of distinct and unique features, including: Based on Edgar Dale (Cone Of Learning), on average, people remember:10% of what they read,20% of what they hear,30% of what they see,50% of what they hear and see, multimedia approachmultimedia rich elements, multi-sensory delivery system can facilitate greater retention of new knowledge
20 Multimedia Modalities Modalities are the sensory systems through which a multimedia activity occursThis includes tactile (touch), gustatory (taste), visual (sight), auditory (hearing), olfactory (smell)Based on the multimedia elements we have today, only two modalities are regularly used.
21 Multimedia ChannelsChannels can be understood as existing within a modality.For example, with the auditory modality, we have different channels for noises, speech and music.With the visual modality, we have different channels for words, pictures and movies.
22 Regularly Used Modalities & Channels VisualWordsPicturesMoviesAuditoryNoisesSpeechMusicModalitiesChannels
23 Multimedia ChannelsBandwidth is a concept of how much information can be carried by a certain channel within a certain modality.For example, we can read at the rate of 150 words per minute which is the ‘printed text’ channel within the ‘visual’ modality.Much like your modem, you are unlikely to reach the theoretical maximum bandwidth of your channel within any modality, in practice.
24 Multimedia ChannelsThe reason for this discrepancy in practice is because in theory, we assume a perfect encoder and decoder.For example, English text ‘encoded’ on a page and the English language ‘decoder’ in someone’s head is assumed to be perfectly compatible.In reality, however, it is highly dependent on the education level of the reader, the nature of the text information presented and many other factors.
25 Multimedia ‘Medium’A medium can be understood as a set of co-ordinated channels, spanning one or more modalities, which have come to be referred to as a unitary whole, and which possess a cross-channel language of interpretation.Examples include a television show, which typically uses the auditory and visual modalities; and picture, written text, speech and music channels.
26 Multimedia ‘Medium’What is meant by a ‘cross-channel language of interpretation’ is that there must be some form of relationship between the channels.Take the TV show, for example.The moving pictures and sound are closely related.In combination, they provide a clearer message than when alone.
27 Digital Media Revolution Digital camcorders, cameras, MP3 playersbut also location sensors, speech, gestures, etc.Digital media enables new forms of expressioninform, educate, entertain, provoke, etc.multi-sensory, emphasizes temporal over spatialDigital media places the power of mega production studios at the fingertips of the userrecord, edit, process, play, and share digital mediaprofound social, cultural, educational, technological, and communicative impact – its just now beginning
28 Multimedia Requires Multiple media Coordination Interaction Combination of two or more media of which at least one is a discrete medium such as text and image and one is a continuous medium such as audio and videoCoordinationtemporal or spatialInteractionuser exercises control
29 Overlapping Technologies Different branches of multimedia grow together because of new, upcoming multimedia technology and applications.Two challenges lie ahead:Timing requirements (synchronization etc.)Integration requirements (of different media types)
30 Where’s the Action in Multimedia? Enable amateurs to take pictures and shoot video like the prosInterfaces for organizing, retrieving, and accessing large collections of contentCapturing and sharing experiencesMulti-source/multi-party collaborative systems3D mediaP2P Streaming (IPTV)
31 Multimedia System Characteristics Multimedia systems must be computer controlled.All multimedia components are integrated.The interface to the final user may permit interactivity.Information must be represented digitally.