Note for Multimedia Systems - MS by Munny Kumar

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Subject: MULTIMEDIA Credits: 4 SYLLABUS Basics of Multimedia Technology, Computers, Communication and Entertainment: Multimedia -An introduction: Framework for multimedia systems; multimedia devices CD Audio. CD-ROM. CD-I: presentation devices and the user interface; multimedia presentation and authoring; professional development tools: LANs & multimedia. Internet, World Wide Web & Multimedia; distribution network ATM & ADSL; multimedia servers & databases: vector graphics; 3-D graphics programs; animation techniques; shading; anti -aliasing; morphing: video on demand Image Compression & Standards Making still images: editing and capturing images; scanning images; computer color models: color palettes; vector drawing; 3 -D drawing and rendering; JPEG-objectives and architecture: JPEG-DCT encoding and quantization, JPEG statistical coding; JPEG predictive loss less coding; JPEG performance; Overview of other image file formats as GIF, TIFF. BMP. PNG etc. Audio & Video Digital representation of sound: time domain sampled representation; method of encoding the analog signals; sub-band coding; Fourier method: transmission of digital sound; digital audio signal processing; stereophonic & quadraphonic signal processing; editing sampled sound: MPEG Audio Audio compression & decompression: brief survey of speech recognition and generation; audio synthesis; Musical Instrument Digital Interface (MIDI); digital video and image Compression; MPEG Motion video compression standard; DVI technology: time based media representation and delivery. Virtual Reality Applications of multimedia, Intelligent multimedia system, Desktop Virtual Reality (VR). VR operating System, Virtual environment displays and orientation tracking; visually coupled system requirements; intelligent VR software systems. Applications of environments in various fields viz. Entertainment. manufacturing. Business, education, etc. Suggested Readings: 1. Multimedia: An Introduction, Villamil & Molina, PHI. 2. Sound & Video, Lozano. Multimedia, PHI. 3. Multimedia: Production. Planning and Delivery, Villamil & Molina, PHI 4. Multimedia on the Pc, Sinclair, BPB. Downloaded from Studynama.com - India's Biggest Education Portal that Powers Engineers, Managers, Doctors & Lawyers!

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CHAPTER 1 BASICS OF MULTIMEDIA Multimedia • When different people mention the term multimedia, they often have quite different, or even opposing, viewpoints. – A PC vendor: a PC that has sound capability, a DVD-ROM drive, and perhaps the superiority of multimedia-enabled microprocessors that understand additional multimedia instructions. – A consumer entertainment vendor: interactive cable TV with hundreds of digital channels available, or a cable TV-like service delivered over a high-speed Internet connection. – A Computer Science (CS) student: applications that use multiple modalities, including text, images, drawings (graphics), animation, video, sound including speech, and interactivity. • Multimedia and Computer Science: – Graphics, HCI, visualization, computer vision, data compression, graph theory, networking, database systems. Multimedia and Hypermedia. Components of Multimedia • Multimedia involves multiple modalities of text, audio, images, drawings, animation, and video. Examples of how these modalities are put to use: 1.Video teleconferencing. 2.Distributed lectures for higher education. 3.Tele-medicine. 4.Co-operative work environments. 5.Searching in (very) large video and image databases for target visual objects. Downloaded from Studynama.com - India's Biggest Education Portal that Powers Engineers, Managers, Doctors & Lawyers!

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6.―Augmented‖ reality: placing real-appearing computer graphics and video objects into scenes. 7.Including audio cues for where video-conference participants are located. 8.Building searchable features into new video, and enabling very high- to very low-bit-rate use of new, scalable multimedia products. 9.Making multimedia components editable. 10.Building ―inverse-Hollywood‖ applications that can recreate the process by which a video was made. 11.Using voice-recognition to build an interactive environment, say a kitchen-wall web browser. 1) Introduction to Multimedia Technology a) Multimedia: Any combination of texts, graphics, animation, audio and video which is a result of computer based technology or other electronic media. i) Features of Multimedia: (1) Interactivity: When the end‐user is able to control the elements of media that are required, and subsequently obtains the required information in a non‐linear way (2) Navigation: Enables the user to explore and navigate from one web page to another. (3) Hyperlink: Non‐linear navigation of ―jumping‖ for the required information. (4) Easy to use, Easy to understand: ii) Types of Multimedia: (1) Text: The basic element for all multimedia applications. Directly informs the user about the information that it wishes to convey. (2) Graphics: Pictures as visuals in digital form used in multimedia presentations. There are two types of graphics: (a) Bitmap Graphics (Image Raster): Formed by pixels arranged in specific ways in a matrix form Downloaded from Studynama.com - India's Biggest Education Portal that Powers Engineers, Managers, Doctors & Lawyers!

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(b) Vector Graphics: Formed by lines that follow mathematical equations called vector. (3) Animation: Process of adding movements to static images through various methods. (4) Audio: Sound in Digital form used in Multimedia Presentations. (5) Video: Video in digital form in Multimedia Presentations 2) Multimedia Technology Applications a) Video Teleconferencing: Transmission of synchronised video and audio in real‐time through computer networks in between two or more multipoints (or participants) separated by locations. Advantages Disadvantages  Reduces travelling cost and saves time;  Increases productivity and improves the quality of teaching and learning;  Make quick and spontaneous decisions;  Increases satisfaction in teaching or at the workplace  Video requires more bandwidth than audio. Therefore, Video teleconferencing is expensive. (Use Video compression to solve)  Requires a network to support short‐delay as audio and video are asynchronous and it is realtime. (Use Optimum multimedia network; fibre optics or ISDN) b) Multimedia Store and Forward Mail: Allow users to generate, modify and receive documents that contain multimedia. Eg. Gmail, Hotmail, Yahoo etc c) Reference Source: Using multimedia to obtain information that we require. Eg. Multimedia Encyclopedias, directories, electronic books and dictionaries etc. d) Edutainment and Infotainment: i) Edutainment: The inclusion of multimedia in the field of education gave birth to edutainment, which is a new learning approach combining education with entertainment. Eg. Math Blaster, Fun Maths etc. Downloaded from Studynama.com - India's Biggest Education Portal that Powers Engineers, Managers, Doctors & Lawyers!