multimedia_introduction

Slide 1: 

Multimedia Systems HSC Information Processes and Technology

Slide 2: 

Multimedia systems are structured in the following broad areas: Characteristics of each of the multimedia types Software for creating and displaying multimedia Examples of multimedia systems Expertise required during the development of multimedia systems Other information processes when designing multimedia systems Issues related to multimedia systems This material addresses aspects of the following syllabus outcomes: A student: H1.1 applies and explains an understanding of the nature and function of information technologies to a specific practical situation. H2.2 develops and explains solutions for an identified need which addresses all of the information processes. H4.1 proposes and justifies ways in which information systems will meet emerging needs.

A multimedia system is an information system that includes combinations of the following types of media: : 

A multimedia system is an information system that includes combinations of the following types of media: Text Hypermedia Audio Images Animation Video

Text: 

Text Letters Numbers Alphanumeric Special characters (punctuation, symbols) Page 548 of your text book

Text – Numbers & Hypertext: 

Text – Numbers & Hypertext Characteristics of Multimedia Systems Multimedia Systems as Information Systems Combination of different types of media Text - Computing the words printed, written, or displayed on a visual display unit Numbers - one of a series of symbols of unique meaning in a fixed order that can be derived by counting Hypertext - allows the user to navigate through a multimedia product, it is a system that allows documents to be cross "linked in such a way that the use can move from one document to another by clicking on a link. Page 548 & 550 of your text book

Hypermedia: 

Hypermedia Hypertext: hyperlinks in the form of text that allows the user to navigate through information systems such as websites. Microsoft Education Hyperlinks: can also take the form of graphics such as buttons, GIFs and JPGs Page 550 - 551 of your text book

Outline & Raster Fonts: 

Outline & Raster Fonts Outline fonts (also called vector fonts) use Bézier curves, drawing instructions and mathematical formulae to describe each glyph, which make the character outlines scalable to any size. Raster fonts consist of a matrix (or bitmap) of dots or pixels representing the image of each glyph in each face and size. Page 549 of your text book

ASCII: 

ASCII ASCII stands for the American Standard Code for Information Interchange. ASCII is a way of defining a set of characters which can be displayed by a computer on a screen, as well as some control characters which have special functions. Basic ASCII uses seven bits to define each letter, meaning it can have up to 128 specific identifiers. Some examples below of ASCII spc ! " # $ % & ' ( ) * + , - . /    0 1 2 3 4 5 6 7 8 9 : ; < = > ?    @ A B C D E F G H I J K L M N O    P Q R S T U V W X Y Z [ \ ] ^ _    ` a b c d e f g h i j k l m n o    p q r s t u v w x y z { ¦ } ~ del ASCII table summary Page 548 of your text book

EBCDIC: 

EBCDIC EBCDIC (Extended Binary Coded Decimal Interchange Code) is a character encoding set used by IBM mainframes. Unlike virtually every computer system in the world which uses a variant of ASCII, IBM mainframes and midrange systems such as the AS/400 tend to use a wholly incompatible character set primarily designed for ease of use on punched cards. EBCDIC uses the full 8 bits available to it, so parity checking cannot be used on an 8 bit system. Also, EBCDIC has a wider range of control characters than ASCII. spc                    ¢ . < ( +                       ! $ * ) ; |    &                     , % _ > ?    - /                 : # @ ' = "      a b c d e f g h i     j k l m n o p q r       s t u v w x y z     A B C D E F G H I     J K L M N O P Q R       S T U V W X Y Z   0 1 2 3 4 5 6 7 8 9 EBCDIC table summary Page 548 of your text book

Audio: 

Audio Any digitised sound including: - Files (commonly used for music ) Mp3 - Wav files commonly used for sound effects. - Midi files ( musical instrument digital interface) synthesised music Pages 551- 553 of your text book

Images: 

Images Bit mapped graphics: every pixel that makes up an image occupies its own piece of memory . Bit mapped images include JPEG, GIF, PNG and BMP Vector graphics: are made up of objects such as lines and shapes Page 554 - 556 of your text book

Images: 

Bitmapped Graphics Treat each pixel on the screen individually and represent this by bits in memory. They produce good quality images where shading and detail are needed, not good for large images. Aliasing - process of enlarging each pixel in a bit mapped graphic creating a staircase pattern They are often stored in compressed formats such as GIF and JPEG Vector Graphics – next page Made up of objects such as a straight line, curve, or a shape Each object is defined by its characteristics such as position, line width and pattern Images - pictures, drawings or photographs Pixel - the smallest part of the screen which can be controlled by the computer Resolution - the total number of pixels on the screen Examples of Vector & Bitmapped Graphics Images

Images continued: 

Images continued JPEG stands for Joint Photographic Experts Group. It is a standard method of compressing photographic images. We also call JPEG the file format which employs this compression. The file extensions for this format are .JPEG, .JFIF, .JPG, OR .JPE although .JPG is the most common on all platforms. --------------------------------------------------------------------------------------------------------- The PNG Portable Network Graphics file format, commonly referred to as PNG, is an image format similar to the popular GIF format. The PNG image format was developed in response to the enforcement of a patent on the pervasive GIF format. Pages 554 and 555 of your text book

Vector Graphics: 

Vector Graphics Unlike JPEGs, GIFs, and BMP images, vector graphics are not made up of a grid of pixels. Instead, vector graphics are comprised of paths, which are defined by a start and end point, along with other points, curves, and angles along the way. Because vector-based images are not made up of a specific number of dots, they can be scaled to a larger size and not lose any image quality. If you blow up a raster graphic, it will look blocky, or "pixelated." When you blow up a vector graphic, the edges of each object within the graphic stay smooth and clean. This makes vector graphics ideal for logos, which can be small enough to appear on a business card, but can also be scaled to fill a billboard. Pages 556 of your text book

Animation: 

Animation A simulation of movement created by displaying a series of pictures, or frames. Common forms of animation found in multimedia systems include : Animated GIFs Flash Both these files can be found on the next 2 pages.

GIF: 

GIF The Graphics Interchange Format (GIF) is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability. Graphics Interchange Format. A bitmap graphics format from CompuServe which stores screen images economically and aims to maintain their correct colours even when transferred between different computers.

Flash: 

Flash Flash movies load faster and save on download time because Flash is vector based whereas HTML is not. Flash intelligently ‘caches’ it’s movies so they don’t have to be reloaded. Flash gives the user (the person viewing/using the Flash movie) a more responsive ‘rich-client’ like experience. Flash, a popular authoring software developed by Macromedia, is used to create vector graphics-based animation programs with full-screen navigation interfaces, graphic illustrations, and simple interactivity in an antialiased, resizable file format that is small enough to stream across a normal modem connection.

Video: 

Video Digitised live action video. Common forms of video found in multimedia systems include: Avi ( Short for Audio Video Interleave, the file format for Microsoft's Video for Windows standard) Mpeg ( Short for Moving Picture Experts Group. The term also refers to the family of digital video compression standards and file formats developed by the group.) Quicktime ( A video and animation system developed by Apple Computer) Page 561- 563 of your text book

Purposes of MM Systems: 

Purposes of MM Systems Education and training. Leisure and entertainment. Information. Virtual reality and simulations. A combination of these areas.

Task: 

Task Education and training. Leisure and entertainment. Information. Virtual reality and simulations. A combination of these areas. Using PowerPoint and some multimedia examples in your PowerPoint, describe each of the dot points above and give two (2) examples of each.

Personnel: 

Personnel Producer Project manager Writer Content expert Information designer Interface designer Art director Graphic designer Animator 3d Modeller Programmer Sound artist/engineer Video producer Web designer