1 / 27

What is Multimedia?

What is Multimedia?. A combination of different media types such as text, graphics, audio, video and animation etc in a single application package Integration of what were previously considered separate methods of communication

castor-carney
Download Presentation

What is Multimedia?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. What is Multimedia? • A combination of different media types such as text, graphics, audio, video and animation etc in a single application package • Integration of what were previously considered separate methods of communication • A multimedia application combines at least 3 of the media types mentioned above

  2. What is Multimedia used for? • To create an engaging learning environment • To better communicate a message • To make applications more interesting, interactive and effective

  3. Why Use Multimedia?Studies have shown that as learners • Listen they recall 25% of the material they hear • Hear and see they will remember 50% • And learners who hear, see, and interact with the material during the learning process will remember 75% of the material

  4. In Education • Multimedia training allows learners to take greater control of their own learning process • Learners can move through courseware content at their own pace • Student can retrace his/her steps

  5. Communication • Technology allows us to combine media to communicate a message • By combining media it is easier to deliver the message

  6. Advantages • By using multimedia in your applications you can produce applications that are: • More Efficient • More Direct • Interactive

  7. More Efficient • You can replace information you read with information you can see and hear, such as a video clip • This might convey the message in a more efficient manner • Can access people who otherwise could not hear or see the message

  8. Direct • You can deliver information using the best medium • Example: A language-teaching application that plays a native speaker’s voice to demonstrate pronunciation

  9. Interactive • It is easier to get user interaction with pictures and sounds than with plain text only • Users are drawn to objects on the page/screen other than text • If the application uses hypertext, users do not have to follow a single path but can choose which path to take

  10. The Elements of Multimedia • Text • Graphics • Sound • Video • Animation

  11. Text • Text often shapes the content of a multimedia application • Different text formats depend on how the text was created • Some formats are * .doc, *.txt and *.rtf • Text is easy to handle and store and does not take up a lot of storage space • Text files are created using a word processor

  12. Graphics • Add visual appeal to an application • May express an idea more clearly • Two main types • Bitmapped • Vector

  13. Graphics - considerations • Grapahics require a lot of storage space and RAM to work with • There are many file formats: *.bmp *.pic *.gif *.tif *.jpg to name a few • Needs a graphics application to create and edit pictures • Display differently depending on the monitor resolution and colour settings of the computer

  14. Graphics – Considerations • The resolution • the number of pixels stored per inch of the image size • The colour bit-depth • the number of colours stored for each pixel within the image • Each of these directly affect the file size of the stored image and its quality when displayed on screen or printed

  15. Sound • Speech, sound effects or music • Can be used to complement text or to add a mood or emphasis • Sound has to be captured and digitized • This is done using a microphone to record voice or music and edited using sound-editing software

  16. Sound • Can be recorded or synthesized • Sound qualities • Mono – single channel • Stereo – 2 channels of amplification • Quadraphonic – 4 channels • Surround – 4-6 channels Graphic representation of a sound wave

  17. Sound - considerations • Quality v storage requirements • Sample Rate – this is the number of samples taken of the sound per second • The more samples the better the quality but the larger the file. CD-quality is 44,100 samples per second (44.1 KHz)

  18. Sound - considerations • Bit-depth or sample resolution – the amount of information that is stored about each sound sample • 8-bit gives mono sound • 16-bit gives mono or stereo • Channels – 1-channel is mono, 2-channel is stereo etc • File formats are *.wav *.au and *.snd or *mid (for synthesized sound) and others

  19. Made up of frames which are like still pictures or photos A few seconds of video may have hundreds of frames Need a video-editing application ie Adobe Premier Video

  20. Video – considerations - Storage • Most video needs compression because of the size of the original recordings • Roughly 5 mins of video will need 1GByte of storage space before it is compressed • A video is no more than an array of still images synchronizedwith a sound file

  21. Video - considerations - File Size • Video size on disk and in memory depends on • video playback window size [Frame Size] • the frame rate (how many frames are played back each second) • the audio sample rate • type of compression used • Common file formats are *.avi *.mov and *.mpg

  22. Video – considerations • Frames per second is an important factor • If the frame rate is too slow the video will look like a slide show • TV quality 30 fps • Cinema quality is 24 fps • Web quality 10-15 fps • Video applications will need a plug-in application to play on your computer screen (Windows Media Player or QuickTime)

  23. Animation • Animation is "active graphics" • It is really a type of video • Common "pure" digital animation file formats include *.FLC and *.FLI • Many of the concerns of video also apply to animation ie size

  24. Hardware Required • A multimedia PC consists of these basic components • A fast, powerful PC, a CD-ROM or DVD drive, an audio board, an operating system that can handle multimedia, a set of speakers or headphones for audio output and a microphone for recording sound (digitising) and a video-capture board for video input

  25. You will also need • Lots of hard disk storage and lots of RAM memory. • A CD or DVD writer is now almost a necessity and is becoming standard with many new PCs

  26. Software Requirements • Software associated with each of the multimedia elements such as: • Flash for animations • PhotoShop or other graphics software for graphics creating and editing • Video and sound editing software ie Adobe Premiere • Compression software to make files smaller • Plug-in software – QuickTime, Media Player

  27. Bringing it All Together • To put your multimedia application together you need a multimedia authoring package to assemble the files into a single application ie Macromedia Director • You will also need an optical storage medium such as CD or DVD • Some applications such as PowerPoint allow you to incorporate multimedia objects into a presentation but are not true authoring packages

More Related