C20'0020

1
C20.0020

• Multimedia Systems
• Norman White
• Room MEC 9-81
• Office Hours T,Th 1-2pm
• 330-4pm

2
Course Overview

• Section I
• Overview of digital multimedia
• Networked multimedia
• Section II
• Multimedia Applications
• Section III
• Introduction to the World Wide Web
• Section IV
• Advanced multimedia on the WEB

3
Course Requirements

• Homeworks
• Quizzes
• Mid-term
• Final Exam
• Final Paper/Project
• Participation in class

4
Readings

• Textbook
• Multimedia- Making it Work, Osborne 5th edition,
  Tay Vaughan
• Handouts
• Web materials

5
Homeworks

• In General, homeworks are posted to your class
  web page
• (I.e. www.stern.nyu.edu/userid/multim)
• IT IS VERY IMPORTANT THAT YOU POST YOUR HOMEWORKS
  UNDER THE NAME GIVEN IN THE HOMEWORK ASSIGNMENT!
• If you name your assignments incorrectly, or put
  them in the wrong place they wont get graded.
  (see syllabus for assignment names)

6
Multimedia

• Definitions and components

7
Digital Multimedia

• The field concerned with the computer-controlled
  integration of text, graphics, still and moving
  images, animation, sounds, and any other medium
  where every type of information can be
  represented, stored, transmitted, and processed
  serially

8
Types of Multimedia Information

• text
• graphics
• images
• moving graphics (animation)
• moving images (video)
• sound

9
Text

• Text in a multimedia environment is usually
  hypertext, i.e. text element can be anchors
  that point to other elements (textual or other)
  in the same or different document.

10
Graphics and Images

• Graphics elements are revisable documents that
  retain some structural information in the form of
  objects.
• Images are not revisable. They ignore the
  semantic contents and are described as bitmaps
  consisting of individual pixels, each coded with
  a fixed number of bits.
• Pixel smallest element on a screen or image

11
Moving Graphics and Images

• We can create the impression of motion by quickly
  displaying a sequence of graphics or images
• moving images gt moving pictures
• moving graphics gt computer animation
• frame rate - how may images do we display in a
  second (gt16fps gt smooth motion)
• Movies, 24fps HDTV 60fps

12
Sound

• Speech - to capture speech, need to digitize it
  at 64kbs (64000 bits per second)
• Once captured, we can replay it at will
• Sound Synthesis - Use computer to generate the
  sound
• Speech recognition - use computer to recognize
  speech

13
Discrete vs. Continuous Media

• Continuous media gt time is part of the
  representation (i.e sound or motion video)
• This means that there are time constraints on the
  displaying of information
• Discrete media - media where time sequence
  doesnt matter, ie. text, graphics, images
• Note we often combine the two types in a
  presentation (ie. text and speech)

14
(No Transcript)
15
What is Important?

• Multimedia appeals to multiple senses hence has
  much greater impact than straight text
• Retention rates 2-3 times higher than straight
  lectures
• It can be delivered under program control, so is
  very effective in training and education
• Distance Education
• Automated tracking, integrated with HR system
• Rapidly growing industry
• Now completely web enabled

16
Summary

• Need to understand all of the above to understand
  and produce multimedia
• This course will focus on networked multimedia -
  (I.e. delivering multimedia over the World Wide
  Web)

17
Some interesting sites

• www.wired.com
• www.nytimes.com
• home.netscape.com
• www.microsoft.com
• Courses.stern.nyu.edu/
• This will be updated during the semester with
  interesting information

18
Things to do

• Read text
• Create your home page
• Scan a picture of yourself
• Create userid/multim (directory for assignments)
• Check out course site, make sure you can log in
  etc.
• Think about a final project
• Lets make a home page..