ssg_m1l1 - Module 1 Multimedia Systems Version 2 ECE IIT...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Version 2 ECE IIT, Kharagpur Module 1 Multimedia Systems
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Version 2 ECE IIT, Kharagpur Lesson 1 Introduction to Multimedia Systems and Processing
Background image of page 2
Version 2 ECE IIT, Kharagpur Instructional Objectives At the end of this lesson, the students should be able to: 1. Define multimedia signal. 2. Name at least five different sources of multimedia signal. 3. State the motivation behind the growth of multimedia technology. 4. State the elements of multimedia communication system. 5. State at least five challenges involved with multimedia signal processing and communication. Introduction In the era of information technology, we are dealing with free flow of information with no barriers of distance. Take the case of internet as one of the simplest examples. You can view and download information across the globe within a reasonable time, if you have a good speed of connection. Let us spend a bit of time to think in which form we access the information. The simplest and the most common of these is the printed text. In every web page, some text materials are always present, although the volume of textual contents may vary from page to page. The text materials are supported with graphics, still pictures, animations, video clippings, audio commentaries and so on. All or at least more than one of these media, which we can collectively call as “multimedia”, are inevitably present to convey the information which the web site developers want to do, for the benefit of the world community at large. All these media are therefore utilized to present the information in a meaningful way, in an attractive style. Internet is not the only kind of information dissemination involving multiple media. Let us have a look at some other examples as well. In television, we have involvement of two media – audio and video, which should be presented together in a synchronized manner. If we present the audio ahead of video or video ahead of audio in time, the results are far from being pleasant. Loss of lip synchronization is noticeable, even if the audio and the video presentations differ by just 150 milliseconds or more. If the time lead or the lag is in order of seconds, one may totally lose the purpose of the presentation. Say, in some distance learning program, the teacher is explaining something which is written down on a blackboard. If the audio and the video differ in time significantly, a student will not be able to follow the lecture at all. So, television is also a multimedia and now, we understand one more requirement of multimedia signals. The multimedia signals must be synchronized and if it is not possible to make them absolutely synchronized, they should at
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Version 2 ECE IIT, Kharagpur least follow a stringent specification by which lack of synchronization can be tolerated. Television is an example, where there is only unidirectional flow of multimedia
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/27/2011 for the course CS 324 taught by Professor Mohammedhajali during the Spring '10 term at Amity University.

Page1 / 17

ssg_m1l1 - Module 1 Multimedia Systems Version 2 ECE IIT...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online