1. Multimedia: Audio, Video, Speech Synthesis and Recognition (Chapter 28 in [2])

2. Outline Introduction Audio and Video
Adding Background Sounds with the bgsound Element
Adding Video with the img Element’s dynsrc Property
Adding Audio or Video with the embed Element
Synchronized Multimedia Integration Language (SMIL)
Web Resources

3. Objectives In this lesson, you will learn:
To enhance Web pages with sound and video.
To use the bgsound element to add background sounds.
To use the img element’s dynsrc property to incorporate video into Web pages.
To use the embed element to add sound or video.
To embed video and create graphics in a Web page using SMIL.

4. Introduction Multimedia Use of sound, images, graphics and video
Add sound, video, and animated characters to Web-based applications
Streaming technologies

5. Audio and Video Can be embedded in Web page
Can be downloaded “on-demand”
Encoding algorithm or codec
Transforms raw audio or video into a format that Web browsers can display

6. Adding Background Sounds with the bgsound Element
src property
Specifies the URL of audio clip to be played
loop property
Specifies number of times audio clip will play
balance property
Specifies balance between left and right speakers
volume property
Determines volume of audio clip

11. Adding Video with the img Element’s dynsrc Property
Incorporates both images and videos
src property
Indicates source is image
dynsrc property
Indicates source is video clip
start property
Specifies when video should start playing
Event fileopen
Video should play as soon as it loads
Event mouseover
Video should play when user position mouse over video

14. Adding Audio or Video with the embed Element
Element embed
Embeds media clip into Web page
Displays a graphical user interface (GUI)
Supported by both Microsoft Internet Explorer and Netscape

17. Synchronized Multimedia Integration Language (SMIL)
Coordinate wide range of multimedia elements
XML-based description language
Organize text, audio, video to occur simultaneously or sequentially
Provide time reference for all instances of text and media
Specifies source and presentation of multimedia

24. Web Resources www.microsoft.com/windows/windowsmedia
msdn.microsoft.com/downloads/default.asp

25. Web Resources (cont.) www.mp3.com www.mpeg.org www.winamp.com
smw.internet.com/smil/smilhome.html