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网络多媒体简介 
Multimedia is pictures, sounds, music, animations and videos.
多媒体指的是图片、声音、音乐、动画和视频。
Modern web browsers have support for many multimedia formats.
最新的网络浏览器支持多种多媒体格式。
What is Multimedia?
什么是多媒体？
Multimedia is everything you can hear or see: texts, books, pictures, music, sounds, CDs, videos, DVDs, Records, Films, and more.
多媒体是你能看见或听见的所有东西：如文本、书记、图片、音乐、声音、CD、视频、DVD、唱片、电影等等。
Multimedia comes in many different formats. On the Internet you will find many of these elements embedded in web pages, and today's web browsers have support for a number of multimedia formats.
多媒体包含不同的格式。在互联网上，你将找到很多嵌套在网页中的多媒体元素。当今，网页浏览器也支持多种多媒体格式。
In this tutorial you will learn about different multimedia formats and how to use them in your web pages.
在这个教程中，你们将学到几种不同的多媒体格式以及在网页中使用它们的方法。
Browser Support
浏览器支持
The first Internet browsers had support for text only, and even the text support was limited to a single font in a single color, and little or nothing else.
第一款网络浏览器只支持文本，文本支持也仅限于单一字体和颜色。
Then came web browsers with support for colors, fonts and text styles, and the support for pictures was added.
接下来的网络浏览器开始支持颜色、字体、文本样式，并允许添加图片。
The support for sounds, animations and videos is handled in different ways by different browsers. Some elements can be handled inline, some requires a plug-in and some requires an ActiveX control.
很多不同的浏览器开始支持不同处理方式的声音、动画和视频。有些元素可以直接在浏览器上进行处理，有些则需要用到插件和ActiveX控件。
You will learn more about this in the next chapters.
你将在下一章学到更多相关的知识。
Multimedia Formats
多媒体格式
Multimedia elements (like sounds or videos) are stored in media files.
多媒体元素（如声音和视频）是被存储于多媒体文件中的。
The most common way to discover the media type is to look at the file extension.
如果你想知道多媒体的格式，那么最简单的方法就是查看它的扩展名。
When a browser sees the file extensions .htm or .html, it will assume that the file is an HTML page. The .xml extension indicates an XML file, and the .css extension indicates a style sheet.
当一个浏览器看到“.htm” 或 “.html” 这样的扩展名之后，它将自认为文件是HTML页面。“.xml” 扩展名意指XML文件，“.css” 意指样式表。
Picture formats are recognized by extensions like .gif and .jpg.
“.gif” 和 “.jpg” 意指图片格式。
Multimedia elements also have their own file formats with different extensions.
多媒体元素同样拥有不同的扩展名。
You will learn more about media file extensions in the next chapters.
你将在下一章学到更多关于多媒体文件扩展名的知识。
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