[精选简短的英语儿歌双语]英语儿歌：北风呼呼吹The north wind doth blow,北风呼呼吹，And we shall he snow,我们将会迎来一场雪，And what will the robin do then, poor thing?知更鸟怎么办，小可怜...+阅读

1.Text

Whether or not they he used a puter, most people are familiar with text. Text is the basis for word processing programs and is still the fundamental information used in many multimedia programs.

In fact, many multimedia applications are based on the conversion of a book to a puterized form. This conversion gives the user immediate access to the text and lets him or her display pop-up windows, which give definitions of certain words. Multimedia applications also enable the user to instantly display information related to a certain topic that is being viewed. Most powerfully, the puterized form of a book allows the user to look up information quickly （without referring to the index or table of contents）.

The Windows operating environment gives the user an almost infinite range of expressing text. As a multimedia programmer, you can choose what font to display text in, how big （or small） it should be, and what color it should be displayed in. By displaying text in more than one format, the message a multimedia application is trying to portray can be made more understandable[1].

One type of a application, which many people use every day, is the Windows Help Engine. This application is a text-based information viewer that makes accessing information related to a certain topic easy.

2.Audio Sound

The integration of audio sound into a multimedia application can provide the user with information not possible through any other method of munication. Some types of information can't be conveyed effectively without using sound. It is nearly impossible, for example, to provide an accurate textual deion of the beat of a heart or the sound of the ocean.

Audio sound is ailable in several different formats. Today, maybe the most mon type of audio is red book audio. This is the standard specification used to refer to consumer audio pact discs. It is an international standard and is officially known as IEC 908[2].

Another audio sound format is the Windows we file, which can be played only on PCs running the Windows operating environment. A we file contains the actual digital data used to play back the sound as well as a header that provides additional information about the resolution and playback rate. We files can store any type of sound that can be recorded by a microphone.

The final type of a audio sound that may be used is known as the Musical Instrument Digital Interface, or MIDI for short. The MIDI format is actually a specification invented by musical instrument manufacturers. Rather than being a digitized form of the sound, the MIDI specification is actually a set of messages that describes what musical note is being played. The MIDI specification cannot store anything except in the form of musical notes. MIDI music can be created with a sequencer.

3.Static Graphics Images

When you imagine graphics images you probably think of "still" images - that is, images such as those in a photograph or drawing. There is no movement in these types of picture. Static graphics images are an important part of multimedia because humans are visually oriented [3]. As the old Chinese proverb goes, "A picture is worth a thousand words." Windows is also a visual environment. This makes displaying graphics images easier than it would be in a DOS-based environment.

Static graphics images he a number of formats and can be created in a number of different ways. Just as you can see an unlimited number of photographs or pictures, the types of static graphics images that you can include in a multimedia application are almost unlimited.

4. Animation

Animation refers to moving graphics images. The movement of somebody giving CPR makes it much easier to learn cardiopulmonary resuscitation, rather than just viewing a static picture[4]. Just as a static graphics image is a powerful form of munication, such is the case with animation. Animation is especially useful for illustrating concepts that involve movement.

Such concepts as playing a guitar or hitting a golf ball are difficult to illustrate using a single photograph, or even a series of photographs, and even more difficult to explain using text. Animation makes it easier to portray these aspects of your multimedia application.

5. Full-Motion Video

Full-motion video, such as the images portrayed in a television, can add even more to a multimedia application. Although full-motion video may sound like an ideal way to add a powerful message to a multimedia application, it is nowhere near the quality you would expect after watching television. Full-motion video is still in its beginning stages on PCs, and it is limited in resolution and size[5]. Even with advanced methods of data pression, full-motion video can suck up hard disk space faster than water falls when poured out of a bucket[6].

Right now, there are two major methods of incorporating full-motion video into a multimedia application： Microsoft Video for Windows, and Quick Time for Windows from Apple puters. Both products e with tools for getting the video from an external input （a videocassette recorder or a video camera） and storing it on your hard disk drive.

NOTES

[1] 主句中主语message由后面的定语从句修饰，can be made….为谓语。

[2] IEC国际电子技术委员会。

[3] oriented：作为形容词，译为面向，此种用法在科技英语中很普遍。

[4] CPR：心肺复苏，即心脏运动。

[5] 此处size是指视频影像的长短规模。

[6] suck up：原意为吸满，此处为写满硬盘。句中后边用水桶注水比喻，译时可以略去。另外，这种情况由于PC机技术的飞速发展，已有很大改观。

1.文本

不管是否用过计算机，大多数人都熟悉文本。文本是字处理程序的基础，并且仍作为基本信息用于许多多媒体程序中。

实际上，许多多媒体应用程序是基于由书本到其计算机化形式的转换的。这种转换使用户能直接访问文本，并为其显示一个弹出式窗口，以给出某些词的定义。多媒体应用程序还使用户能够立刻显示与正在浏览的某个主题有关的信息。功能更强的是，一本计算机化的书允许用户快速查找信息（而不必查找索引或目录）。

Windows操作环境赋予用户表达文本的范围几乎是无限的。作为多媒体程序员，你可以选择要显示文本的字体、大小和颜色。通过用多种格式显式文本，人们更易理解多媒体应用程序试图表达的信息。

许多人每天用到的一种多媒体应用程序是Windows帮助引擎，这个应用程序是一种基于文本的浏览程序，它使得访问与某一主题相关的信息变得很容易。

2.声音

把声音融入多媒体应用程序，可以为用户提供使用其他任何通信方式无法得到的信息。某些类型的信息不用声音是不可能有效传达的。例如，用文字准确描述心脏的跳动声或大海的声音几乎是不可能的。

声音有几种不同的格式。今天，最普遍的声音类型也许是声音红皮书，这是为音响CD消费者提供的标准。它是一种国际标准并正式称为IEC 908.

另一种声音格式是Windows波形文件，它只能用于Windows环境下的个人电脑。波形文件包含用于回放声音的实际数字数据和文件头，该文件头提供有关分辨率及回放速度的附加信息。波形文件可以保存通过麦克风录入的任一种类型的声音。

最后一种可用的声音类型称为乐器数字接口，缩写为MIDI.MIDI格式实际上是由乐器制造商制订的一种规范，MIDI规范并非是声音的数字化格式，而实际是描述要演奏的音符的信息集合。MIDI规范不能保存除音符格式之外的任何信息。MIDI音乐可以由定序器生成。

3.静态图像

当你想象图像时，你很可能想到静态的图像——也就是像照片或画中那样的图像，这种类型的图像是不动的。静态图像是多媒体的重要部分，因为人类是视觉定位的。正如中国有句谚语所说“一图胜千言”，Windows也是图形环境，它比DOS环境更容易显示图像。

静态图像有许多种格式，也可以用许多不同的方式生成。就像你可以看到无数的照片或图画一样，多媒体应用程序中包括的静态图像类型几乎是无限的。

4.动画

动画指的是运动的图像。给出人体运动的CPR比只给出一幅静态图像可使人更容易明白心肺的复苏。动画和静态图像一样，都是强有力的通信形式，动画在解释涉及运动的概念时特别有用。

像弹吉他或打高尔夫球那样的概念，用一幅照片，甚至用一系列照片也很难说清楚，用文字解释就更困难了。而用动画来描绘多媒体应用中的这些方面就更为容易。

5.全运动视频

全运动视频，例如电视传送的图像，可以更多地加入到多媒体的应用中。虽然全运动视频听起来像是一个往多媒体程序中加入强有力信息的理想方法，但它无法达到人们看电视一样的效果。PC机上的全运动视频仍处在初始阶段，其分辨率和长度受限制。即使用先进的数据压缩算法，全运动视频的数据也可以比往水桶中灌水还要快地占满硬盘空间。

现在，在多媒体应用程序中采用全运动视频的方法有两种：微软的Video for Windows和苹果机上的QuickTime for Windows.这两种产品都配有从外部输入设备获得视频影像（录像机或摄像机）并将之储存于硬盘驱动器上的工具。

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