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1千兆是多少个字节?

How many Bytes are in a Gigabyte?

Computers today, can hold a lot of information;
现在的计算机可以存储很多信息
the terminology can get confusing.
但相关术语可能让人困惑
Gigabytes,
GB
Terabytes,
TB
and what’s a Petabyte?
还有PB都是什么?
Let’s start at the beginning.
我们一起来看下吧
This cube here, represents the smallest piece of information a computer can hold.
这个立方体代表计算机的最小存储单元
It’s called a Bit.
被称为比特
It stores two different states, or values.
它存储两种不同的状态或值
You can think of this as a true or false,
你可以认为是 真或假
on or off,
开或关
yes or no.
是或否
But most commonly, it’s thought of as a 1 or a 0.
但大多数情况下 它被认为是1或0
Now let’s add another Bit.
现在我们再加上1比特
By changing these two Bits to different combinations of ones and zeros,
通过将这两比特变成1和0的不同组合
we can now store four different values.
我们现在可以存储四个不同的值
Zero Zero, Zero One, One Zero and One One.
00 01 10 11
This is how you count from 0 to 3 in binary.
这就是在二进制中从0数到3的方法
Now let’s add another Bit,
现在再加1比特
you can store 8 different values now.
现在你可以存储8个不同的值了
Each time you add a Bit, you double the amount of information you can store.
每加1比特 你所能存储的信息量翻一倍
Once we get to 8 Bits, we group them together.
有了8个比特时 就把它们划分成一组
This is called a Byte.
称为一个字节
It can store 256 different values.
它能存储256个不同值
A Byte is also enough space to store a single character,
一个字节也有足够空间存储单个字符
such as a letter, number or symbol.
如一个数字 字母 或者符号
Add more Bytes, and we can store larger numbers,
增加更多字节 我们能存储更大的数字
colors,
颜色
and we can even put many characters together to form sentences.
我们甚至能把许多字符放一起组成句子
We’re going to need a lot more Bytes to store something useful.
我们将需要更多字节存储一些有用的东西
When you have 1024 Bytes, we call this a Kilobyte.
我们把1024字节称为1KB
Now you might ask, why the 1024?
你现在可能想问 为什么是1024
Why not 1000?
而不是1000呢?
Hang tight, I’m going to talk about this towards the end of the video.
等下我会在视频的最后讲这个
A Kilobyte is enough space to store a small text document.
1KB已经足够存储一个小的文本文档
To store a low-resolution picture,
要存储低分辨率的图片
you’re going to need somewhere around 100 Kilobytes.
大概需要100KB
Once you get to 1024 Kilobytes we call this a Megabyte.
达到1024KB 就称为MB
One minute of MP3 audio, is about 1 Megabyte.
一分钟的MP3音频大概要1MB
Those old 3.5 inch floppy discs can hold 1.44 Megabytes of information.
那些旧的3.5英寸软盘可以存储1.44MB的信息
A high-resolution picture can be around 5 Megabytes.
一张高分辨率图片大概要5MB
A CD can hold up to 700 Megabytes
一张CD可以容纳700MB
1024 Megabytes is called a Gigabyte.
1024MB被称为1GB
A DVD can hold up 4.7 Gigabytes.
一张DVD能容纳4.7GB
A Blu-ray Disc can hold up to 25 Gigabytes.
蓝光光盘能容纳25GB
A Flash Drive today can hold 32, 64 or 128 Gigabytes.
如今的闪存盘可以容纳32 64或128GB
They’ll probably have something larger by the time you watch this video.
在你看这个视频时 可能还会出现更大的
1024 Gigabytes is called a Terabyte.
1024GB称为1TB
A Hard Drive will be anywhere from 1 to 8 Terabytes.
一个硬盘的容量将在1到8TB之间
1024 Terabytes is called a Petabyte.
1024TB称为1PB
Web servers for companies such as Facebook,
脸书 油管 亚马逊等公司的网络服务器
YouTube or Amazon will be measured in Petabytes.
通常要以PB为单位计量
1024 Petabytes is called an Exabyte.
1024PB称为1EB
The amount of internet traffic every month,
每个月的互联网流量
will be measured in Exabytes.
将以EB为单位测量
After Exabytes, comes Zettabyte
EB之后还有ZB
and then… Yottabyte.
还有……YB
Well, you get the idea, so big, you probably won’t
好吧 你明白了 YB实在太大了
hear to much about Yottabytes for a while…
短时间内你的生活中不会出现YB
maybe someday though…
不过也许总有一天它会出现的
Ok, let’s get a birds eye view of all of this.
好吧 我们来总结一下
8 Bits to a Byte,
8比特是1B
and 1024 for every jump after that.
之后每1024进一级
So there’s 1024 Bytes to a Kilobyte,
所以 1024B就是1KB
and 1024 Kilobytes to a Megabyte and so on…
1024KB就是1MB
So why not 1000?
那么为什么不是1000呢?
Actually, by some definitions it is 1000.
实际上 有时候是1000
But, most of the time we mean 1024.
但多数时候我们说的是1024
Computers like the number 2.
电脑喜欢数字2
If you multiply 2 by itself 10 times you get 1024.
你把2自乘10次就得到1024了
This is why computers like that better.
这就是电脑更喜欢1024的原因
So there you have it,
现在你明白了
next time you hear one of these words,
下一次见到这些词时
you’ll know what it means.
你会知道它意味着什么
My name’s Jared Owen. Thanks for watching.
我是杰瑞德·欧文 感谢观看

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视频概述

存储单位的换算

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视频来源

https://www.youtube.com/watch?v=lo2McnYcTTQ

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