Name: 為什麼藍牙還是這麼爛？(Why Does Bluetooth Still Suck?)
Uploaded: 2018-09-13T21:01:10.000Z
Duration: 3 min 46 s

have gotten rid of the headphone jack from their phones.

This is pushing people towards wireless headphones,

這使得消費者轉向使用無線耳機

Its got a short range, devices disconnect randomly

它的有效範圍很短，裝置很容易忽然斷線

Even thought it's been around for 20 years, why does Bluetooth still suck?

儘管藍芽技術已有約 20 年的歷史，但到底為什麼還是這麼爛？

Bluetooth is a wireless standard used all around the world.

藍芽技術是一種世界通用的無線標準

Wireless printers, keyboards, game controllers,

無線的印表機、鍵盤、電玩搖桿、

麥克風和耳機...等，皆是運用此技術

It was created by a group of engineers in the mid '90's

藍芽技術是在 90 年代由一群工程師所發明

as a secure way to exchange data between devices,

是裝置間傳輸資料的一種安全方式

10th century viking king Harald Gormsson who,

十世紀維京國王哈拉爾德高姆森

該國王的事蹟和藍芽的概念很相似

unified two separate entities, Denmark and Norway.

他統一了丹麥和挪威兩個分離的政體

which translates from Danish to Bluetooth.

而該詞從丹麥文翻譯成英文即為藍芽

The logo comes from the initials of King Harald Blatand.

藍芽的標誌來自於國王哈拉爾德布萊登名字的兩個首字母

It is a combination of the runic letters H and B.

是古北歐文字 H 和 B 字母的結合

Bluetooth uses the 2.4 gigahertz frequency

藍芽使用的是 2.4 百萬赫茲的頻段

This frequency and a few others are referred to

此頻段和其他少數幾個頻段統稱為

這類頻段不需要經過美國聯邦通訊委員會

to have an FCC license to operate on them.

This makes the band attractive to manufacturers

這對許多製造商而言是一大利多

because they don't have to deal with the FCC.

如此便不需要花功夫和美國聯邦通訊委員會打交道

Because of this, the ISM is brimming with devices.

也鑒於此因素，許多裝置都支援 ISM 頻段

And they all interfere with your Bluetooth devices.

而這些裝置會和你的藍芽裝置互相干擾

Class one, for long range, these need a power supply,

等級 1: 用於較長傳輸距離，需要電力供應

and are mainly used for industrial purposes.

Class two, they have a range of about 30 feet.

等級 2: 有效傳輸距離約 30 英尺

This is what most cellphones and speakers use.

此等級是大多數手機和藍芽喇叭所使用

Class three devices have a range of less than 30 feet.

等級 3:  有效傳輸距離小於 30 英尺

若同時，附近又有來自其他裝置的電波干擾

Bluetooth also transfers data much slower than WiFi does.

藍芽的資料傳輸速度也比 WIFI 慢很多

While devices connected via the new WiFi Direct standard

will be able to transfer data at 250 megabits per second,

可以每秒 250 MB 的速度傳輸資料

There's no superfix for these issues coming anytime soon.

But if you want to improve the connection

如果你想要改善兩個裝置間的連線狀況

between two devices, there are a few things you can do.

Keep the devices as close together as possible.

Or even use a device that can amplify a Bluetooth signal.

或甚至你可以使用可以放大藍芽訊號的裝置

總而言之，目前仍沒有確定有效的方式

some companies are taking matters into their own hands,

有些公司已開始自行尋找解決之道

developing technology that works a lot like Bluetooth.

例如蘋果 的 W1 晶片可使所在的 AirPod

to switch to whatever device you're using,

take wireless communication into their hands?

也開始自行開發無線通訊技術呢？

字幕列表影片播放

為什麼藍牙還是這麼爛？(Why Does Bluetooth Still Suck?)

improve

spectrum

interfere

develop