在线英语听力室

什么叫“蓝牙”(一)

时间:2006-08-19 16:00:00

(单词翻译:单击)

 

  What is Bluetooth?

  Bluetooth is a universal radio interface1 in the 2.45GHz frequency band that enables portable electronic devices to connect and communicate wirelessly2 via short-range, ad hoc networks. Each unit can simultaneously3 communicate with up to sever4 other units per piconet. Moreover, each unit can simultaneously belong to several piconets.

  蓝牙是一个频率为2.45GHz的通用无线电通信接口,它通过一个特殊的网络可以在各种便携设备之间建立起无线连接并进行短程通信。在一个微微网中,每个单元都能同时与其它各单元进行通信。而且,每一个单元可以同时属于几个微微网。

  What is Bluetooth Technology?

  什么是“蓝牙”技术?

  Bluetooth technology which apart from Ericsson, has gained the support of Nokia, IBM, Toshiba, Intel and many other manufacturers.

  Eliminates the need for wires, cables and connectors for and between cordless or mobile phones, modems5, headsets, PDAs, Computers, printers, projectors6, local area networks, and so on, and paves the way for new and completely different devices and applications.Technology Characteristics—1Ms/s symbol rate exploits maximum available channel bandwidth.

  “蓝牙”技术最先是由爱立信开始研制的,现在已经得到了诺基亚、IBM、东芝、因特尔及许多其它相关制造厂家的支持。其目的是为了免除在无绳电话或移动电话、调制解调器、头套式送/受话器、PDAs、计算机、打印机、幻灯机、局域网等之间加装电线、电缆和连接器。而且,这种技术可以延伸到那些完全不同的新设备和新应用中去。“蓝牙”的技术特性—以每秒1M个码元的字符速率传输,充分利用信道的最大有效带宽。

  Fast frequency hopping avoids interference

  Adaptive output power minimizes interference

  Short data packets maximize capacity during interference

  Fast acknowledge allows low coding overhead for links

  CVSD(Continuous Variable Slope Delta Modulation)voice coding enables operation at high bit- error rates

  Flexible packet types supports wide application range

  快速跳频避免干扰

  可变的电源输出使干扰减小到最小

  采用短数据包传输增强抗干扰能力

  快速确认允许有附加低速率的编码被发送到链路上

  连续可变斜率增量调制的语音编码可以在高误码率的情况下正常工作

  灵活的分组类型支持多种应用


分享到:


点击收听单词发音收听单词发音  

1 interface e5Wx1     
n.接合部位,分界面;v.(使)互相联系
参考例句:
  • My computer has a network interface,which allows me to get to other computers.我的计算机有网络接口可以与其它计算机连在一起。
  • This program has perspicuous interface and extensive application. 该程序界面明了,适用范围广。
2 wirelessly 9cf7b6b54adbdbcf4be7f6db9924bae9     
不用电线的,用无线电波传送的
参考例句:
  • I heard it on the wireless. 我是从无线电收音机里听到的。
  • There are a lot of wireless links in a radio. 收音机里有许多无线电线路。
3 simultaneously 4iBz1o     
adv.同时发生地,同时进行地
参考例句:
  • The radar beam can track a number of targets almost simultaneously.雷达波几乎可以同时追着多个目标。
  • The Windows allow a computer user to execute multiple programs simultaneously.Windows允许计算机用户同时运行多个程序。
4 sever wTXzb     
v.切开,割开;断绝,中断
参考例句:
  • She wanted to sever all her connections with the firm.她想断绝和那家公司的所有联系。
  • We must never sever the cultural vein of our nation.我们不能割断民族的文化血脉。
5 modems 7dfd3123423241813aecfaaf398ecb0b     
n.调制解调器( modem的名词复数 )
参考例句:
  • Yes, floppy day, as did 9600 baud dial up modems. 是的,当时软件是最主要的工具,还有9600波特拨号调制解调器。 来自互联网
  • Extra settings for configuring BAD modems that cannot identify proper disconnect tone. 额外的设置,配置不好的调制解调器不能确定适当的断开的语调。 来自互联网
6 projectors c83fdd343934671c4604431c99b02a44     
电影放映机,幻灯机( projector的名词复数 )
参考例句:
  • Energy projectors fired and peeled off the ships' armor in a flash. 能量投射器开火然后在一阵闪光后剥离了飞船的装甲。
  • All classrooms equipped with computers, projectors, video and audio booth, broadcasting equipment. 全部教室配备电脑、投影仪、视频展台和音响、广播设备。