Question

通信专业英语翻译

In a typical system the transmitter terminal will contain an input transducer which converts the speech pressure waves in the air into an electrical signal. This input transducer is commonly called a microphone. Similarly, within the received terminal is a loudspeaker, i.e., an output transducer which converts the received electrical signal back into sound. The transmission channel is the medium by which the electrical signal is conveyed from the transmitter terminal to the receiver terminal. The people who provide the input sound by speaking into the microphone and receive the sound after transmission by listening to the loudspeaker are called the communicators. In practice the transmitter or receiver terminal will probably contain an amplifier. This then guarantees that even a small sound at the input to the transmitter microphone will produce a sound at the output of the receiver loudspeaker. In order to discuss examples and illustrate their properties we must introduce some extra terminology and make some definitions. We begin by looking at the electrical signals which will be conveyed through our telecommunications system.

Answer 1

我来试试吧 我也是电子专业的
在一个典型的系统发射机终端(我们一般叫发射终端)将包含一个输入传感器，它把空气中讲话压力波转化成电波信号。该输入传感器通常称为麦克风。同样地，扬声器可以看成是接收终端.输出传感器是将接收到的电波信号转换成声音。传输通路指的是一种媒介.电波通过该媒介从发射终端传输到接收终端。所谓的交流者指的是通过向麦克风说话提供声音信号,再由扩音器获得传送过来的信号。在实践中，发送器或接收终端将可能包含一个放大器。这就保证了即使即使声音信号很小. 也可以传送出可辨别的信号给扩音器.为了讨论的例子，说明他们的财产，我们必须引进一些额外的术语，并提出一些定义。首先，在我们将从电信系统的电波信号开始.

其实这段话讲的就是输入和输出. 大概意思是 麦克风是将声音信号转化成电波信号, 而扩音器是讲电波信号转为人类可识别的声音信号.而加入放大器的原因是有时候 获得的声音可能会比较小. 放大器可以放大获得的信号.. 通过处理之后, 我们就比较能够获得一些识别度高一点的信号. 这样就可以转化成质量较高的信号了...

额 希望我解释的够清楚

Answer 2

chixiaohou说得很对！

Answer 3

楼上的大哥真是厉害,竟然能够把Bill
Gate's
的Gate
翻译成了大门啊!(比尔盖次)我下面的都是很认真翻译的,不会有错的啊!
Much
of
Gate's
success
rest
on
his
ability
to
translate
technical
visions
into
market
strategy,and
to
blend
creativity
with
technical
acumen.He
has
accumulated
one
of
the
world's
largest
personal
fortunes
from
his
holdings
of
Microsoft
stock
and
is
known
for
his
personal
and
corporate
contributions
to
charity
and
educational
organizations.Gates
continues
to
be
personally
involved
in
product
development
at
Microsoft.His
willingness
to
back
new
technologies
such
as
Microsoft
Windows,Windows
NT,and
workgroup
applications
has
kept
Microsoft
at
the
forefront
of
computer
hardware
and
software
evolution.
盖次的大部分成功取决于他能够将技术方面的东西转换成市场战略和把创造跟技术融合等两个方面的能力!他已经从他的微软股份中聚集成为世界上个人财富最多的人之一，还因为他的个人的和公司的贡献而知名于慈善团体和教育机构。盖次在微软的贡献主要在产品开发。他积极的想回到做那些能够微软的软硬件在变更中处于并保持世界前列的新技术开发像Microsoft
Windows,Windows
NT等操作系统和工作组的应用程序。
Other
product
areas
include
local
area
network
systems
that
link
comptuters,and
hardware,such
as
the
Microsoft
Mouse
pointing
device
.Microsoft
also
produces
datebase
software,such
as
Microsoft
Access,and
multimedia
applications
that
range
from
child's
products
to
reference
materials.
The
company
publishes
computer
related
and
technical
books
th
rough
its
Microsoft
Press.
其它的产品领域括局能够连接电脑的包域网系统和硬件比如微软鼠标定点器等。微软也生产数据库比如Microsoft
Access和多媒体应用程序从小孩的产品到相关参考资料。公司以微软出版社的名义出版电脑相关的书籍和电脑技术书籍。

Answer 4

"Communication
Engineering
professional
training
with
communications
technology,
communication
systems
and
communication
networks,
and
other
aspects
of
knowledge,
in
the
field
of
communications
in
the
research,
design,
manufacture,
operation
and
the
various
departments
in
the
national
economy
and
national
defense
industry
in
the
development
and
application
of
communication
technology
and
equipment
senior
engineering
and
technical
personnel.
The
students
mainly
study
communications
systems
and
communication
networks
in
basic
theory,
principles
of
composition
and
design
methods,
communications
engineering
practice
by
the
basic
training,
have
engaged
in
modern
communication
systems
and
network
design,
development,
test
and
engineering
applications
for
the
basic
abilities
.
"

Answer 5

8.2HDTV（高清晰度电视）基本概念
高清晰度电视的基本概念实际上并不是提高每个单元域的清晰度，而更多是提高图像中包括的可视域的百分比。
模拟和数字HDTV的要素是朝每帧在1000行有1000个水平点发展。这个会导致在垂直和水平域的角度有2-3个点的提高。HDTV方案要素还把屏幕高宽比从4/3改为了16/9，让图像更像“电影模式”。
注意：图像的屏幕高宽比定义为图像的宽W和它的高H的比值。最佳观看距离（用图像的高H表示）是眼睛刚好能觉察到图像的细节元素的距离。
8.3
HDTV的问题
8.3.1
带宽限制
一个模拟录制频率周期最多可以提供两个像素信息。（注意：这是最多----一个周期可能容易引起争议。只能提高一个像素的全录制信息！）
传统的NTSC图像以29.97HZ频率提供525行427像素的水平解析度。这最少需要3.35MHZ（假设每个录制周期2个像素）带宽来承载无压缩电视信息。
如果把HDTV图像提高到每1050行600像素（保持同样的帧速率），那意味着需要18MHZ的带宽，很明显会有问题---因为现有的陆地信道分配限制在6MHZ。
（题外话，“陆地”这个词对于电视专业人员来说意味着无线电视传输。这是为了和卫星及有线传输区别开来）
陆地广播（假设20M带宽）大概有以下这几种可选项：
1．
把信道分配系统从6MHZ改到20MHZ；
2．
在现有6MHZ带宽里把信号进行压缩来适配；
3．
分配多信道（2个压缩的或3个不压缩的）给HDTV信号。
方案1和2与现有NTSC业务事实上是不兼容的。保持兼容唯一的可能是在特定的信道广播NTSC信号，而在其它信道广播HDTV信号。
方案3确实解决了兼容问题----因为开始的6MHZ频段可用于NTSC广播标准，其它增加的信道用于HDTV信号。具体来说，在这个改进的系统中，一个现有的VHF（Very
High
Frequency，特高频）信道可以绑定一个（或两个）UHF（UltraHigh
Frequency，超高频）信道，一个VHF信道可以承载类似现有NTSC信号的信息，一个UHF信道（或多个）可以承载增加的高清信号信息。