之间的区别Cable TV and Digital TV

关键区别 - 有线电视与数字电视

有线电视和数字电视之间的关键区别在于有线电视可能使用模拟信号以及数字信号，模拟信号可能会引起噪音和干扰。数字电视，另一方面，有许多品种，可以使用许多媒体进行传输。由于信号的质量较高，与有线电视相比，数字电视的质量可能更高。

What is Cable TV?

射频被系统用于使用有线电视传递电视节目。这是通过付费订阅完成的。射频通过同轴电缆或光电缆传输。这与广播电视的工作方式有很大不同。电视信号由电视天线传输和接收。与有线电视相关的电缆还可以处理FM收音机，高速互联网和电话服务。模拟电视过去的服务一直在运行，但是2000年之后，有线电视已升级为数字电缆操作。

有线电视是在1970年代首次推出的。与传统的广播电视网络相比，它能够提供更多的渠道。接收者也相对高质量。有线电视是世界上使用最广泛的电视接收媒介之一。通常，饲料直接完成电视或解码器盒。进入家中的电缆能够携带大量信息，您甚至都不会注意到。有线通道将允许每个频道6兆赫。同轴电缆能够携带每个通道带宽多次。每个电缆都支持许多频道。使用较厚，更易于填充的电缆，以便为用户提供高清视频。 As mentioned earlier, these cables are also able to carry broadband internet and digital data for many miles.

卫星提供商通常会提供通过电缆发送给用户的频道。大型卫星菜肴用于接收这些提供商的渠道。这些渠道被捆绑成包装，并转售给订户。

压缩的可用性使服务提供商可以将数千个渠道发送到您的房屋。每个通道每个通道使用6 MHz。MPEG 2 and MPEG 4are the two compressions used in Cable television. This compression mainly aims to eliminate unwanted data while not affecting the picture quality.HD由于此压缩设施，可在有线电视上提供。这些电缆通道通过使用电缆盒进行数字编码和解锁。电缆能够轻松携带所有通道。

Redistribution boxes are used to amplify the signal through long distances. This will simply look like a large splitter. This box enables retransmission of signals over long distance without any significant degradation. Fiber optic cabling is also becoming famous in the recent past as it is able to transfer more data compared with the coaxial cable.

什么是数字电视？

如果您的电视以数字格式收到信号，则称为数字电视。这使公司能够升级声音的质量，更多的频道，转移高清图片，以获取更广泛的频道。与模拟电视相比，上述功能比其前身具有优势。

数字电视还使用户能够与以前的电视互动。数字电视是互动的，并且可以轻松访问与电视相关的信息，以及使用户轻松导航的菜单。数字电视还使用户可以在需要时收听广播并按需观看存档程序。现代数字电视还通过电视支持互联网设施。

Digital TV can be divided into several types. One of them is digital terrestrial. This is a popular form of an upgrade from analog to digital.数字地面is received via your TV aerial making it hassle free. This will ensure less disruption and reduced viewing cost. A simple set up box can be used to view digital TV channel. This is known as the free view. This option gives the user a wide variety of radio and TV program to choose from. The choice of channels can be further upgraded with an additional subscription fee.

数字卫星电视is received via a satellite dish. This is also a popular and widely used option. This does not come with geographical restrictions. Signals are received via satellites that orbit over us. Usually, this type of digital TV will require a subscription. There are also free sat services that do not require a subscription or a sign-up.

数字有线电视使用光纤电缆或同轴电缆以接收信号。图片质量很棒，同时可以收到一系列频道。该方法的缺点是无处不在。

Telephone line digital TVis a digital TV type that is delivered via a telephone line. This facility allows the user to pause programs, record, and playback TV channels. Internet protocol television, also known asIPTV，，，，uses a broadband connection to provide the user with digital television. Examples of such services include Google TV, Apple TV and You view. Customers will be able to pay for subscriptions and access additional features or pay a onetime fee for the setup box.

What is the difference between Cable TV and Digital TV?

信号

有线电视：Cable TV will either use digital or analog signals.

数字电视：数字电视是指向电视供电的信号。与类似物相比，这是一个高质量的信号。

Media

有线电视：Cable TV uses a cable that plugs into the TV or a cable box that receives an analog or digital signal.

数字电视：数字电视是可以通过电缆或空中发出的信号。

Quality

有线电视：有线电视可以使用带有质量和噪音降低的模拟信号。

数字电视：数字电视使用具有高图像和音频质量的数字信号。数字电视可以支持标准定义（SD）或高清（HD）。

Standard definition comes with lower picture quality when compared with higher definition. The high definition will seem more realistic and clean. HD channels will be best viewed on an HDTV. Some channels may not be available via HD and only be broadcast as SD.

好处

有线电视：Cable TV can come in analog or digital, and quality will depend on upon the signal received by the television.

数字电视：数字电视能够支持更多的频道，更多内容和更高的质量。

图片提供：

“HK Cable TV Settop Box 2009 Version” By WiNG – Own work（CC BY-SA 3.0）通过下议院维基梅迪亚

“Digital TV by RT-RK” By Teslicv – in 3ds max（CC BY-SA 3.0）通过下议院维基梅迪亚