Analog TV Digital Transmission

Remember the old days of analog TV, radio, etc. Most of us do unless you're really young. And still today there are plenty of analog systems in use. Normal radio still uses analog transmission. But the digital age has begun and more and more we will use digital systems rather than analog systems. Digital transmission systems have many advantages over analog transmission systems, like higher quality of audio and video. How come digital systems can transmit higher quality signals than analog systems? The truth is that they don't. They just use some tricks to eliminate noise.

Analog Transmission Systems

When something like video and audio, is recorded by an analog system, the recording has a certain quality. This recording (when done professionally) has a very high quality. When the recording is transmitted it is modulated directly to a carrier wave, which is then transmitted through the air, cable, via satellite, etc. During this transmission, the carrier and the modulated signal will loose amplitude (power) and due to interference noise is introduced to the carrier and its modulated signal. The result will always be a received signal that has a lower quality than the transmitted signal. Hence, the modulated signal, the recording, will also be of lower quality than the original.

Analog transmission systems are unable to maintain the quality the original has.

Digital Transmission Systems

In the digital world the recording can be transmitted to another place without loosing any quality. An exact copy of the original recording is transmitted. So how come that digital transmission systems don't loose quality when transmitting a signal?

Well..... Actually they do lose quality just like the analog transmission system does.

Surprised? No Problem. Most people don't know that digital signals still need to be transmitted by analog transmission systems. The trick is that a digital system doesn't record analog signals, but encodes analog signals into bits (zeros and ones). A sample is taken many times per second and the size of each sample is written down in bits. For instance a sample with the value of 9 would be 1001 and 11 would be 1011.

The digital transmission system needs to transmit those zeros and ones, and it does this by modulating the carrier wave. Low power for a 0 and high power for a 1 (This is the most simple way of modulating. There are much more sophisticated forms of modulation, but it would take a whole book to describe them all.)

So on the receiving end, it doesn't matter anymore what the quality of the signal is, as long as it still is possible to identify the zeros and ones. Noise in the received signal is no problem. A "1" with noise is still a "1" and a "0" with noise is still a "0". Of course the noise can not be too high, otherwise mistakes would be made and a zero would be received as one or a one would be received as a zero.

So Digital Transmission Systems are better because they eliminate the effect of noise completely. You don't look and listen to a received signal from an original recording, but you look and listen to a reproduced signal of the recording. The reproduction comes from an exact copy of the original recording.

The quality of what you see and hear now depends on your TV and Sound System. A high quality TV and Sounds System will give you high quality Video and Audio. The negative effects of the (still analog) transmission have been eliminated from the process.

Satellite TV makes use of Digital Transmission Systems. What you see at home will always be of Digital no (much less) noise Quality.

About the Author: Gary Davis has many years experience in the Satellite TV Industry and has written numerous articles on the topic. You can learn more about satellite television at Dish Network Satellite TV (http://www.dish-network-satellite-tv.ws).

---

A Guide to Buying Your Next TV

It used to be simple; when you bought a new... Read More

Insiders Review on Satellite TV Deals: Must Read For Those Who Are Looking For Free Satellite TV

Nowadays, I am sure that you are seeing ads for... Read More

Satellite TV Deals FAQ

Satellite TV 'What'?So, what is a satellite TV?It's a complicated... Read More

Troubleshooting your Cable Box

Unless you've recently moved from Alaska to Texas and you're... Read More

How to Shop for Satellite TV Receivers and Dishes

It's undeniable - shopping for a new satellite tv system... Read More

In the know: Dish Network DVR

What's a DVR system and what else can it brings... Read More

Church Projector and Church Projector Systems

Purchasing a church projector for your Sunday morning services will... Read More

Satellite TV Comparison Shopping Made Easy!

DirecTV vs. Dish Network and Satellite TV vs. Cable TVWith... Read More

A to Z in Dish Network deals

First, what's Dish Network?Dish Network, owned by company Echostar, is... Read More

How Satellite TV Works

Have you ever wondered how satellite TV works? With over... Read More

Troubleshooting Your Dish Network Receiver

It has happened to all of us. It's fourth and... Read More

Plasma Compared To DLP Television and LCD

When you think of comparing plasma to DLP technology you... Read More

Selecting a Satellite TV Network from the Audiences Perspective

The numbers of those who just connect their TV to... Read More

Analog TV Digital Transmission

Remember the old days of analog TV, radio, etc. Most... Read More

Home Theater Control ? Its The Remote, Stupid!

It's the one piece of equipment that can really make... Read More

The Benefits of Satellite Television!

Most teenagers today won't remember what the entertainment world was... Read More

Dish Network vs DirecTV: Which Satellite Broadcast Provider Offers the Better Deal?

Whenever someone mentions about satellite TV in United States, Dish... Read More

The Potential Conundrum of Regulating Pay-TV

In last week's column, I argued the merits (or rather... Read More

Direct TV Receiver

When a customer receives Direct TV programming, he or she... Read More

Why Satellite TV is better than Cable TV

Satellite TV is Making the Cable Companies Run ScaredSatellite TV... Read More

Dish Network Vs. DirecTV - Race For Top Is On

If you have taken sane decision to replace your cable... Read More

Free Satellite TV -- Myth or Real?

Free satellite TV is the biggest myths on the internet,... Read More

How to Select a Video Display for Your Home Theater

First of all, don't assume you need a huge video... Read More

Cable TV And Satellite TV - Which Is The Better System?

Cable TV and satellite TV - which is the better... Read More

Satellite TV

Here is some information about satellite TV.Satellite television or satellite... Read More

LCD vs. DLP TVs

Two new technologies in the world of TV, DLP and... Read More

Satellite TV vs. Cable TV -- Which is Best?

The move is on. Last year millions of Americans switched... Read More

HDTV and the iPod Photo: A Perfect Marriage?

They may seem like an odd combination, but the iPod... Read More

No More Searching for the Best Satellite Products

You need the best satellite products for your home and... Read More

The Path of United States HDTV World

The history of High definition television, HDTV in United States... Read More

DirecTV and DISH Network ? How Do The Two Leading Satellite TV Providers Stack Up?

DirecTV and DISH Network ? How... Read More

No More DirecWay? I Believe the writing is on the wall...

As one who has been directly involved in selling DirecWay... Read More

Direct TV Deals a Blow to Unhappiness in Marriage

You might be surprised to learn that television is one... Read More