1. The miracles of television: from past to future.

2. There are two ways of development of TV
Technologies of
TV-sets
Technologies of a signal transmission

3. Chapter 1: Technologies of TV-sets

4. LCD TFT liquid crystal display thin film transistor
In 1962 Richard Williams of RCA found that liquid crystals had some interesting electro-optic characteristics and he realized an electro-optical effect by generating stripe-patterns in a thin layer of liquid crystal material by the application of a voltage.
LCD TFT technologies based on flat panel made up of any number of color or monochrome pixels filled with liquid crystals and arrayed in front of a light source (backlight) or reflector.

5. Advantages of TFT: Low power application; The horizontal and vertical
sizes expressed in pixels;
Unsurpassed controllability
and quality of the image;
Small time of reaction of pixels;
Good level brightness of colours, contrast, the big corners of visibility;
Long time of operation;

6. Plasma display
The monochrome plasma video display was co-invented in 1964 at the University of Illinois at Urbana-Champaign by Donald Bitzer, H. Gene Slottow, and graduate student Robert Willson for the PLATO Computer System.
This display technologies, using in the work of the phenomenon of the electric category in gas and a luminescence raised by it luminescence.

7. Advantages of plasma: Very high contrast; Good colour rendition;
Enough big diagonals;
High optical permission;
Absence of effect of blinking;
Homogeneous brightness of a luminescence of the screen;
Compactness.

8. SED Surface conduction electron Emitter display
Is a flat panel display technology that uses surface conduction electron emitters for every individual display pixel. The surface conduction emitter
emits electrons that excite a phosphor coating on the display panel, the same basic concept found in traditional cathode ray tube (CRT) televisions.

9. Advantages of SED: High contrast ratio of 100,000:1;
Very low 0.2 milliseconds response time;
Brightness more then 500 cd/m2;
Light and thin glass panels with big diagonals;
Fine colour rendition;
The review corner reaches 170 degrees;

10. OLED Organic Light-Emitting Diode
This technologic light emitting diode (LED) whose emissive electroluminescent layer is composed of a film of organic compounds. The layer usually contains a polymer substance that allows suitable organic compounds to be deposited. They are deposited in rows and columns onto a flat carrier by a simple "printing" process. The resulting matrix of pixels can emit light of different colors.

11. Advantages of OLED:
- Most progressive technology;
Very small weight and dimensions;
Very low consumption;
Possibility of creation of flexible screens;
Absolute corner of the review;
Amazing contrast :1;

12. Chapter 2: Technologies of a signal transmission

13. Analog television
Analog (or analogue) television encodes television picture and sound information and transmits it as an analog signal: one in which the message conveyed by the broadcast signal is a function of deliberate variations in the amplitude and/or frequency of the signal.
An analog television picture is "drawn" on the screen an entire frame each time, in the manner of a motion picture (cinematograph) film, irrespective of the picture content.

14. Principle of Analog television technology Analog television, like all other motion picture systems, exploits the properties of the human eye to create the illusion of moving images. The common frame rate of 24 frames per second is used for motion pictures to create a smooth moving image.

15. In black and white television based on a cathode ray tube (CRT), a single electron beam scans a phosphor screen from left to right and then returns to the top.
The electron beam is brightness-modulated
to create intensity changes which cause the
different shades of grey.
To support color signals contained in the broadcast, a color synchronization signal called a "color burst" is added to the basic black and white information. The original monochrome information is still transmitted in the color signal, and then the color difference information is added on top.

16. Digital television
Digital television (DTV) is the sending and receiving of moving images and sound by discrete (digital) signals, in contrast to the analog signals used by analog TV.
Representation method, used in DTV, is called digital manipulation(on picture)

17. Advantages of digital TV
digital channels take up less bandwidth
DTV permits special services such
as multiplexing (more than one program on the same channel)
Digital signals do not have the problems with snowy or pale images

18. HDTV
High-definition television (or HDTV) is a digital television broadcasting system with higher resolution than traditional television systems
HDTV is digitally broadcast; the earliest implementations used analog broadcasting, but today digital television (DTV) signals are used, requiring less bandwidth due dig toital video compression.

19. HDTV broadcast systems are identified with three major parameters:
Frame size in pixels is defined as number of horizontal pixels x number of vertical pixels, for example 1280 x 720 or 1920 x 1080. Often the number of horizontal pixels is implied from context and is omitted.
Scanning system is identified with the letter p for progressive scanning or i for interlaced scanning.
Frame rate is identified as number of video frames per second. For interlaced systems an alternative form of specifying number of fields per second is often used.

20. Satellite television
Satellite television is television delivered by the means of communications satellite and received by a satellite dish and set-top box. In many areas of the world it provides a wide range of channels and services, often to areas that are not serviced by terrestrial or cable providers.
The first satellite television signal was relayed from Europe to the Telstar satellite over North America in 1962

21. Principles of satellite broadcasting
Satellites used for television signals are generally in either naturally highly elliptical or geostationary orbit 37,000 km (22,300 miles) above the earth’s equator
Uplink satellite dishes are very large, as much as 9 to 12 meters (30 to 40 feet) in diameter.
With satellite television you could have thousands of channels to choose from