invention: TV

I invent it John Logie Baird, it is an apparatus to see images in movement, the first television came out in 1925, and in 1928 the experiments are developed to transmit in color, because to color it was very expensive and they had to be compatible with the monochrome receivers and at the end of the century twenty the television becomes a technological flag and each one of the countries development its system the national and private tv. today in day the tv is very important since he informs us of what passes in its city, country and the rest of the world.

Types of television:

analogue broadcasting:

The television until recently, early XXI century, was completely analog and way to reach viewers was through the air with radio waves in the VHF and UHF bands. Soon came the cable networks that distributed channels cities. This distribution is also done with analog signal cable networks may have assigned a band, mostly to perform the tuning of channels coming through the air along with the cable coming. Its development depends on the laws of each country, while some of them developed rapidly, as in England and the United States, in others like Spain have had almost no importance until the late twentieth century legislation allowed installation.

digital Broadcasting:

These forms of dissemination have remained with the birth of digital television with the advantage that the signal type is very robust to interference and the emission standard is designed for good reception. We must also say that accompanies the television signal a number of extra services that give value to the program and that the regulations have included a whole field to carry the pay TV in its various forms.

Satellite TV:

The satellite broadcasting began with the development of the space industry which enabled geostationary satellites into orbit with transducers that emit TV signals that are picked up by satellite dishes.

IP Television (IPTV):

The development managed IP network, based on customer access thereto via xDSL or fiber optics that provide high bandwidth and increased data compression capability of the MPEG type algorithms has made possible the distribution of the television signal in digital form using IP encapsulated.

The 3D TV:

Stereoscopic vision or stereovision is a known technique used in photography and early twentieth century. At the end of the century the cinema in 3D, in three dimensions, was as usual and was marketed. At the end of the first decade of the century began to see the first commercial television systems based 3D capture, transmission and representation of two similar images displaced relative to each other and polarized. Although experienced some system without need glasses polarized filters to see these images in three dimensions, such as the Philips home, existing systems, based on the same principle as the 3D cinema, require the use of filters color, red for the right eye and cyan for the left eye.