The 7 Best Technologies Of The Colour Television

Televisions

TV standards
The standard adopted by the U.S. was called NTSC, which was for National Television Standards Committee. NTSC is the television standard in the United States, Canada and Japan.
Germany has developed the television standard PAL Appeal, which was to line Alternating phase, and was introduced in 1967. PAL is the television standard in the United Kingdom, much of Europe, Africa, Australia and parts of South America.
The French developed in 1967 the television standard called SECAM, Sequential Couleur Avec Mémoire, French for "sequential color with memory." norm SECAM is used mainly in France and Eastern Europe "Warsaw Pact" countries.
There are different types of television systems:

TV terrestrial
NTSC, PAL, SECAM and analog PAL2
Satellite television use digital signaling standard
TV Cable
both analog and digital systems are available.
MMDS (wireless cable)

image format
All these TV systems before they shared the same aspect ratio of 4:3, which was determined by the technology of cathode ray tube manufacturing of time – the current technology CRT allows the production of larger tubes. However, due to the negative health effects associated with the heavy metal removal from cathode ray tubes in landfill and the attributes of space saving technology of flat panel with no aspect ratio limitations of CRTs, CRT monitors are obsolete.
The transition to digital television systems to coincide with a change of image format of 4:3 aspect ratio (1.33:1) aspect ratio to 16:9 (1.78:1). This allows the TV to get closer to the aspect ratio of films, ranging from 1.85:1 to 2.35:1. The 16:9 format was introduced to "widescreen" of video and DVD. The technical implementation of current uses pixels 16:9 screen 4:03 same video in full screen anamorphic format.
There is no technical reason for this change in aspect ratio accompanied by the introduction of digital television, but it was decided to synchronize these changes for marketing purposes.

Aspect ratio incompatibility
A large image on a conventional screen can be demonstrated:
letterbox with black bands above and below
with the extreme left and right the image of falling (or "pan and scan" "The pieces selected by the operator)
with the horizontally compressed image
A classic on the big picture screen can be demonstrated:
with the black pieces left and right
with the top and bottom of the image of the fall
with the image horizontally expanded
A common compromise is to shoot or create material at an aspect ratio of 14:9, and lose a certain image of each side for 4:03 presentation, and an image at the top and bottom for 16:9 presentation.
In a room where many people see a TV, the horizontal expansion is not as bad as a reward for observation at an oblique angle.

New Developments
Digital television (DTV) – High Definition TV (HDTV) – Pay Per View – Web TV – programming ON DEMAND.

Televisions
Television sets were radios with the addition of a television above, consisting of a neon tube with a mechanical rotation of the disk (the Nipkow disk, invented by Paul Gottlieb Nipkow) that produces a seal of red image size. The first public issue of services e was in Germany in March 1935. It had 180 lines of resolution and was only available in 22 public viewing rooms. One of the first emissions of key stakeholders in the Berlin Olympics in 1936. The Germans had a 441 lines in the fall of 1937.
From the earliest days the medium, television has been used as a vehicle for advertising. Since its inception in the 1940s, TV commercials have become far more efficient, the most common and popular selling products of all kinds. The advertising rates are determined primarily by Nielsen ratings
The use of TV soared after World War II technological advances related to the war and additional disposable income. (Television receivers of the 1930s cost the equivalent of $ 7000 today (2001) and there were few programming data.)
form of television in its original and still the most popular is to send pictures and sound by radio waves in VHF and UHF, which are received by a receiver (television). In this sense, is an extension of the radio.
TV color became available on December 30, 1953, sponsored by CBS. The government approved the color broadcast system proposed by CBS, but when it came RCA with a system that allowed them to see color broadcasts in black and white televisions unmodified old black and white, CBS lost its own proposal and used the new.
Since the 1990s, modern television sets are split into three different trends:
Independent TV
integrated systems with DVD players and / VHS or integrated into the TV itself (especially for smaller TV with a maximum of 17 ", the main idea is to have a complete portable);
component systems with screen monitor, a tuner, an audio system that connects the pieces owned by a home theater system up range. This approach appeals to videophiles who prefer components that can be upgraded separately.
There are many types of video monitors used in modern televisions. The most common are direct view CRTs up to 40 "(4:3) and 46" (16:9) diagonally. Most big-screen TVs (to 100) use projection technology. There are three types of projection systems are used in projection TVs: CRT-based chip LCD images and reflection on the base. Modern advances have allowed dishes on TV screens that use active matrix LCD or plasma display technology. Flat screens are only 4 "thick and can be hung on a wall like a painting. They are extremely attractive and discreet, but they remain expensive.
Today, some TVs include a port for connecting peripherals to it or connect your A / V home network, and LG RZ-17LZ10, which includes a USB port, where you can connect a mouse, keyboard and so on (very interesting for WebTV).
Even for simple video, there are five standard ways to connect a device. These are:

Component Video-three separate connectors, with a brightness channel and two color channels, and is commonly known as Y, BY, RY or Y Pr Pb This gives images high quality and is generally used in professional studios. But the theater is used in most home for DVDs and high-quality sources. The audio is not transmitted cable.

A large 21-pin SCART connector, which can lead to composite video, S-video or better quality, red, green and blue (RGB) and two audio channel signals, and a series of control signals. This system is the norm in Europe but rarely elsewhere.

S-Video and two separate channels, a lot of the color brightness carried. Video Also known as Y / C. Provides most of the benefits of component video, with color fidelity a little less. The use began in the decade 1980 for SVHS, Hi-8 and the beginning of DVD players to transmit high quality video. Audio is not in the cable.

Composite video-The most common connecting external devices, putting all the video information in a single sequence. Most televisions provide this option with a yellow RCA cable. Of audio is not in the cable.

Coaxial or RF (coaxial cable) – All audio channels and components of the images are transmitted via cable and a frequency modulated radio. Most TVs manufactured during the past 15-20 years accept coaxial connection, and the video tends to be "tuned" to channel 3 or 4.

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