TVBasics.com
Dictionary of TV words

Contrast Ratio, Component and composit video plugs wires, etc. explained

This page has all TV specifications starting with the letter 'C'

CableCard

CableCard is a device that allows you to plug your cable line directly into the TV set without the need for a set-top box. It looks like a credit card, and fits into a special slot built into newer digital TVs. So in effect CableCard replaces the Set Top Box (STB).

Calibration of TV

Calibration of TV is primarily concerned about the color rendition of the TV or in other words how the colors of the image on a TV appears. Experts when they talk about calibrating a TV they talk about color calibration in terms of color temperature. When an object has a higher color temperature, it is referred to as looking "cooler" due to its bluish tint or hue. Conversely, an object with a lower color temperature is called "warmer" due to its reddish tint or hue.

We normally associate red with hot and blue with cold, but when it comes to color calibration it is the opposite. This anomaly has arisen due to the following facts: when an object, like for example, an iron rod is heated and when it reaches a temperature of 2,200 degrees Fahrenheit it will glow red, at 11,000 degrees F it would appear white and at over 17,000 degrees F it would look blue. So an object being heated is red at a lower temperature and blue at a higher temperature.

CAM

A Conditional Access Module (CAM) is an electronic deciphering device used with Smart Cards, to unscramble encrypted DVB (Digital Video Broadcast) signals from DTH (direct to home) or direct-broadcast Satellite (DBS) transmission or Cable TV. Some Digital Terrestrial pay TV transmissions also need CAMs and Smart Cards to unscramble their signals.The CAM is fitted into the Set Top Box (STB) or Satellite Decoder. A Smart Card supplied by the Cable or Satellite TV transmitter has to be inserted into the CAM to unscramble the TV signals and to receive pictures on your TV. Some encryption systems for which CAMs are available are Logiways, Nagravision, Viaccess, Mediaguard, Irdeto, KeyFly, Verimatrix, Cryptoworks, Mascom, Safeview, Diablo CAM and Conax. NDS VideoGuard encryption is used by Sky Digital. Dragon and Matrix CAMs can decypher more than one encryption system.

CEA

Consumer Electronics Association conducts the the Anual CES (Consumer Electronics Show) in January of every year.

CES:

The International Consumer Electronics Show is held in January of every year in the Las Vegas Convention Center, Las Vegas, Nevada, USA. It is here that most electronic entertainment equipment companies introduce and announce their new technologies.

Chrominance:

Chrominance(chroma or C for short) is a signal used in video systems to convey the color information, hue (shade) and saturation (intensity), of the picture.

CINEMA 3D (LG):

LG's CINEMA 3D provides remarkably improved 2D to 3D conversion function which offers more realistic 3D images.

Clear Motion Rate: What Samsung Clear Motion Rate mean

Experience the true meaning of motion clarity with Samsung's Clear Motion Rate. Unlike the "refresh rate." which explains a part of picture quality, Clear Motion Rate determines the motion of an image by using three factors: chipset, TV panel, and backlight. With the new standard in motion measurement and control, you will clearly see the difference.

Color Depth

Also called bit depth, is the number of bits used to represent the color of a single pixel and is referred to as ' bits per pixel' (bpp). The color Depth or resolution of an HDTV is quoted as "8-bit" or "10-bit" and is an indication of how fine the differences can be between different shades of the same color. An 8-bit resolution allows 256 possible shades  (28 = 256 colors) for each of the primary colours Red, Green and Blue. Thus an 8 bit resolution can produce 256 x 256 x 256 = 16.7 million shades of colors. A 10-bit resolution can produce 1024 shades and thus over a billion shades of colors.

Component video

component video cables

Component video consists of three signals. The first is luminance, indicating brightness or black & white information, known as the "Y" component. The second and third signals are the "color difference" signals to show how much blue and red there is relative to luminance. The blue component is "B-Y" and the red component is "R-Y". There is no separate Green signal, since Green colour is inferred from a combination of Y, B-Y, R-Y.
Component Video signals are the best connection you can make for Video signal if you have no HDMI cable available. It is superior to the S-Video and Composite video cables. Component video can carry HDTV signals and so is preferred over S-Video and Composite cables.

Composite video

composite video cable

In 1953 when color television was first transmitted in the USA they needed a compressed signal of all the component video information in one signal for broadcast. This resulted in the 'Composite Video Signal'. Composite Video Jacks and cable are coloure Yellow as in the picture on the left. The problem with Composite signals are that first it compresses the 3 components of the Video signal into one and sends it to the TV. The TV then has to uncompress all of it back into the three components. This leads to loss of quality and the final picture would have lost its sharpness and colors. Composite Video connection should only be made as the very last resort.

ConnectShare Movie: What is Samsung ConnectShare Movie feature

ConnectShare Movie transforms your TV into a home entertainment theatre - simply plug in your USB memory drive or connect your hard disk drive to screen the movies, photos and music stored there.

Contrast Ratio of TV:

The bigger the Contrast Ratio of TV the better it is. As an example a TV with a contrast ratio of 2,000:1 is a better TV than one with a contrast Ratio of 1000:1. Contrast ratio is the ratio of the screen's maximum brightness or the whitest area to the darkest blacks on the screen. For the best Contrast ratio a black object on the TV screen should have no light at all, that is, it should have a value of 'zero'. Therefore the theoretical value for the contrast ratio is 'infinity' which is not attainable. LCD for example has a backlit LCD screen, and for a black object to be shown on screen, the LCD element has to shut off the back light completely. But with the backlight on all the time, some light escapes through the LCD element and reaches the screen. Thus there is some light on the black object and therefore, the Contrast Ratio of an LCD TV is always less than that of a Plasma TV. In Plasma TV, the Plasma elements light up pixel by pixel, and there is no need to have backlight illumination. Modern LCD TV, with many innovations have improved their contrast ratio to a very high level and the pictures are great now, almost as good as that of the Plasma TV.

CRT

CRT stands for 'Cathode Ray Tube' sometimes called a 'Picture Tube' or 'Tube Television' or 'Tube TV'. These were the TVs our fathers used. You can still see some of these TVs, but they are becoming rarer. In US and Europe they have stopped production and sales of these types of TVs completely. CRT TVs disadvantages are that the maximum size available in India is only 29 inches, the picture quality cannot be compared to modern LCD and Plasma Televisions and they are bulky and heavy.

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