Glossary

0-9A B C D E F G H I J K L M N O P-Q R S T U V W X Y Z

0-9 Index

1080p – Is a high-definition video format. The 1080 stands for a picture resolution of 1920 x 1080 pixels. The “p” stands for progressive scan transmission. This is the preferred high-definition video format for picture quality. TV’s with1080p display video at 60 frames per second. The video on most high-definition discs is encoded at film’s native rate of 24 frames per second. For compatibility with most current 1080p TVs, high-definition players internally convert the 1080p 24fps video to 1080p 60fps.

A Index

Aspect ratio – This is the ratio of a television’s width and height. Widescreen televisions have an aspect ratio of 16:9.

Auto-format switching – Most widescreen televisions have an automatic-format switching function which automatically adjusts the display, showing standard (4:3) broadcasts with black bands on either side so the images aren’t distorted on the wider screen.

Auto power-off Is a handy energy-saving feature which automatically switches the TV into a standby mode after a period of idleness.

B Index

Bitrate – Is the rate at which data is transmitted the higher the rate the more data processed per second. The faster data is transmitted the better the picture resolution. Digital video is typically measured in megabits per second (or Mbps) Standard DVD’s is generally 11Mbps; over the air HDTV broadcasts is 19.4Mbps with 36Mbps for HD DVD’s and 54Mbps for Blu-ray.

Blu-ray – Is a high definition DVD format developed by Sony to provide high-definition cinema quality movies on a disc.

C Index

Contrast ratio – Is the ratio of the darkest and the brightest picture on a flat panel television.

Colour resolution – Is measured in colour bit depth and indicates how fine the differences between shades of the same colour are. Most video equipment is 8-bit which equals over sixteen million colours but some televisions use 10-bit which equals over one billion possible colours.

Comb filter – This filter enhances fine detail and eliminates extraneous colours from analog video signals. There are four types of comb filters today but the best is the 3D Digital filter or 3D Y/C filter which results in the best colour purity, a more stable image and eliminates dot crawl and color bleeding.

CRT – Is the Cathode ray tube technology used in traditional TVs.

D Index

DTV – Short for digital television which replaced analog broadcasts, digital includes widescreen, high quality and standard definition.

DVD – Is the traditional method of receiving films on a disc.

DVI – Is a standard Digital Visual Interface used to carry high-definition video from video sources to HD televisions. DVI cannot support audio signals and have been replaced in most televisions with HDMI connectors which carry both video and audio. You can connect a DVI equipped component to a HDMI equipped TV but a DVI connection will not support audio.

F Index

Flat-panel display – Is the general term used for light-weight LCD and Plasma televisions.

H Index

HD compatible – This label means the television has the ability to connect to an HD source and receive HD signals but the screen has a lower resolution than HD ready TV’s.

HDMI – is a High-Definition Multimedia Interface used to carry digital video and multichannel audio signals from sources to HD televisions.

HDMI-CEC – allows HDMI connected components to be operated with a single remote control. Sometimes called EZ-Sync, Anynet+, BRAVIA Theatre Sync, CE-Link and SimpLink.

HD ready – This label means the TV has the minimum screen resolution (at least 1280×720) and digital sockets (HDMI or DVI) to receive and display an HD picture when connected to a HDTV tuner.

High-definition television (HDTV) – HDTV transmits a signal with roughly twice the standard picture resolution as standard-definition television. Generally only 1080-line interlaced (1080i), 720-line progressive (720p), and 1080-line progressive (1080p) broadcasts are considered to be HDTV.

I Index

Interlaced Scan – Is a method of scanning video signals to form an image where the odd numbered half of the 525 scanning lines in a complete picture is scanned every 1/60th of a second and the even numbered half in the next 1/60th of a second to complete the picture every 1/30th of a second. This scanning is an alternative to the progressive scanning process which scans the entire picture and is considered a better process for picture quality.

L Index

LCD (Liquid Crystal Display) – Liquid Crystal Display technology is used to create flat-panel TVs. A “backlight” behind the panel shines light through the liquid crystal cells creating a pattern that forms the picture or image on the screen. Some LCD TV’s use a technology called backlight scanning this involves using a pulsating fluorescent backlight to reduce motion blur.

LED – is short for Light Emitting Diode. These diodes emit a light when an electric current passes through it. LED’s are used as backlights in newer LCD LED lit televisions.

O Index

OLED – is short for Organic Light Emitting Diode and is another new technology used to create flat-panel televisions with an organic film which produce light when an electric current is passed through the film. This technology called electro-phosphorescence is self illuminating and requires no backlighting. OLED televisions are thinner and lighter than LCD or plasma TV’s and require less energy to operate.

Optical output cables – There are two types surround sound connections, coaxial and optical. To use these cables with you DVD player or television the connections must be compatible.

PIndex

Pixel – Stands for picture element and is the smallest element in a picture. The more pixels contained in a screen the higher the picture resolution.

Phono sockets- Red and white sockets used to connect your TV to a stereo amplifier.

Picture enhancement features – These features are designed to make pictures sharper and movement smoother. Sometimes however they may result in a lesser quality picture.

Plasma TV – Plasma technology creates a picture with hundreds of thousands of tiny fluorescent cells that emit ultraviolet light sandwiched between two glass panels.An electric current causes the tiny cells to glow. The glowing cells create the TV picture.

Progressive scan – unlike interlaced scanning the progressive scan displays the entire frame in a single sweep. Progressive scans have better picture quality with more detail and less flickering. Most digital TV’s today use progressive scan technology rather than interlaced scanning.

R Index

Rear-projection TV’s – Or big screen TV’s create an image with digital technology that is projected onto a mirror which then reflects the picture onto the screen.

Refresh Rate – Refers to the frames per second that the digital display technologies progressively scan. The refresh rate is usually expressed in Hertz (Hz) or frames per second (FPS). One Hz equals one frame per second. The standard rate is 60Hz; some HDTV’s double that with newer technology to 120Hz or even 240Hz both make the picture smoother and more fluid than the 60Hz.

Resolution – Is the measure of the detail provided by a video signal. More pixels generally mean higher or better resolution. The quality of the picture depends on the resolution of the TV and the resolution of the video signal. To find your televisions resolution you multiply the number of horizontal pixels by the number of vertical pixels.

S Index

S-video input –Slightly inferior to Scart RGB inputs an S-video input can be used to plug AV equipment directly into your TV if you are short of Scart inputs.

Scart sockets – Scart sockets carry the higher quality RGB video signal (RGB signals give the best analogue pictures) and widescreen switching information that tells your TV when to switch between conventional and widescreen formats. Scart sockets can be used to link your recorder to your TV. Ideally you want to always use Scart sockets that carry RGB signals. Most TV’s come with two sockets. If you need more you can but a Scart switching box to create more sockets (make sure the switching box supports the RGB signal).

U Index

UHF loop through- A UHF loop through allows you to record a digital programmes while watching an analogue programme or record an analogue programme while watching a digital programme.

V Index

VGA Input – This lets you connect your PC to your TV turning your TV into a PC monitor.

X Index

x.v.Colour– sometimes called xvYCC colour space this is a measure of the number of colours the television will support however there are few sources that broadcast with x.v.colour so even if your television supports x.v.colour you won’t see the wider colour range unless you are receiving signals from a high-def source that supports it.