Television technology Television technology (405-line) 405 line is the name of a monochrome analogue television broadcasting system in operation in the UK between 1936 and 1985, and also used for some time in Ireland and Hong Kong. The system was invented in 1934 by Alan Dower Blumlein of the EMI Research Team led by Sir Isaac Shoenberg. The 405 scanning lines are roughly equivalent in modern terminology to a vertical resolution of 360 pixels. ...more on Wikipedia about "405-line"
8-bit colour graphics is a method of storing image information in a computer's memory or in an image file, such that each pixel is represented by one 8-bit byte. The maximum number of colours that can be displayed at any one time is 256. ...more on Wikipedia about "8-bit color"
Aerial Video Systems (AVS), founded by Randy Hermes, is a television and film equipment rental company located in Burbank, California. AVS supplies turnkey production packages and engineers to larger broadcasting corporations. AVS speacializes in point-of-view cameras, helmet cameras, television golf and marathon coverage, aerial video, and digital microwave broadcasting. ...more on Wikipedia about "Aerial Video Systems"
The Apple Interactive Television Box was a set-top box developed by Apple Computer in partnership with British Telecom. Prototypes of the unit were tested in parts of the United States and Europe in 1995, but the product was canceled shortly thereafter, before ever being mass produced or marketed. ...more on Wikipedia about "Apple Interactive Television Box"
The Advanced Television Systems Committee (ATSC) is the group that helped to develop the new digital television standard for the United States, also adopted by Canada, Mexico, and South Korea and being considered by other countries. It is intended to replace the NTSC system and produce wide screen 16:9 images up to 1920×1080 pixels in size—more than six times the display resolution of the earlier standard. However, a host of different image sizes are supported, so up to six standard-definition " virtual channels" can be carried in a single broadcast. ATSC also boasts " theater quality" audio because it uses the Dolby Digital (AC-3) format to provide "5.1" surround sound. Numerous auxiliary data services can also be provided. ...more on Wikipedia about "ATSC"
ATS euro plus is an automatic tuning system for convenient initial adjustment of the television set with sorting and channel identification specification in fixed sequence. ...more on Wikipedia about "Automatic Tuning System euro plus"
In the context of broadcast television, backhaul refers to program content that is transmitted to a television station or receiving entity where it will be integrated into a finished show. The term is independent of the medium being used to send the backhaul, but satellite transmission is very common. ...more on Wikipedia about "Backhaul"
A big ugly dish (often abbreviated to BUD) is a colloquial name for a satellite dish used to receive satellite television signals from FSS-type satellites on the C band, BUDs are usually about ten feet or three metres in diameter and have been a source of much consternation (even local zoning disputes) to neighbors of those with the dishes. Although some dishes are made of fiberglass, a common alternative is a metal mesh – such BUDs shed snow and suffer reduced wind loads; in addition, some critics consider them less unsightly. ...more on Wikipedia about "Big ugly dish"
Video black level is the defined as the level of brightness at the darkest (black) part of a visual image or the level of brightness at which no light is emitted from a screen, resulting in pure black. ...more on Wikipedia about "Black level"
There are several broadcast television systems in use in the world today. An analogue television system includes several components: a set of technical parameters for the broadcast signal, a system for encoding color, and possibly a system for encoding multi-channel audio. In digital television, all of these elements are combined in a single digital transmission system. ...more on Wikipedia about "Broadcast television system"
Cathode rays are streams of electrons observed in vacuum tubes, i.e. evacuated glass tubes that are equipped with at least two electrodes, a cathode (negative electrode) and an anode (positive electrode) in a configuration known as a diode. ...more on Wikipedia about "Cathode ray"
The cathode ray tube or CRT, invented by Karl Ferdinand Braun, is the display device that was traditionally used in most computer displays, video monitors, televisions and oscilloscopes. The CRT developed from Philo Farnsworth's work was used in all television sets until the late 20th century and the advent of plasma screens, LCDs, DLP, OLED displays, and other technologies. As a result of this technology, television continues to be referred to as " The Tube" well into the 21st century, even when referring to non-CRT sets. ...more on Wikipedia about "Cathode ray tube"
Ceefax (phonetic for "See Facts") is the BBC's teletext information service. ...more on Wikipedia about "Ceefax"
CGMS-A (Copy Generation Management System Analogue) is a copy protection mechanism for analog television signals. It also is commonly referred to as the Broadcast flag. ...more on Wikipedia about "CGMS-A"
A channel 3/4 output was a common output selection for most audiovisual devices intended to be connected to a TV using a Radio frequency (RF) signal. This channel option was provided because it was rare to have broadcast channels three and four used in the same market. The choice allowed the user to select the unused channel in their area so that the connected device would be able to provide video and audio on an RF feed to the television without excessive interference from a broadcast signal. ...more on Wikipedia about "Channel 3/4 output"
Color depth is a computer graphics term describing the number of bits used to represent the color of a single pixel in a bitmapped image or video frame buffer. This concept is also known as bits per pixel (bpp), particularly when specified along with the number of bits used. Higher color depth gives a broader range of distinct colors. ...more on Wikipedia about "Color depth"
Colortrak was a trademark used on several RCA color TVs throughout the 1970's to the 1990's. RCA televisions with the Colortrak branding were mid-range models; in comparison to the low-end XL-100 chassis or high-end " Dimensia" chassis in consumer sets (for professional "Dimensia"-chassis sets, or versions with BNC inputs, the designation was "LycenTV" for a short period in the early to mid 1980s). RCA discontinued use of the Colortrak brand, replacing with the "Entertainment Series" designation by 2001. Some models like this with the design quirks mentioned below have also been marketed under the GE name. ...more on Wikipedia about "Colortrak"
A Composite monitor is any analog video display that inputs an analog composite video signal. ...more on Wikipedia about "Composite monitor"
Composite video is the format of an analog television (picture only) signal before it is combined with a sound signal and modulated onto an RF carrier. It is usually in a standard format such as NTSC, PAL, or SECAM. It is a composite of three source signals called Y, U and V (together referred to as YUV) with sync pulses. Y represents the brightness or luminance of the picture and includes synchronizing pulses, so that by itself it could be displayed as a monochrome picture. U and V between them carry the colour information. They are first mixed with two orthogonal phases of a colour carrier signal to form a signal called the chrominance. Y and UV are then added together. Since Y is a baseband signal and UV has been mixed with a carrier, this addition is equivalent to frequency-division multiplexing. ...more on Wikipedia about "Composite video"
The contrast ratio is a metric of a video display, defined as the ratio of the light intensity of the brightest possible color to the darkest possible color a display is capable of displaying simultaneously. The higher the contrast ratio, the better the display is. ...more on Wikipedia about "Contrast ratio"
The Descriptive Video Service (DVS), created by WGBH-TV in Boston, is used by the Public Broadcasting Service (PBS) in the U.S. to provide video description for the visually impaired, so they can better understand what is happening on the video portion of the program. This greatly improves the experience and makes it much more valuable to blind and visually impaired viewers. ...more on Wikipedia about "Descriptive Video Service"
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The Digibox is a device marketed by British Sky Broadcasting in the UK to enable home users to receive digital satellite television broadcasts ( satellite receiver). An internet service is also available through the device, similar in some ways to the American MSN TV. The first Digiboxes shipped to consumers in mid- 1998, and the hardware reference design is unchanged since. The units are DVB-S compatible, and usually carry the DVB logo on the front. However, their use as a DVB-S receiver for anything other than Sky services is seriously limited by their reduced choice of symbol rates (22,000 and 27,500), and their inability to store more than about 20 non-EPG channels without losing them. ...more on Wikipedia about "Digibox (Sky Television)"
A digital video recorder (DVR) is a device that records video to a digital storage medium. The term DVR may be used to describe a piece of equipment such as a Personal Video Recorder (PVR) or a CCTV DVR. It may also be used to reference a function in a piece of equipment such as a digital video camera that has a DVR function built into it. ...more on Wikipedia about "Digital video recorder"
The Digital Visual Interface (DVI) is a video connector designed to maximize the visual quality of digital display devices such as flat panel LCD computer displays and digital projectors. It was developed by an industry consortium, the Digital Display Working Group (DDWG). ...more on Wikipedia about "Digital Visual Interface"
Direct broadcast satellite (DBS) is a term used to refer to satellite television broadcasts intended for home reception, also refered to as direct-to-home signals. It covers both analogue and digital television and radio reception, and is often extended to other services provided by modern digital television systems, including video-on-demand and interactive features. A "DBS service" usually refers to either a commercial service, or a group of free channels available from one orbital position targetting one country. ...more on Wikipedia about "Direct broadcast satellite"
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