TALLY CONTROL
TBC (Time Base Corrector)
TCP/IP
TDM (Time Division Multiplex)
TELE-PROMPTER
TELECINE
TELETEXT
TEN BIT (10 Bit)
TERMINATION SWITCH
TFT SCREEN
TGA/TARGA
TIFF
TIME CODE
TITLING
Toslink
TP
TRACKING
TRANSCODING
TRANSPONDER
TRI-LEVEL SYNC
TRUE COLOR
TTL (Transistor-Transistor Logic)
TTL MONITOR
TVRO
TWO-T (2T) PULSE
TALLY CONTROL
A signal lamp on professional video and TV cameras to inform performers and crewmembers which particular camera is on the air. In large studios the lamp arrangement is duplicated on mixing tables for the convenience of the director.
0

TBC (Time Base Corrector)
A device used to rectify the results of distorted sync pulses which are due to mechanical faults (tape transport, tape stretch, etc.). TBCs are also used to synchronize two video sources to allow mixing. In the past, CCD technology was used to move or alter a video signal in an analog memory chip which was suitable for simple analog synchronization. However, CCDs had very limited memory capabilities. Therefore, digital TBCs are now common. They usually break down the video signal into its components. This is extremely flexible as it permits storage of a full frame or more in a digital memory device (RAM type chips). They operate in full bandwidth with 8 or more bit conversion schemes and are suitable for professional applications. In the digital domain a similar process is used, named reclocking, which restores stability of a digital signal by restoring the original clock signals and fixing the jittering signal with a stable time base.
0

TCP/IP
Transmission Control Protocol/Internet Protocol. A communication protocol commonly used for Ethernet and Internet communication. The system relies on data sent in packets of certain sizes, suitable for the medium used.
0

TDM (Time Division Multiplex)
A system intended to combine several signals on one channel by alternately sending packets of each signal in predefined segments of time.
0

TELE-PROMPTER
A device used in news casting for displaying large text on a partially transparent screen where the reader can look at the camera and read the text from the screen placed in front of the camera. In old systems, one person read the news, while the other rolled a transparent, long message banner in front of the camera. In modern Tele-prompter devices, the user does it with a mirrored computer screen that, in most cases, he controls himself.
0

TELECINE
Telecine is a device that converts film movies to video. The main problem in film-to-video conversion is the frame rate. In film movies it is 18 or 24 frames per second, which does not match the video frame rate of PAL or NTSC. For good conversion, interpolation and other techniques are used in the telecine device. In advanced telecine machines, film movie is sampled digitally and converted to video, frame after frame, in real-time. One of the most popular digital systems used in professional telecine machines is called flying-spot, which allows almost transparent conversion to video. The digital process is called pull down.
0

TELETEXT
A service provided by some TV broadcasting stations, which transmits latent data information alongside the video signal. In order to retrieve the teletext information and display it on the screen, the TV receiver is equipped with a teletext decoder. The data information is usually encoded and inserted in the vertical-blanking interval. Corrupted teletext information often causes image instability and picture roll because it effects the video syncs.
0

TEN BIT (10 Bit)
An expression used to describe a digital data stream of 10-bit width. A ten-bit digital word can have 1024 steps or values. Digitizing video at 10-bit resolution is acceptable for most broadcast specifications, as the 1024 recovered steps accurately represent the digitized signal. When an 8-bit stream of data is used, only 256 steps are recoverable.
0

TERMINATION SWITCH
A load device, usually a 75-ohm resistor, connected by a switch to a video transmission line to terminate the line. For a video signal be correctly transmitted without losses, proper impedance is essential at the end of the line. In many video-processing devices, a termination switch is therefore included as a standard feature. When the termination switch is in the Hi-Z position, the video signal is not terminated but looped to the next station. The signal can thus be transmitted in parallel through a number of devices. The termination switch terminates the final device.
0

TFT SCREEN
TFT stands for Thin-Film-Transistor. This technology is mainly used for manufacturing flat computer and video screens, which are superior to classic LCD screens. Color quality, fast response and resolutions are excellent for video and graphics, and therefore TFT screens are replacing tube-based Wide Screen projectors as well. In the beginning there were some price and technical problems with TFT screens. The price was high, mainly due to low yield in the wafer production process, the brightness of the screen was quite low and the resolution, although fine for composite video, was not sufficient for high-resolution computer graphics. As technology advanced, most of the problems were solved and now, bright, high-resolution TFT screens are available at very reasonable prices.
0

TGA/TARGA
A graphics file format initially developed for use with Truevision Targa/Vista graphics boards. This file format, with its variations, supports up to 32 bit formats. The images in the file can be either uncompressed or compressed with RLE (Run Length Encoding) compression format, and the file structure is very simple, reliable and suitable for file transfer and exchange between various computers.
0

TIFF
A widely used graphics file format for PC and Macintosh computers. This file format supports from monochrome up to 24-bit color and supports RGB through CMYK formats. Despite its popularity, the format is quite complex, and Tiff files created by one computer may be unreadable by another.
0

TIME CODE
A digital code or number ins erted in to a videotape or stream, unseen on the screen, for editing purposes. The time code identifies every frame of the videotape/stream and displays hours, minutes, seconds and frames. For editing purposes it is a must, as each video frame can be addressed individually. There are several methods of inserting and reading time codes such as VITC, LTC and others.
0

TITLING
The superimposition of text on video footage. Titles are added to a video scene during or after the production. Sophisticated titling devices allow the user to prepare text and graphics in various sizes, fonts and colors which are later inserted, one-by-one, at the appropriate times and places. An entire feature film can be titled in this fashion. Many video cameras either include built-in titlers or permit externally-produced titles to be mixed with the image produced by the camera while shooting.
0

Toslink
0

TP
Twisted Pair. A system for transferring high frequency signals on a twisted pair of wires instead of a coax cable. The TP system is used in video, audio, graphics and in the computer world as one of the network interconnecting standards. The twisted pair system is essentially a balanced system, where antiphase signals are transmitted on the two wires. Some sophisticated TP systems allow the transfer of several signals simultaneously on the wires, such as video and two audio channels.
0

TRACKING
(рус. Трекинг)
A method of controlling the mechanical position of the video head over the recorded material on video tape. Due to small differences in alignment of head-to-tape position in different VCRs, it is sometimes necessary to re-adjust the tracking control on one VCR when playing a tape that was recorded on another. Nowadays, most VCRs have an automatic, digital tracking system and no user intervention is required.
0

TRANSCODING
A term used to describe Standards Conversion between PAL, NTSC and SECAM.
0

TRANSPONDER
A combination of a transmitter and a receiver on a satellite. Geostationary satellites that are used for TV program transmissions worldwide have several transponders, each operating independently. The transponder allows bi-directional communication with earth stations. DTV uses satellite transponders.
0

TRI-LEVEL SYNC
A special sync signal used in HDTV which improves immunity to noise and interference.
0

TRUE COLOR
A graphics format of various resolution schemes which displays 24 bit (16.7 million colors) or even 32 bit color information. This format, perfectly suitable for video, displays “true color” on computer and video screens (after appropriate conversion). In order to display “true color”, the graphics card of the computer must have enough RAM installed (at least 1-2 Mbytes - depending on the required resolution).
0

TTL (Transistor-Transistor Logic)
A term used in digital electronics describing the ability of a device or circuit to be connected directly to the input or output of digital equipment. Such compatibility eliminates the need for interfacing circuitry. TTL signals are usually limited to two states, low and high, and are thus more immune to interference than analog signals.
0

TTL MONITOR
A term used for a monitor which accepts TTL level signals (such as those generated by a computer). TTL monitors differ from analog monitors, which accept composite or component video signals bearing color, black and white, and sync information as well as analog graphic signals such as VGA through UXGA. TTL monitors offered high resolution on the screen but were very limited in the number of colors available at any one time. (See CGA, and EGA). Nowadays, digital monitors with DVI inputs are taking over, providing the best of both worlds – high resolution and color rich images.
0

TVRO
Television Receive Only. A term describing a local or home antenna system.
0

TWO-T (2T) PULSE
A sine-squared test pulse for video equipment measurement, with its frequency characteristics covering the bandwidth of the signal. The distortion of this pulse created by the video amplifier or processor is measured in \''K\'' units or factor, and should be as close to zero as possible. This test signal easily detects the non-linearity of video devices which results in spurious effects, signal overshoots, ringing etc, due to group delay effects.
0

Логин:
Пароль:
Контакты | ISO | Гарантия | Обработка персональных данных
Copyright © Kramer Electronics LTD. 1981—2017.
Yandex.Metrica