Video Signal

video signal

[′vid·ē·ō ‚sig·nəl]
In television, the signal containing all of the visual information together with blanking and synchronizing pulses.

Video Signal


an electrical signal designed to produce an image. A video signal is formed by photoelectric converters (a superorthicon or vidicon in television or a photoelectric cell or photomultiplier in picture transmission) or by the detection of electromagnetic waves received by a radar set.

In television the instantaneous values of the video signal at the output of the television camera tube are proportional to the brightness of individual parts of the optical image on its light-sensitive surface. The possible peak-to-peak values of a video signal in black-and-white and color television are limited by the levels of the black, which is the reference level (when the video signal is zero), and the white (the maximum value of the video signal). For television braodcasting systems the lowest frequency of the television signal spectrum is equal to the frame frequency (50-60 Hz), and the highest is the greatest frequency of the change in brightness of the transmitted image along a line (6-6.5 MHz). In picture trans-mission a light spot passes sequentially over a fixed image. The rays reflected from the latter impinge on a photoelectric converter, thus creating video signals. The highest frequency in the video-signal spectrum is a function of the rate at which the image is scanned and varies over a wide range (80 Hz to 6 kHz). The video signal in radar is in the form of pulses. The lowest video-signal frequency of the spectrum is equal to the repetition rate of the radiated pulses (50-400 Hz) and the highest is practically inversely proportional to the duration of the radiated pulse (1-10 MHz).


echo signal

The radar energy returned to a radar by a target. The amount of this energy is called received power. Also called a video signal or a target signal.

target signal

The radar energy returned to a radar by a target. Also called an echo signal or a video signal. The amount of this energy is called received power. The size of the echo on the PPI (plan position indicator) is a direct function of the received power. See echo.
References in periodicals archive ?
Tallinn, Estonia, July 29, 2010 --( Smartec Company product line has supplemented with STC-3009 analog cameras supplied with removable IR cut filter and capable to produce clear video signal with 540 TV Lines res at up to 0,08/0,04 lux of min illumination.
TV video signal output (NTSC/PAL) is supported on the card's second channel and Sync-On-Green (SOG) can be enabled on both channels.
SES S.A., together with Fraunhofer Heinrich Hertz Institute HHI Berlin, will demonstrate a groundbreaking R&D project at IBC this year showcasing the transmission of a 10K x 2K panoramic video signal via satellite to multiple devices.
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The series is designed for use in numerous applications including noise reduction for various signal circuits, clock output signal line, in/out video signal line (for extremely high resolution) and high-speed signal line.
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The MachXO3 FPGA and the USB 3.0 sensor bridge reference design work together to convert the subLVDS video signal from the image sensor used in the module to a parallel format that can interface with the camera s USB 3.0 controller.
The VIA00001-series cables are a cost-effective solution to send a video signal from an existing source device to a projector or monitor, without the expense of upgrading to a new monitor.
Because bitrates for webcasts are more aggressive than for on-demand viewing, the best thing you can do for your video quality is to start with a clean video signal. Audio engineers always tell you that a strong signal-to-noise ratio is key to great audio and that microphone placement is more important than having a great microphone that is not near enough to the audio source.
Ramsey, NJ, October 02, 2016 --( PureLink, a leading manufacturer of advanced HD video solutions, announced today the availability of two new video signal management products that they have added to their HDTools line.