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- Number of terms: 20560
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Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
Monochrome or luminance information. Monochrome means one color. In the color television system, the black and white portion of the picture has to be one “color” gray, D6500, 6500° K as defined by x and y values in the 1939 CIE color coordinate system. The black and white signal in the S or Component video path is separate from the color information.
Industry:Entertainment
Signals used by color television systems to convey color information (not luminance) in such a way that the signals go to zero when there is no color in the picture. Color difference signal formats include: R-Y and B-Y; I and Q; U and V; PR and PB. The figure below shows general color difference waveforms along with the Y signal. The color difference signals must first be converted in their RGB form before they can recreate the picture. Refer to the RGB discussion to view what the RGB version of the color bar signal looks like. The color difference signals in the figure are centered around 0 volts, but this is only true for the SMPTE/EBU N10 standard. The NTSC and M11 color difference standards have the most negative portions of the color difference signals riding on a voltage of 0 volts or close to it.
Industry:Entertainment
A term used to describe a piece of equipment dedicated to one specific function, usually involving a form of digital video magic.
Industry:Entertainment
Spurious colors appearing along the edges of color pictures, but that do not have a color relationship to the picture.
Industry:Entertainment
Performs the reverse function of the chroma demodulator in that it combines the two color difference signals into the single chroma signal.
Industry:Entertainment
a) The reduction in gain applied to a picture signal at those levels corresponding to dark areas in a picture with respect to the gain at that level corresponding to the midrange light value in the picture.
b) Amplitude compression of the signals corresponding to the black regions of the picture, thus modifying the tonal gradient.
Industry:Entertainment
a) In NTSC color television, it takes four fields to complete a color frame. In PAL, it takes eight fields. b) Polarity of the video frame.
Color frame must alternate polarity with each frame to keep the video signal in phase.
Industry:Entertainment
a) This voltage defines the picture’s black level. Video that dips below this level such as sync pulses are called blacker than black.
b) Strictly interpreted, denotes the light level at which a video signal representing picture black is reproduced on your TV screen. In terms of light output from a TV set, black areas of the picture should be represented by an absence of light. Something that is black or below black in the video signal shouldn’t produce any light from the display. c) Some TV sets actually use Black Level as a control name. It is a far better description of the function than the most commonly found name for it, Brightness.
Industry:Entertainment
