chrominance - определение. Что такое chrominance
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Что (кто) такое chrominance - определение

COLOUR IN AN IMAGE OR VIDEO; PART OF INFORMATION OR SIGNAL DESCRIBING THE COLOUR (HUE AND SATURATION) BUT NOT BRIGHTNESS (SHADE OF GREY)
Chroma (video); Chromonance; Chromanince; Chromanence; Chromanance; Chroma signal
  • Luminance only, Chrominance only, and full color image.

chrominance         
['kr??m?n?ns]
¦ noun the colorimetric difference between a given colour in a television picture and a standard colour of equal luminance.
Origin
1950s: from Gk khroma 'colour', on the pattern of luminance.
Chrominance         
Chrominance (chroma or C for short) is the signal used in video systems to convey the color information of the picture (see YUV color model), separately from the accompanying luma signal (or Y' for short). Chrominance is usually represented as two color-difference components: U = B′ − Y′ (blue − luma) and V = R′ − Y′ (red − luma).
Chrominance subcarrier         
The chrominance subcarrier is a separate subcarrier signal that carries the color information during transmission of a composite video signal. It is modulated and synchronized using the colorburst signal and then attached to the back porch of the signal.

Википедия

Chrominance

Chrominance (chroma or C for short) is the signal used in video systems to convey the color information of the picture (see YUV color model), separately from the accompanying luma signal (or Y' for short). Chrominance is usually represented as two color-difference components: U = B′ − Y′ (blue − luma) and V = R′ − Y′ (red − luma). Each of these difference components may have scale factors and offsets applied to it, as specified by the applicable video standard.

In composite video signals, the U and V signals modulate a color subcarrier signal, and the result is referred to as the chrominance signal; the phase and amplitude of this modulated chrominance signal correspond approximately to the hue and saturation of the color. In digital-video and still-image color spaces such as Y′CbCr, the luma and chrominance components are digital sample values.

Separating RGB color signals into luma and chrominance allows the bandwidth of each to be determined separately. Typically, the chrominance bandwidth is reduced in analog composite video by reducing the bandwidth of a modulated color subcarrier, and in digital systems by chroma subsampling.