Ydbdr

Information about Ydbdr

An image along with its Y, Db, and Dr components.

YDbDr is the colour space used in the SÃ‰CAM colour television broadcasting standard, which is used in France and some countries of the former Eastern Bloc. It is very close to YUV and its related colour spaces such as YIQ, YPbPr and YCbCr.

YDbDr is composed of three components - Y, Db and Dr. Y is the luminance, and Db and Dr are the chrominance components (representing the red and blue colour differences).

Formulas

The Y, Db and Dr signals are created from an original RGB (red, green and blue) source. The weighted values of R, G and B are added together to produce a single Y signal, representing the overall brightness, or luminance, of that spot. The Db signal is then created by subtracting the Y from the blue signal of the original RGB, and then scaling; and V by subtracting the Y from the red, and then scaling by a different factor.

These formulae approximate the conversion between the RGB colour space and YDbDr.

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From RGB to YDbDr:

$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$
$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$
$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$

From YDbDr to RGB:

$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$
$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$
$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$

Or, using a matrix representation:

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You may note that the Y component of YDbDr is the same as the Y component of YUV. Db and Dr are related to the U and V components of the YUV colour space as follows:

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$\text{[math]}$	$\text{[math]}$

There is also a variety of the PAL broadcasting standard, PAL-N, that uses the YDbDr colour space.

References

Shi, Yun Q. and Sun, Huifang Image and Video Compression for Multimedia Engineering, CRC Press, 2000 ISBN 0-8493-3491-8

Television (often abbreviated to TV, T.V., or more recently, tv; sometimes called telly, the tube, boob tube, or idiot box in British English) is a widely used telecommunication system for broadcasting and receiving moving pictures
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Motto
LibertÃ©, Ã‰galitÃ©, FraternitÃ©
"Liberty, Equality, Fraternity"
Anthem
"La Marseillaise"

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Eastern Bloc (or Soviet Bloc) was used to refer to the Soviet Union and its allies in Central and Eastern Europe (Bulgaria, Czechoslovakia, East Germany, Hungary, Poland, Romania, and—until the early 1960s—Albania).
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YUV model defines a color space in terms of one luma and two chrominance components. The YUV color model is used in the PAL, NTSC, and SECAM composite color video standards.
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YIQ is the color space used by the NTSC color TV system, employed mainly in North and Central America, and Japan. In the U.S., currently federally mandated for analog over-the-air TV broadcasting as shown in this excerpt of the current FCC rules and regulations part 73 "TV
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YPbPr (also referred to as "Y/Pb/Pr", "YPrPb", "PrPbY", "B-Y R-Y Y" and "PbPrY") is a color space used in video electronics, in particular in reference to component video cables.
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YCbCr or Y'CbCr is a family of color spaces used in video and digital photography systems. Y' is the luma component and Cb and Cr are the blue and red chroma components. The prime on the Y is to distinguish the luma from luminance.
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As applied to video signals, luma represents the brightness in an image (the "black and white" or achromatic portion of the image). Luma is typically paired with chroma. Luma represents the achromatic image without any color, while the chroma components represent the color
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Chrominance (chroma for short), is the signal used in many video systems to carry the color information of the picture separately from the accompanying luma signal.
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RGB color model is an additive model in which red, green, and blue (often used in additive light models) are combined in various ways to reproduce other colors. The name of the model and the abbreviation ‘RGB’ come from the three primary colors, red, green, and blue and
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PAL, short for Phase Alternating Line, is a colour encoding system used in broadcast television systems in large parts of the world. Other common analogue television systems are SECAM and NTSC.
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A color model is an abstract mathematical model describing the way colors can be represented as tuples of numbers, typically as three or four values or color components. When this model is associated with a precise description of how the components are to be interpreted (viewing
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An RGB color space is any additive color space based on the RGB color model. RGB is shorthand for Red, Green, Blue.

RGB is a convenient color model for computer graphics because the human visual system works in a way that is similar—though
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CMYK (short for cyan, magenta, yellow, and key (black), and often referred to as process color or four color) is a subtractive color model, used in color printing, also used to describe the printing process itself.
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HSL and HSV (also called HSB) are two related representations of points in an RGB color space, which attempt to describe perceptual color relationships more accurately than RGB, while remaining computationally simple.
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RYB (an abbreviation of red-yellow-blue) is a historical set of subtractive primary colors. It is primarily used in art and art education, particularly painting. It predates modern scientific color theory.
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SECAM, also written SÃ‰CAM (SÃ©quentiel couleur Ã mÃ©moire, French for "Sequential Color with Memory"), is an analog color television system first used in France.
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Ydbdr

Information about Ydbdr

Formulas

References

See also