CS7666 datasheet(39/42 Pages) CIRRUS

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CS7666

DS302PP1

DEFINITIONS

Color Space

A color space is a mathematical representation of a set of colors. Three fundamental color

models are RGB (used in color computer graphics and color television), YIQ, YUV, or YCrCb

(used in broadcast and television systems), and CMYK (used in color printing).

RGB Color Space

The red, green, and blue (RGB) is widely used throughout computer graphics and imaging.

Red, green, and blue are three primary additive colors where the individual components are

added together to form the desired color.

YUV Color Space

The YUV color space is the basic color space used by the PAL (Phase Alternation Line), NTSC

(National Television System Committee), and SECAM (Sequential Couleur Avec Memoire or

Sequential Color with Memory) composite color video standards. The format conveys intensity

in the Y component and color information in the U and V components. In an 8-bit system,

where RGB range from code 0 to code 255, Y has a range of code 0 to code 255. The U

component ranges over code 0 ± 112 codes, and the V component ranges over code 0 ± 157.

YCrCb Color Space

The YCrCb color space was developed as part of Recommendation ITU-601 during the

development of a world-wide digital component video standard. YCrCb are scaled and offset

versions of YUV color space. Y is defined to have a nominal range of code 16 to code 235; Cr

and Cb are defined to have a range of code 16 to code 240, with code equal to the zero level.

MYCG Colors

Standard "color" CCD imagers employ integrated filter dots over the individual pixels.

Typically, four color filters are used, Magenta, Yellow, Cyan, and Green.

Chroma Block

A group of four adjacent CCD pixel with integrated MYCG filter dots. These four pixels are

generally formed with two pixels on one horizontal scan line, and two physically just below on

the next scan line. There can also be some slight horizontal shift of the pixels to smooth the

image. The chroma block is generally processed using a "color separator" into YUV, YCrCb, or

RGB color space before any image processing.

CS7666 数据表(PDF) 39 Page - Cirrus Logic