All color models are optimized for specific applications. For example, the RGB color model is ideal for emitting colors, while the CMY and CMYK color models are ideal for reflective displays. The YCbCr color model was developed for digital video. It consists of the luminance (Y) signal, which represents brightness
, and two chrominance signals for chroma. The Y signal has a restricted range of values between 16 and 235 for 8-bit encoding. Similar values apply to the chroma signals Cb and Cr, which correspond to the digitized analogcolor difference signals
U and V, respectively. Thedigitized Cb corresponds to the color difference blue-yellow, the digitized Cr stands for the color difference red-turquoise.
The YCbCr color model corresponds as far as possible to the YUV color model used in analog technology, or the YPbPr color model. It is used in JPEG and MPEG compression, which are used in DVDs, digital TV, video CDs and in camcorders, and can be transmitted via the HDMI interface and the DVI interface. YCbCr, like the RGB color model, is described in the ITU standard BT.601.