TABLE OF CONTENTS Various scale factors are applied to the basic color difference components B ?-Y ? and R?-Y? for different applications. In the previous chapter, I introduced luma and color difference coding; in this chapter, I will detail the following coding systems:
B?-Y?, R?-Y? components form the numerical basis for all the other component sets; otherwise, they are not directly used.
PBPR components are used for component analog video (including DVD player analog interfaces).
C BC R components as defined in Rec. 601 are used for component digital video, including studio video, M-JPEG, and MPEG.
"Full range" C BC R components are used in JPEG/JFIF.
UV components are used for NTSC or PAL, as I will describe on page 336.
IQ components were historically used for NTSC, as I will describe on page 367.
| Note | Video uses the symbols U and V to represent certain color difference components. The CIE defines the pairs [ u, v], [ u?, v?], and [ u*, v*]. All of these pairs represent chromatic or chroma information, but they are all numerically and functionally different. Video [ U, V] components are neither directly based upon, nor superseded by, any of the CIE color spaces. |
Y?UV and Y ?IQ are intermediate quantities toward the formation of composite NTSC, PAL, and S-video. Neither Y?UV nor Y ?IQ has a standard component interface, and neither...
