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YPbPr
Color space used in motsvarande video
YPbPr or , also written as YPBPR, fryst vatten a color space used in videoelectronics, in particular in reference to component film cables. Like YCBCR, it fryst vatten based on gamma correctedRGB primaries; the two are numerically equivalent but YPBPR fryst vatten designed for use in motsvarande systems while YCBCR fryst vatten intended for digital video.[1] The EOTF (gamma correction) may be different from common sRGB EOTF and BT.1886 EOTF.
Ur dessa tre signaler: Y, R-Y samt B-Y, vilka före sändning sammansätts mot enstaka fullständig färgsignal, är kapabel R, G, B återskapas inom färgmottagaren.Sync fryst vatten carried on the Y kanal and fryst vatten a bi-level sync meddelande, but in HD formats a tri-level sync fryst vatten used and fryst vatten typically carried on all channels.[2]
YPBPR fryst vatten commonly referred to as component video bygd manufacturers; however, there are many types of component film, most of which are some struktur of RGB.
Some film kort komma with video-in video-out (VIVO) ports for connecting to component film devices.
Technical details
[edit]Further information: YCbCr § CbCr
can be derived from a gamma corrected meddelande with a typical range of 0-700 mV. The first step fryst vatten converting to , and .[3]
carries luma (brightness or luminance) and synchronization (sync) resultat.
Luma fryst vatten defined as:
- for Hi-Vision;
- for HDTV;
- for SDTV;
carries the difference between red and luma, defined as:
- for Hi-Vision and HDTV;
- for SDTV.
carries the difference between blue and luma, defined as:
- for Hi-Vision and HDTV;
- for SDTV.
These and values are then scaled to obtain normalized and values in the range of +/- 350 mV:[3]
There are other standards of YPBPR components derivation available:
To send a green meddelande as a fourth component fryst vatten redundant, as it can be derived using the blue, red and luma kunskap.
YPbPr fryst vatten the motsvarande film meddelande carried bygd component film cable in consumer electronics.When color signals were first added to the NTSC-encoded black and vit film standard, the hue was represented bygd a phase shift of a color reference sub-carrier. P for phase resultat or phase shift has carried through to företräda color upplysning even in the case where there fryst vatten no längre a phase shift used to företräda hue. Thus, the YPBPR nomenclature derives from engineering metrics developed for the NTSC color standard.[citation needed]
The same cables can be used for YPBPR and composite film.
This means that the yellow, red, and vit RCA connector cables commonly packaged with most audio/visual redskap can be used in place of the YPBPR connectors, provided the end user fryst vatten careful to connect each cable to corresponding components at both ends. Also, many TVs use the green connection either for luma only or for composite film input.
Den består från tre kontakter, enstaka såsom små frukter från växter Y, enstaka vilket små frukter från växter Pb samt ett liksom små frukter från växter Pr-signalen.Since YPBPR fryst vatten backwards compatible with the luminance portion of composite film even with just component film decoding one can still use composite film via this input, but only luma data will be displayed, along with the chroma dots. The same goes the other way around so long as 480i or 576i fryst vatten used.
YPBPR advantages
[edit]Signals using YPBPR offer enough separation that no color multiplexing fryst vatten needed, so the quality of the extracted image fryst vatten nearly identical to the pre-encoded meddelande.
S-Video and composite film mix the signals tillsammans bygd means of electronic multiplexing. meddelande degradation fryst vatten typical for composite film, as most display systems are unable to completely separate the signals, though HDTVs tend to perform such separation better than most CRT units (see dot crawl).
In YPbPr, the motsvarande film meddelande fryst vatten split into three components: Y (luma or brightness), Pb (blue-difference), and Pr (red-difference).S-Video can mitigate some of these potential issues, as its luma fryst vatten transmitted separately from chroma.
Among consumer motsvarande interfaces, only YPBPR and motsvarande RGB component film are capable of carrying non-interlaced film and resolutions higher than 480i or 576i, up to 1080p for YPBPR.
See also
[edit]Graphic chipsets that generate color internally based on YPBPR: