dss-E063
R
G
B
=
RY
GY
BY
RCr
GCr
BCr
RCb
GCb
BCb
*
Y
Cr
128
–
Cb
128
–
1
256
*
dss-E064
Public Version
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Display Subsystem Functional Description
In case of 5-tap configuration for the vertical filtering, the missing chrominance samples are always
duplicated using the second chrominance samples in the same 32-bit value.
Then the pixels are converted from YCbCr color space into the RGB color space, because the output
format of the color space conversion is RGB24 (8-bit value per component: Red, green, and blue). The
following matrices show the 11-bit coefficients registers used to convert from YCbCr 4:4:4 into RGB24.
Users set the coefficients according to the standard used to encode the pixel data in YCbCr color space.
In case of resampling, the YUV4:2:2 format is converted into YUV4:4:4. The YUV4:2:2-to-YUV4:4:4
processing is bypassed in the color space conversion unit.
If the active range for the luminance samples (Y) is [16:235] and [16:240] for the chrominance samples
(Cb and Cr), the values of R, G, and B output components are clipped to the range [0:255]. The equation
shown in
gives the 11-bit coefficients of the YCbCr to RGB color space conversion.
Figure 7-73. YCbCr to RGB Registers (VIDFULLRANGE = 0)
If the active range for the luminance samples (Y) and chrominance samples (Cb and Cr) is [0:255], the
values of R, G, and B output components are clipped to the range [0:255]. The equation shown in
gives the 11-bit coefficients of the YCbCr-to-RGB color space conversion.
Figure 7-74. YCbCr to RGB Registers (VIDFULLRANGE = 1)
describes the computation for the calculation of the R component. The same computation
applies for the G and B components:
1643
SWPU177N – December 2009 – Revised November 2010
Display Subsystem
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
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Страница 1084: ...1084 IVA2 2 Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1990: ...1990 2D 3D Graphics Accelerator SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2334: ...2334 Memory Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2700: ...2700 Memory Management Units SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2868: ...2868 HDQ 1 Wire SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2974: ...2974 UART IrDA CIR SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3054: ...3054 Multichannel SPI SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3462: ...3462 MMC SD SDIO Card Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3508: ...3508 General Purpose Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3584: ...3584 Initialization SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3648: ...3648 Debug and Emulation SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...