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dss-E067
Public Version
www.ti.com
Display Subsystem Use Cases and Tips
7.6
Display Subsystem Use Cases and Tips
This section gives some generic use cases and tips for setting the modules of the display subsystem.
7.6.1 How to Configure the Scaling Unit in the DISPC Module
This section describes the scaling capability of the display controller (DISPC). The scaling unit is a part of
the video pipeline is used when transferring pixels from the system memory (SDRAM or on-chip SRAM) to
the LCD panel or the TV set. The scaling unit consists of two scaling blocks: The vertical scaling block
followed by the horizontal scaling block. The input pixel format is RGB24. In case the pixel format in
system memory is not RGB, the color space conversion unit in front of the scaling unit converts the YUV
pixels into RGB pixels. The two scaling units are independent: Neither of them, only one, or both can be
used simultaneously
7.6.1.1
Filtering
The scaling is used to down-scale, up-scale, or process the image while keeping the same size. It is
applied independently horizontally and vertically. The same filtering applies for each color component (R,
G, or B).
7.6.1.1.1 Vertical Filtering
The vertical filtering unit is based on a poly-phase rotation architecture with eight phases and three taps.
That means that 24 coefficients are programmable
The vertical 3-tap filtering macro architecture is shown in
Figure 7-147. Vertical Filtering Macro Architecture (Three Taps)
For the 3-tap vertical up/downsampling the equation is (with the example of R component):
(14)
1777
SWPU177N – December 2009 – Revised November 2010
Display Subsystem
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
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Страница 692: ...692 MPU Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
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 ...
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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 ...