Public Version
Camera ISP Functional Description
www.ti.com
–
The control-signal generator allows the generation of signals for strobe flash, mechanical shutter,
and global reset.
•
Three CSI receivers (one CCP2/MIPI CSI1 and two MIPI CSI2): The CSI receivers communicate with a
serial camera through the PHY's and transfers received data to memory or to the Video processing
hardware.
•
Bridge-lane shifter:
–
The data-lane shifter gives flexibility to the parallel camera connection and permits dynamic
reduction of pixel data.
–
The bridge allows higher transfer rates when data is captured from the parallel interface and sent to
memory.
•
Video-processing front end (VPFE): Comprises the CCDC. This module provides the camera ISP with
a powerful and flexible front end interface. It directly affects the input image data:
–
The CCDC provides an interface to image sensors and digital video sources and processes image
data.
•
Video-processing back end (VPBE): Comprises preview and resizer modules:
–
The preview module is a parameterized hardwired image-processing block whose
image-processing functions can be customized for each sensor type to realize good image quality
and video frame rates for digital still camera preview displays and video-recording modes.
–
The resizer module provides a means of sizing the input image data to the desired display or
video-encoding resolution. Zoom is limited to 4x in both vertical and horizontal directions for each
pass. After one (on-the-fly) upscaling pass, the image can be sent to memory and then resent
through the resizer.
•
Statistics-collection modules (SCM): H3A and histogram modules that provide statistics on the
incoming images to help designers of camera systems:
–
The hardware 3A module supports the control loops for AF, AWB, and AE by collecting metrics
about RAW image data from the CCDC.
–
The histogram module bins input color pixels, depending on the amplitude, and provide statistics
required to implement various 3A (AE/AF/AWB) algorithms and tune the final image/video output.
The histogram module can operate on RAW image data from CCDC or memory.
•
Central-resource shared buffer logic (CRSBL): Buffers and schedules memory accesses requested by
the camera modules
•
Circular buffer: Avoids storage of full image frames in the memory when the data must be post and/or
preprocessed by software.
•
MMU: Performs virtual-to-physical address translation between its interconnect slave and interconnect
master access ports
6.4.1.1
Camera ISP Possible Data Paths Inside the module
Data paths inside the camera ISP hardware depend on the image format sourced by the sensor (RAW
RGB, YUV4:2:2, JPEG,...).
lists the modules used for the different data types. The formats described in the columns are
the formats at the inputs of the CCDC. It is the internal parallel format.
Table 6-21. Camera ISP Allowed Data Flows for Hardware
Module
8/10 bit RAW
11/12 bit
BT 656 8/10
YUV 8/10 bit
from sensor
RAW from
bit
sensor
CCDC Bridge lane shifter
X
CCDC BT 656 decoder
x
CCDC DC substract
x
x
x
x
CCDC Optical Black clamp
x
x
CCDC Faulty pixel correction
x
x
CCDC Data formatter
x
CCDC Preview, H3A, Histogram data paths
x
1156Camera Image Signal Processor
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
Страница 174: ...174 List of Tables SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
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 ...
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 ...