WT8893S数据手册Weltrend中文资料规格书

描述 Description

The WT8893S is a highly-integrated video processor SoC dedicated for ADAS/AVM applications. The chip includes CVBS input from 4 channel video decoders, 4 individual contrast/brightness adjustment function, input scaling up/down for accurate fish-eye correction, input image position adjustment function to correct the camera assembling error, video image processing, fisheye correction, perspective adjustment, combine front/rear/left/right four images to top view with adjustable image size and boundary fusion processing providing seamless AVM image, AWB technology to provide a uniform image, output video contrast/brightness/sharpness adjustment and scaling adjustment, OSD, video encoder, output interface with one analog NTSC/PAL CVBS or digital CCIR 656/601 output or DVR 720P raw data (30/60Hz), serial flash memory (max. 2ea) for JPG and MCU code, external 1GB (64M*16) DDR for video buffer (max. 2GB), and SPI/I2C interfaces.
This chip has been qualified for the Automotive Electronics Council standard Q100 (AEC-Q100) Grade 2. While most AVM chips in the market are DSP-based solution, the WT8893S is hardwired ASIC which provides cost-effective solution with low-power consumption compared to its counterparts.

特性 Features

●32-bit MCU embedded
●Video digital input interface:
●CVBS input from 4 channel video decoders through CCIR 656, YUV 4:2:2 image formatResolution: NTSC 720 x 480i; PAL 720 x 576i
 - 4-channel multiplexed inputs at 108 MHz with 9-bit inputs
●Input video color process
 - 4 individual vignetting compensation
●Input scaling up/down for accurate fish-eye correction
●Input image position adjust to correct error of assembling camera
 - 4 individual picture X-Y axis position and size adjustment
 - 4 individual mirror function
●Fish-eye correction Process
 - Display video and video image process
 (a) Front video: original, horizontal 180° (XV(-45)), horizontal 130° (FE(130))
 (b) Rear video: original, horizontal 180° (XV(-45)), horizontal 130° (FE(130))
 (c) Right video: original, horizontal 65° (YV(50~80) + FE(90) + ZV(45))
 (d) Left video: original, horizontal 65° (YV(50~80) + FE(90) + ZV(45))
 (e) AVM video: front + rear + right + left video image process
 (f) Adjustable resolution 1°
 (g) 4 video input sources can be selected to any 4 video processes.
 - Fish eye angle correction
 (a) adjustable range 130° ~ 190°, adjustable resolution 1°
 
150° (115° horizontal - 85° vertical -150° diagonal) (±5°)
 (2) 170° (130° horizontal - 96° vertical -170° diagonal) (±5°)
 (3) 180° (180° horizontal - 112° vertical - 180° diagonal) (±5°)
 (b) 4 individual lens distortion calibration: 4 stage radial ± adjustment
 - New video process algorithm improve image saw-tooth
 - Perspective adjustment
 - Combine 4 images to top view
 (a) adjust the image size of front/rear/left/right
 (b) content shift up/down/right/left and few angle rotation
 (c) the AVM image spilt screen can be adjusted
 - Video window width / height / location adjustment
 - Scaling up/down processOutput video zoom in/out and position adjustment
●Provide seamless AVM image by fusion boundary
●Increasing 4 images uniformity by ABU (Auto Brightness Unification)
●Increasing 4 images uniformity by ACU (Auto Color Unification)
●Frame Rate Conversion
 - From 50/60 Hz input to 50/60 Hz output
 - Group Delay Under 100 ms
●Output video color process
 - Contrast adjustment
 - Brightness adjustment
 - Sharpness adjustment
●OSD
 - Support multi overlap layers display including background ICON Video, Static parking guidance lines, distance display, Visualization UPA.
 - Background/ICON
 - Support JPG file format
 - JPG file for ICON and background
 - Support JPG file alpha-blending and dynamic image fade in/fade out effect
 - Support JPG file transparent
 - Support JPG copy / move function
 - 6 layer overlap including JPEG, UPA, ...etc.
 - Character using for distance display
 (a) Character size16*18 pixel
 (b) Support 64 colors
 (c) Support alpha-blending and transparent
 (d) Support 2X, 3X, 4X magnify
 (e) Support blinking (programmable period and duty cycle)
 (f) Position could be adjusted
 - Static parking guidance lines
 (a) 8 colors (user programmable) for static car motion line function
 (b) Support alpha-blending
 (c) Line width size can be adjusted
 (d) Position can be adjusted
 (e) Support fish-eye (non-straight) mode
 - Visualization UPA
 (a) Support 4 rectangle display
 (b) Support 8 color (user programmable) for display
 (c) Support alpha-blending for display
 (d) Position and size could be adjusted
 - Overlap layer priority
 (a) Video < JPG (background) < Static distance guide lines < Character < Visualization UPA
 (b) Adjust individual alpha-blending register
●Output process
 - Support output scaling adjustment
●Video encoder
 - Standard Video output CVBS: NTSC/PAL
●Output interface
 - 1 analog NTSC/PAL CVBS
 - 1 digital CCIR 656 or 601 output
 - DVR Raw Data 720P (30/60 Hz)
●Memory Interface
 - Serial flash memory (max. 2ea) for JPG and MCU code
 - Support 1GB 64M*16 (Max. 2Gb) DDR2 SDRAM memory for video buffer
●Slave mode controller Interface
 - High speed SPI/I2C interface
●Electrical Characteristics
 - Operating Temperature: -40 ºC ~ +105 ºC
 - Storage Temperature: -50 ºC ~ +125 ºC
●AEC-Q100This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 2)