A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 13 / 812
– Jpeg baseline: picture size up to 4080x4080
– Alpha blending
– Thumb generation
– 4x2 scaling ratio from 1/16 to 64 arbitrary non-integer ratio
Display Engine
● Four moveable and size-adjustable layers, each layer size up to 8192x8192 pixels
● Ultra-Scaling engine
– 8-tap scale filter in horizontal and 4 tap in vertical
– Source image size from 8x4 to 8192x8192 resolution and destination image size from 8x4 to
8192x8192 resolution
● Support multiple image input formats
– mono 1/2/4/8 bpp
– palette 1/2/4/8 bpp
– 6/24/32 bpp color
– YUV444/420/422/411
● Support alpha blending/color key/gamma/harware cursor/sprite
● Output color correction: luminance/hue/saturation, etc
● Support de-interlace
● Video enhancement: lum peaking/DCTi/black and white level extension
● 3D input/output format conversion and display
Video Output
● HDMI 1.4 transmitter with HDCP
● LVDS/Sync RGB/CPU LCD interface up to 1920x1200 resolution
● Support 4-channel CVBS, or 2-channel S-video, or 1-channel YPbPr/VGA (YPbPr/VGA up to 1080p)
● Support two-channel independent display
Video Input
● Support TV decoder: 4-ch analog CVBS or 1-ch YPbPr(480i/576i/480p/576p) signal input
● Dual CMOS sensor parallel interfaces that support YUV format only
– CSI0 up to 1080p@30fps
– CSI1 up to 720p@30fps
● Support BT656 interface
● Support 24-bit YUV444/RGB interface
Analog Audio Output
● Stereo audio DAC
● Stereo capless headphone drivers
– Up to 100dB SNR during DAC playback
– Support 8KHz~192KHz DAC sample rate
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