AVERLOGIC AL250

AL250
Video Scan Doubler
Applications
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TV Ready Multimedia Computer Monitor
TV to PC Video Scan Converter Box
Progressive Scan TV
Video Game Station
DVD Player
Portable VCD Player
LCD Monitor w/VGA Input
Video Based Set-top Box
LCD Projector
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Description
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The AL250 Video Scan Doubler (DeInterlacer) is a video conversion chip for
consumer
video
and
multimedia
applications. It converts interlaced NTSC
or PAL, ITU-R BT 601 (CCIR601) or
square pixel, YUV422 or RGB565 digital
signals into computer monitor RGB
signals for direct connection to a
computer monitor or progressive scan TV.
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On-screen
Display
Video Memory
Digital
YUV or RGB
input
16
Video
Formatter
Convert interlaced YUV/RGB (NTSC/PAL) into
non-interlaced RGB format for CRT or LCD
monitors
Highly integrated design with built-in DAC, SRAM,
OSD and LUT
Built-in on-screen-display with programmable bitmap
Advanced digital line interpolation with no tearing or
jagged edge artifacts
Reduced interlace flicker
Auto NTSC/PAL detect
Digital video input of square pixel, ITU-R BT 601
(CCIR 601), or user-defined format
I2C programming interface
Internal RGB video lookup table (LUT) to provide
gamma correction
Overlay support for title making and complex onscreen display
Self-initialization without software (Plug & Play)
3.3 or 5 volt support
RGB
Video
Lookup
Tables
Video Processor
and Scan Doubler
8-bit DAC
R
8-bit DAC
G
8-bit DAC
B
VCLK
RSET
I2C Circuit
VREF
Mode Control
COMP
SQUARE
SDA
I2CADDR
SCL
GVS
GHREF
GHS
AVERLOGIC TECHNOLOGIES, INC. E-mail: sales_usa@averlogic.com
AVERLOGIC TECHNOLOGIES, CORP. E-mail: sales@averlogic.com.tw
STD
2
HREF
INTYPE
VIDVS
Timing
Control
RESET
VIDHS
OVLCTRL
VCLKX2
AL250-01
URL: www.averlogic.com
URL: www.averlogic.com.tw
February 25, 2003
Satellite Receiver/Tuner
AL242
TV
Decoder
Video
AL250
TV-to-VGA
Converter
Chip
VGA Monitor
LCD
Panel
VCR
(Internal; YUV422)
Digital TV
Laser Disc/DVD
(Internal; YUV422)
Video Games
AL250 Typical Applications
AL250-02
By using I2C interface control, the AL250 can
also be programmed to co-ordinate with various
input resolutions, adjust screen positioning and
crop video noise from around the original input
video boundary.
This technology also keeps the gate count of the
AL250 scan doubler low while outputting high
quality video compared to competitors products.
This will help expand the market for video
applications, especially the cost sensitive ones.
The internal RGB video lookup tables (LUT),
which are controlled via the I2C interface, can
provide gamma correction for calibrating the
color accuracy of different types of CRT’s and
improving the contrast level to display more
vivid pictures.
For more information about the AL250 or the
other products from AverLogic, please contact
your local authorized representatives, visit our
website, or contact us directly.
A built-in on-screen-display (OSD) with
programmable bitmap RAM allows custom
design icons and on-screen control panels.
DISTRIBUTED BY:
Overlay function is supported to create titling or
on-screen-display menus for video adjustment.
The AverLogic proprietary digital signal
processing technology creates a highly stable
video image without tearing effects or jagged
edges. The output picture is smoother and has
less flicker than the original input signal/picture.
AVERLOGIC TECHNOLOGIES, INC. E-mail: sales_usa@averlogic.com
AVERLOGIC TECHNOLOGIES, CORP. E-mail: sales@averlogic.com.tw
URL: www.averlogic.com
URL: www.averlogic.com.tw
February 25, 2003