AL251 Datasheet, PDF (1/2 Pages) AverLogic Technologies Inc – Video Scan Doubler

Video Scan Doubler
AL251
Applications
− LCD Monitor w/TV Input
− LCD Projector
− Video Editing Equipment
Description
The AL251 Video Scan Doubler (De-
Interlacer) is a video conversion chip for
LCD VGA display or video editing
applications. It converts interlaced NTSC
or PAL, ITU-R BT 601 (CCIR601) or
square pixel, YUV422 or RGB565 digital
data into non-interlaced analog RGB
signals for direct connection to a
computer monitor or progressive scan TV,
or digital RGB565 /YUV422 output for
LCD monitors, projectors, or other
applications.
• Convert interlaced digital YUV/RGB (NTSC/PAL) into
non-interlaced YUV/RGB format for LCD monitors or
video processing
• 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
• Analog/digital non-interlaced RGB (VGA) output (Scan
Doubled or De-interlaced) or digital YUV output
• I²C programming interface
• Internal RGB video lookup table (LUT) to provide
gamma correction
• Overlay support for title making and complex on-screen
display
• Self-initialization without software (Plug & Play)
• 3.3 or 5 volt support
Digital
YUV or RGB
input
VCLK
VCLKX2
VIDHS
VIDVS
HREF
Video Memory
On-screen
Display
16
Video
Formatter
Video Processor
and Scan Doubler
16
RGB
Video
Lookup
Tables
8-bit DAC
8-bit DAC
8-bit DAC
Timing
Control
I²C Circuit
Mode Control
2
Digital YUV or
RGB output
R
G
B
RSET
VREF
COMP
AL251-01
AVERLOGIC TECHNOLOGIES, INC. e-mail: [e-mail]
AVERLOGIC TECHNOLOGIES, CORP. e-mail: [e-mail]
URL: www.averlogic.com
URL: www.averlogic.com.tw
February 25, 2003