AL251

Features:

· Convert interlaced TV signal (NTSC/PAL) into non-interlaced RGB format for CRT monitors or LCD panels
· Highly integrated design with built-in DAC, SRAM, OSD and LUT
· Built-in on-screen-display with programmable bitmap
· Interpolated scan doubling with no tearing or jagged edge artifacts
· Reduced interlace flicker
· Auto NTSC/PAL detect
· Digital video input of square pixel, ITU-RBT 601 (CCIR 601), or user-defined format
· Analog/digital non-interlaced RGB (VGA) signal output (Scan Doubled or Deinterlaced)
· I2C programming interface
· Power-down control via I2C
· Internal RGB video lookup table (LUT) to provide gamma correction and special effects
· Overlay support for title making and complex on-screen display
· Self-initialization without software (Plug & Play)
· 3.3 or 5 volt support
· 16-bit digital RGB/YUV output (AL251 only)




Application

· TV-ready Multimedia Computer Monitor
· TV to PC Video Scan Converter Box
· Progressive Scan TV
· Video Game Station
· DVD Player
· LCD TV Monitor




Pinout






Description



The AL251 Video Scan Doubler (De-Interlacer) is a video conversion chip for LCD VGA display or video editing applications. AL251 converts interlaced NTSC or PAL, ITU-R BT 601 (CCIR601) or Square pixel, YUV422 or RGB 565 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.

The AL251 Video Scan Doubler (De-Interlacer) is a video conversion chip for consumer video and multimedia applications. It converts interlaced NTSC or PAL, ITU-RBT 601 (CCIR 601) or square pixel, YUV422 or RGB565 digital signals into computer monitor RGB signals for direct connection to a computer monitor or progressive scan TV.

By using I2C interface control, the AL251 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. The internal RGB video lookup tables (LUT), which are controlled via 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. A built-in on-screen-display (OSD) provides programmable bitmap RAM for custom design icons and on-screen control panels. Overlay function is supported to create titling or on-screen-display menus for video adjustment.

The AL251 provides all the features of the AL250. Additionally, it has digital output in YUV422 or RGB565 format, and can convert NTSC video for VGA LCD panels. The AverLogic proprietary digital signal processing technology creates a highly stable video image without tearing effects or jagged edges. The output picture of AL251 is smoother and has less flicker than the original input signal/picture.