AL251 AVERLOGIC | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 2
Technical content
AVERLOGIC TECHNOLOGIES, INC. e-mail: sales_usa@averlogic.com URL: www.averlogic.com February 25, 2003 AL251 Video Scan Doubler
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 8-bit DAC 8-bit DAC 8-bit DAC Video Processor and Scan Doubler R G B Timing Control I2C Circuit VCLK HREF SCL SDA I2CADDR AL251-01 Digital YUV or RGB input Mode Control Video Formatter RGB Video Lookup Tables Video Memory GHREF GVS GHS OVLCTRL STD INTYPE SQUARE VIDHS VIDVS RSET VREF COMP RESET VCLKX2 On-screen Display Digital YUV or RGB output
AVERLOGIC TECHNOLOGIES, INC. e-mail: sales_usa@averlogic.com URL: www.averlogic.com February 25, 2003 By using I 2C 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 the I 2C 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) with programmable bitmap RAM allows custom design icons and on-screen control panels. 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. Please note that some features of the AL251 analog output may not apply to the digital outputs. The following table summarizes them: Feature Analog RGB Digital RGB Digital YUV Border color V OSD/bitmap V V Overlay V V LUT V For more information about the AL251 or the other products from AverLogic, please contact your local authorized representatives, visit our website, or contact us directly. DISTRIBUTED BY: AL251 TV-to-VGA Converter Chip VCR Satellite Receiver/Tuner Video AL251 Typical Applications AL251-02 Laser Disc/DVD Video Games AL242 TV Decoder 640x480 LCD Panel (Internal; YUV422) (Internal; YUV422 or RGB) LCD Panel (Others)LCD Controller eg. AL300 LCD Projector Video Processor VGA Monitor Analog Digital Digital Digital