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| AL251 Video Scan Doubler Applications - - - LCD Monitor w/TV Input LCD Projector Video Editing Equipment * 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 * * * * * * * * * * * * Description The AL251 Video Scan Doubler (DeInterlacer) 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. Video Memory On-screen Display RGB Video Lookup Tables 16 8-bit DAC Digital YUV or RGB output R G B Digital YUV or RGB input 16 Video Formatter Video Processor and Scan Doubler 8-bit DAC 8-bit DAC VCLK VCLKX2 VIDHS VIDVS HREF Timing Control RSET I2C Circuit 2 Mode Control VREF COMP RESET SCL OVLCTRL SQUARE SDA I2CADDR INTYPE GHS GVS GHREF STD AL251-01 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 VGA Monitor Satellite Receiver/Tuner AL242 TV Decoder Video Analog AL251 TV-to-VGA Converter Chip Digital Digital Digital Video Processor 640x480 LCD Panel VCR (Internal; YUV422) Laser Disc/DVD (Internal; YUV422 or RGB) LCD Controller eg. AL300 LCD Panel (Others) Video Games LCD Projector AL251 Typical Applications 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 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. 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: AL251-02 Feature Border color OSD/bitmap Overlay LUT Analog RGB V V V V Digital RGB Digital YUV V 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: 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 |
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