AL250 Video Scan Doubler Applications − − − − − − − − − • 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 • • • • • • Description • • 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. • • • 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: [email protected] AVERLOGIC TECHNOLOGIES, CORP. E-mail: [email protected] 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: [email protected] AVERLOGIC TECHNOLOGIES, CORP. E-mail: [email protected] URL: www.averlogic.com URL: www.averlogic.com.tw February 25, 2003