AL250

Video Scan Doubler

Applications

• − TV Ready Multimedia Convert interlaced YUV/RGB (NTSC/PAL) into − TV to PC Scan Converter Box non-interlaced RGB format for CRT or LCD monitors − Progressive Scan TV • Highly integrated design with built-in DAC, SRAM, − Video Game Station OSD and LUT − DVD Player • Built-in on-screen-display with programmable bitmap − Portable VCD Player • Advanced digital line interpolation with no tearing or − LCD Monitor w/VGA Input jagged edge artifacts − Video Based Set-top Box • Reduced interlace flicker − LCD Projector • Auto NTSC/PAL detect

• input of square pixel, ITU-R BT 601 Description (CCIR 601), or user-defined format

• I2C programming interface The AL250 Video Scan Doubler (De- • Internal RGB video lookup table (LUT) to provide Interlacer) is a video conversion chip for gamma correction consumer video and multimedia • Overlay support for title making and complex on- applications. It converts interlaced NTSC screen display or PAL, ITU-R BT 601 (CCIR601) or • Self-initialization without software (Plug & Play) square pixel, YUV422 or RGB565 digital • 3.3 or 5 volt support signals into computer monitor RGB signals for direct connection to a computer monitor or progressive scan TV.

On-screen Video Memory Display

8-bit DAC R RGB Video Digital 16 Video 8-bit DAC G Video Processor Lookup YUV or RGB Formatter input and Scan Doubler Tables 8-bit DAC B

VCLK VCLKX2 RSET Timing VIDHS VREF Control 2 VIDVS I C Circuit Mode Control COMP HREF 2

AL250-01 SCL STD SDA GVS GHS RESET GHREF CADDR INTYPE 2 I SQUARE OVLCTRL

AVERLOGIC TECHNOLOGIES, INC. E-mail: [email protected] URL: www.averlogic.com AVERLOGIC TECHNOLOGIES, CORP. E-mail: [email protected] URL: www.averlogic.com.tw February 25, 2003

VGA Monitor Satellite Receiver/Tuner AL250 AL242 TV-to-VGA TV LCD Decoder Converter Panel Video Chip

VCR

(Internal; YUV422)

Laser Disc/DVD Digital TV

(Internal; YUV422)

Video Games

AL250 Typical Applications AL250-02

By using I2C interface control, the AL250 can This technology also keeps the gate count of the also be programmed to co-ordinate with various AL250 scan doubler low while outputting high input resolutions, adjust screen positioning and quality video compared to competitors products. crop video noise from around the original input This will help expand the market for video video boundary. applications, especially the cost sensitive ones. The internal RGB video lookup tables (LUT), For more information about the AL250 or the which are controlled via the I2C interface, can other products from AverLogic, please contact provide gamma correction for calibrating the your local authorized representatives, visit our color accuracy of different types of CRT’s and website, or contact us directly. improving the contrast level to display more vivid pictures. A built-in on-screen-display (OSD) with DISTRIBUTED BY: 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.

AVERLOGIC TECHNOLOGIES, INC. E-mail: [email protected] URL: www.averlogic.com AVERLOGIC TECHNOLOGIES, CORP. E-mail: [email protected] URL: www.averlogic.com.tw February 25, 2003