AL128

· Convert non-interlaced VGA or Macintosh video into interlaced TV format (NTSC/PAL)
· Analog RGB output for SCART interface
· Highly integrated design with built-in NTSC/PAL encoder, ADC, DAC and SRAM
· Broadcast TV quality
· High clarity 5-line anti-flicker filter
· 8 levels of sharpness control
· Plug and play with no need for software or micro-controller
· Supports up to full 1024x768 VGA resolution
· Automatically supports scan rate from 50 Hz up to 100 Hz
· Linear vertical and horizontal overscan/ underscan control
· Zoom and freeze controls
· Four-touch-button interface with on-screenmenu (on TV) to control all key functions
· Horizontal and vertical position centering control
· Optional digital 24-bit RGB/VAFC interface for best quality
· Power down feature controlled by software or hardware
· Full programmability via I2C interface
· Picture panning control
· Brightness control
· Built-in color bar
· Simultaneous display on PC and TV monitors
· Single 5-volt support
· Thin, small LQFP package for PCMCIA or notebooks. 28x28 PQFP available upon request

The AL128 PC to TV scan converter chip accepts graphic data up to 1024x768 resolution from PC and Macintosh graphics controllers and converts it into broadcastquality NTSC or PAL TV signals. In addition to analog RGB, 24-bit digital RGB data can be input to maintain the best video quality and avoid noise problems. This AL128 new chip is pin-topin compatible with the AverLogic AL100 but provides analog RGB output for SCART implementation.

An AL128 integrated high-quality anti-flicker filter (SmartFilterÔ ) removes the unpleasant flicker caused by the interlaced display of high contrast graphics while maintaining the original clarity and sharpness of informative data such as natural pictures and text.

With 512Kbytes of memory in AL128, plug-and-play is achieved by automatically detecting the scan rate and resolution of the incoming graphic signals without the use of software. With less memory than other solutions on the market, high resolution data is processed and stored by using a complex and proprietary buffer management system. No compromise is made at all with video quality by using either compression or sub-sampling algorithms.

The major functions of the AL128 can be accessed using four push buttons combined with the on-screen-menu feature, eliminating the cost of a micro-controller and complex control panel. The superior quality scaling algorithm, which reduces the jagged-edge artifacts from line dropping, can smoothly fit
graphics of 640x480 (up to 100 Hz) and 1024x768 (up to 75Hz) resolutions into the visible region of the NTSC or PAL screen. Both horizontal and vertical sizes can be linearly adjusted. Additional features include eight levels of flicker control using 5-line filter, zoom control and picture freeze.

This highly integrated mix-signal chip, packaged in 24mm x 24mm 160-pin LQFP (low quad flat package), AL128 is powered by a single 5-volt power supply. Power-down is achieved by using either hardware or software control.

The enhanced features and superior quality make the AL128 very suitable for PC video to
TV conversion in PC ready multimedia TV's, scan converter boxes, VGA add-on cards, Web TVs, or network / laptop PCs.