AL128

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 new chip is pin-topin compatible with the AverLogic AL100 but provides analog RGB output for SCART implementation.

An 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, 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), 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.