AL128 datasheet(2/2 Pages) AVERLOGIC

2 / 2 page

AVERLOGIC TECHNOLOGIES, INC. E-mail: sales_usa@averlogic.com

URL: www.averlogic.com

AVERLOGIC TECHNOLOGIES, CORP. E-mail: sales@averlogic.com.tw

URL: www.averlogic.com.tw

February 25, 2003

integrated

high-quality

anti-flicker

filter

(SmartFilter

 ) 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

sub-sampling

algorithms.

The major functions of the AL128 can be

accessed using four push buttons combined with

the on-screen-menu feature, this eliminates 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.

Functional Description

Either analog RGB or digital RGB data can be

input to the chip. The analog RGB data is

digitized by three 50MHz 8-bit video A/D’s and is

converted into 24-bit digital RGB data. For

graphic controllers with standard or proprietary

digital RGB output such as a high-color feature

connector, VAFC, or flat panel interface, the

optional 24-bit digital RGB interface provides a

solution for optimal video quality.

The 24-bit digital RGB is passed to the digital

processing unit of the chip. This DSP unit

performs scan conversion operations and other

digital signal processing such as flicker filtering,

YUV filtering, scaling and color space conversion

in the digital domain. The processed video data is

sent to the digital TV encoder for converting into

broadcast quality composite and S-video signals

or original RGB format, which are in turn

converted by three 9-bit D/A converters into

analog outputs.

Functions

can

controlled

dedicated

hardware pins as well as software.

The I

interface provides full software programmability.

The

aforementioned

hardware

and

software

programmability also applies for the power-down

feature. Alternatively only four push buttons are

required to control the major functions such as

sharpness, pan, zoom, brightness, color bar output

and position centering without the use of software

or microcontroller.

For more information about the AL128 or the

other products from AverLogic, please contact

our local representatives, visit our website, or

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