Video processor LSI corrects images in real time

Rohm Co. Ltd has developed the BU1573KV, a video processor LSI that corrects video images in real time for improved readability, even under less than ideal ambient conditions. Optimized for LCD display units in car navigation and entertainment systems, the core consists of an Adaptive Image Enhancer originally developed for surveillance cameras.

The AIE function of the BU1573KV treats each section of the video image independently using a number of algorithms based on the brightness—as opposed to conventional units that process the entire image using one uniform brightness value. Moreover, an RGB LCD interface is integrated for compatibility with the RGB 18/16 format, making it easy to add onto existing systems while delivering outstanding clarity even on WVGA++ sized LCD displays. A PMW signal generator for backlight modulation as well as brightness and gamma correction lead to a remarkable viewing experience.

The device provides the following features:

?The AIE Core is capable of correcting the brightness of each frame of the image.
?Each image is rendered completely—similar to the human eye—resulting in staggeringly clear visuals.
?Built-in color correction function delivers crisp, clear images.
?Compatible with a number of display resolutions, from QCIF (176 x 144) to WVGQ+ (854 x 480).
?Supports both CPU bus and RGB interfaces.
?Compatible with 18/16 bit input/output format.
?Multiple operation modes: Image Enhance, Analysis, Through and Sleep.
?Two selectable register settings: indirect addressing through the CPU bus or the I?C interface.
?Equipped with PWM output for LCD backlight control.
?Built-in gamma and edge-enhancement filters.

Normally, all of these functions result in increased energy consumption. BU1573KV was engineered to operate at low power, 1.5mW (at 15fps QVGA) to reduce the load on the battery. Sample price begins at $8.5.