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參數(shù)資料
| 型號： | AL251 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Video Scan Doubler |
| 中文描述： | 視頻掃描倍增器 |
| 文件頁數(shù)： | 4/33頁 |
| 文件大?。?/td> | 595K |
| 代理商： | AL251 |
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AL250
July 28, 1999
4
3.0 General Description
The AL250/251 Video Scan Doubler (De-Interlacer) is a video conversion chip for consumer video
and multimedia applications. It converts interlaced NTSC or PAL, ITU-RBT 601 (CCIR 601) or
square pixel, YUV422 or RGB565 digital signals into computer monitor RGB signals for direct
connection to a computer monitor or progressive scan TV.
By using I
2
C interface control, the AL250/251 can also be programmed to co-ordinate with various
input resolutions, adjust screen positioning and crop video noise from around the original input video
boundary.
The internal RGB video lookup tables (LUT), which are controlled via I
2
C interface, can provide
gamma correction for calibrating the color accuracy of different types of CRT’s and improving the
contrast level to display more vivid pictures.
A built-in on-screen-display (OSD) provides programmable bitmap RAM for custom design icons
and on-screen control panels.
Overlay function is supported to create titling or on-screen-display menus for video adjustment.
The AL251 provides all the features of the AL250. Additionally, it has digital output in YUV422 or
RGB565 format
, and can convert NTSC video for VGA LCD panels
.
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.
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