參數(shù)資料
型號： AL128
廠商： Electronic Theatre Controls, Inc.
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:55; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:22; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No
中文描述： 即插即用VGA到的NTSC / PAL制式轉(zhuǎn)換器
文件頁數(shù)： 19/45頁
文件大小： 498K
代理商： AL128
AL128
April 2, 1999
19
To zoom, use register #20h to enable it, and then use #2Bh and #2Ch to position it.
6.9 Frame Buffer Management
Only one half Mbytes of field memory are needed to achieve 24-bit video quality and full resolution
scan conversion for either NTSC or PAL. Field memory supported is AverLogic AL422, NEC
μ
PD42280 and OKI MSM518221/222. With less memory than other solutions on the market, high
resolution data is processed and stored by using a complex and proprietary frame buffer management
system. There is no compromise with video quality by using either compression or sub-sampling
algorithms. Special care is taken in the design so that there is no tearing effect (feathered edge) when
playing back moving video sequences such as MPEG I or MPEG II.
To take advantage of the high capacity of the AL422, please review the AL128 Application Notes
Supplement for details.
6.10 Digital Video Encoder
The digital video encoder inputs the digital color-space and scan-rate converted video data and
output broadcast quality NTSC and PAL signals. The color sub-carrier is generated by a four times
over-sampling clock, which greatly simplifies external analog smoothing filter design. Eight times
over-sampling mode is also available by software control. The modulated digital signals are
converted to analog levels by three 9-bit D/A converters. Composite and S-video signals are output
simultaneously. Interlaced RGB output can also be provided.
6.11 Push Button Interface/OSD
The push button interface is used with the on-screen-display menu. There are four buttons: menu,
select, increment and decrement. Functions controlled by these push buttons are pan, zoom, position
centering, brightness, underscan, color bar and sharpness.
The AL128 EVB provides a user-friendly on-screen control with four push buttons, [Menu],
[Select], [<] and [>], for end users to control the major functions of the AL128. There are eight on-
screen control functions, which are:
Sharpness
Panning
Positioning
Color bar
Zoom
Over/underscan
Brightness
Home settings
相關(guān)PDF資料
PDF描述
AL1402 Circular Connector; No. of Contacts:100; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:22; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No
AL251 Video Scan Doubler
AL3201 Circular Connector; No. of Contacts:19; Series:D38999; Body Material:Metal; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-19
AL440B Circular Connector; No. of Contacts:128; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:24; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No
AL440B-12 Circular Connector; No. of Contacts:56; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:24; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:24-4 RoHS Compliant: No
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