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| 型号： | P83C266 |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | Microcontrollers for PAL/SECAM TV with OSD and VST(带 OSD和 VST的在PAL/SECAM TV中应用的微控制器) |
| 中文描述： | 对于PAL微控制器/ OSD和伟仕SECAM电视（带OSD和伟仕的在PAL制式/ SECAM电视中应用的微控制器） |
| 文件页数： | 68/92页 |
| 文件大小： | 382K |
| 代理商： | P83C266 |
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1999 Mar 10
68
Philips Semiconductors
Product specification
Microcontrollers for PAL/SECAM TV
with OSD and VST
P8xCx66 family
17.15 OSD meshing
Meshing results is a contrast reduction of a selected video
area. This reduced contrast enhances the reliability of the
OSD character displayed in that area without the loss of
the video information in that area in case of a normal solid
background. This feature is implemented by replacing the
normal character solid background by a checker-board
pattern background and inverts this pattern every new
frame. The checker-board pattern itself is generated by
switching FB on and off with a pixel frequency in the first
frame and off and on in the next frame only for those OSD
characters that have background switched on.
The OSD character itself or its contrast is not affected by
the meshing feature
The meshing function is frame based
Normal background is replaced by an alternating
meshing pattern
For meshing the meshing bit and the background mode
must be set
Meshing can only be activated in TV mode, e.g mode bit
(bit 5 in SFR OSCON) must be a logic 0.
Fig.43 TV/video signal superimposed with checker-board pattern.
handbook, full pagewidth
MGM684
TAXI
OSD background colour
checker-board pattern
TV/Video colour
Fig.44 Complete meshing feature.
handbook, full pagewidth
MGM685
TAXI
V
V
OLUME
IIII
OSD character
(not affected by the checker-board pattern
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相关代理商/技术参数 |
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|---|---|
| P83C266BDR | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Microcontrollers for PAL/SECAM TV with OSD and VST |
| P83C270 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC |
| P83C270AAR | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC |
| P83C280 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc. |
| P83C366 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Microcontrollers for PAL/SECAM TV with OSD and VST |
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