NT68625MEFG-128 查看數據表（PDF） - Novatek Microelectronics

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NT68625MEFG-128

Flat Panel Monitor Controller

Novatek Microelectronics 

NT68665/NT68625

6.7. Video Processor

Video processor consists of Interpolation Control, RGB Gain Control, RGB Offset Control, Hue and

Saturation Control, Dithering Control, Gamma Correction Control and sRGB Support.

NT68665/NT68625’s enhanced interpolation method makes the zoomed display image look more

smooth and comfortable.

User can adjust the RGB Gain (Contrast) and RGB Offset (Brightness) by the registers in the ADCPLL

block, or registers in the Video processor block. But for YUV video input, it is suitable to adjust

Contrast and Brightness at here. In addition, it supports all YUV color controls including brightness,

contrast, hue and saturation.

Dithering function can provide 16.7 million colors space for 6-bit/color panel. It is recommended to

open the dithering function while a 6-bit panel is used.

68665 provide independently horizontal and vertical zoom scaler with adjustable zoom factor from

1/4x to 4x. Each of the zoom scaler uses variable sharpness filter to provide high quality scaling of

real-time video and still graphic images.

Interpolation

1. Flexible Sharpness Filter

68665 include flexible sharpness filter for horizontal and vertical sharpness adjusting. Users can use

them by register programming.

2. Vertical Spatial Interpolation

When interlaced video or images are applied, the 68665 vertical scaling engines will de-interlace the

input fields spatially and reposition them to align the display’s line map.

3. Advanced Filter

With the aid of two selectable advanced filters when zooming up horizontally, 68665 provides the most

undistorted image from the original one.

sRGB Support

sRGB is a standard for color exchange proposed by Microsoft and HP. The sRGB controls can be

used to make LCD monitors sRGB compliant.



A0 

R' 

sRGB









G'  A1 



 sRGB  

B' 



 sRGB 











A2



B0

B1

B2

C0 R 



 sRGB 

Offset R





C1 G 



 sRGB 





C 2 B 





 

sRGB









Offset

Offset



G

B 

-----------------------------------[1]

Gamma Correction

 Provides 10-bit gamma correction function

 Hardware piecewise simulation method

 F/W needs to define total 256 end-point value in advance

2006-02-09

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Ver. 0.40

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