Video Processor Module

32579B

7.2.3Mixer/Blender Block

The Mixer/Blender block of the Video Processor module performs all the necessary functions to properly mix/blend the video data and the graphics data. These functions include Color Space Conversion (CSC), optional Gamma correction, color/chroma key, and the mixing/blending logic. See Figure 7-10for block diagram of the Mixer/Blender Block.

Video/Graphics mixing/blending can be performed in either the YUV or RGB format. The YUV to RGB CSC (see Sec-

tion 7.2.3.1) is used on the video data when RGB mixing/ blending is desired and the RGB to YUV CSC is used on the graphics data when YUV blending is desired. If Gamma Correction (see Section 7.2.3.2) on the video data is desired, it must be done in the color space of the input video data, which can be either YUV or RGB. If Gamma Correction on the graphics data is desired, it must be done in the color space of the input graphics data, which is RGB.

CSC_FOR_VIDEO

GV_GAMMA_SEL

GV_GAMMA_SEL * /GAMMA_EN

 

Video, 4:4:4

YUV or RGB

CSC

 

 

 

 

0

 

 

 

YUV to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RGB

 

 

 

 

1

 

 

 

 

 

 

 

Optional

 

 

 

 

 

 

 

1

 

 

 

 

 

Graphics,

 

 

Gamma

 

 

 

 

 

 

 

 

 

 

 

 

 

RGB

 

 

0

Correction

 

 

 

 

 

 

 

 

 

RAM

 

 

 

 

 

 

0

1

/GV_GAMMA_SEL * /GAMMA_EN

Color/Chroma

CRT DACs and

 

 

 

 

 

TFT Interface

 

 

 

 

 

 

 

 

 

 

FLICKER_FILT_CNTRL = 01

1/2 Y

Key and

 

 

 

 

 

Mixer/Blender

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flicker

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Filter

 

 

 

 

 

 

 

0

1

 

 

 

 

 

 

 

 

 

 

 

 

 

YUV Data

 

 

 

 

 

 

 

 

1

TVOUT Block

 

 

 

0

CSC

 

 

 

0

 

 

 

 

1

RGB to

 

 

 

 

 

CSC_FOR_

 

 

YUV

 

 

 

 

 

 

 

 

 

 

 

 

 

GRAPHICS

 

 

 

 

 

 

 

 

 

 

 

 

 

Cursor Color Key

 

Compare

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

1

 

 

 

 

Compare

 

 

COLOR_CHROMA_SEL

Color/Chroma Key

Figure 7-10. Mixer/Blender Block Diagram

AMD Geode™ SC1200/SC1201 Processor Data Book

323

Page 323
Image 323
AMD SC1201, SC1200 manual Mixer/Blender Block, Csc, Rgb, Ram, Yuv